CALCULATION OF FLOOR RESPONSE SPECTRA. CASE STUDY FOR THE MAIN EQUIPMENT OF A 35 MW STEAM TURBINE
|
|
- Luke Chase
- 6 years ago
- Views:
Transcription
1 XIV МЕЖДУНАРОДНА НАУЧНА КОНФЕРЕНЦИЯ ВСУ th INTERNATIONAL SCIENTIFIC CONFERENCE VSU' CALCULATION OF FLOOR RESPONSE SPECTRA. CASE STUDY FOR THE MAIN EQUIPMENT OF A 5 MW STEAM TURBINE Stoyan Andreev Risk Engineering Ltd. Abstract: The current paper presents the calculation of floor response spectra for the main equipment of a thermal power plant, situated in an area with high design peak ground acceleration. Dynamic time-history analyses are performed, using artificial ground motion records, compatible with BDS EN 998-/NA. The dynamic soilstructure interaction is taken into account by introducing frequency-independent lumped spring and dashpot, defined with varying soil properties. The calculated response spectra for the equipment support locations are enveloped and broadened, so they could be used as a seismic design basis by the equipment's manufacturer. Keywords: Earthquake Engineering, Floor Response Spectra, Soil-Structure Interaction, Time-History Seismic Analysis, Turbine Foundation Reconstruction. Introduction In - Risk Engineering Ltd. replaced a 55 years old steam turbine at Sofia TPP with a new one having a net capacity of 5 MWe. This required a reconstruction of the existing turbine foundation, including removal of RC walls to fit the condensing boiler heater, construction of a new massive RC girder supporting the turbine front bearings (#), and enlargement of the RC girder supporting the turbine rear bearings (#). Steam turbine foundations are relatively stiff structures, so their seismic response is determined mostly by the dynamic soil-structure interaction and the hysteretic soil behaviour, especially for soft soils. The non-linear hysteretic behaviour of the foundation RC structure has a lesser, but also considerable effect on the floor response spectra.. Background for the Analyses The main purpose of the performed analyses was obtaining the floor (in-structure) response spectra for the equipment supports and this determines the applied simplifications and assumptions... Structural Modelling The original structure was built with concrete grade BM5, which is equivalent to grade C/5 in EC. For the reconstruction concrete grade C/5 is used. Reinforcement (rebars and structural steel sections) is added only in the mass density of the RC. The concrete material parameters are calculated according to ref. [], see Table. MSc, Structural Engineer, Vihren Str, Buxton 68, Sofia, Bulgaria, Stoyan.Andreev@RiskEng.bg
2 XIV МЕЖДУНАРОДНА НАУЧНА КОНФЕРЕНЦИЯ ВСУ th INTERNATIONAL SCIENTIFIC CONFERENCE VSU' Table. Concrete material parameters Concrete grade Density, t/m Poisson s ratio E ci, MPa E c, MPa G c, MPa C/ C/ A detailed finite element model is developed using SAP []. In the model X- direction is horizontal, parallel to the turbine axis, Y-direction is horizontal, transverse to the turbine-generator axis and Z-direction is vertical. Equipment is modelled as lumped masses. Floor response spectra are calculated for the locations of the equipment, see Fig.. Fig.. FE model of the turbine-generator foundation The foundation mat is x6 meters in size, embedded meters in the ground. It is assumed to be rigid [5]. The total height of the structure is.6 meters. The total mass of the structure, including the equipment is approximately 65 tons The behaviour factor of the structure in the reconstruction design is given as q=.5. The used relations between q, the ductility ratio μ, the effective period of the structure T eff and the initial period of the fixed base structure T are given in ref. [] and []. The modal analysis shows that initial natural period of the structure with a fixed base is.6 sec. It is calculated that μ=.6 and T eff =.7 sec. The effective material damping for a given ductility ratio is calculated according to equations in ref. [] and []. For μ=.6 the calculated effective damping is ξ eff =9.%. To adjust the fixed base period the bending stiffness of the structural members is decreased by 6% and the shear stiffness is decreased by %... Soil-Structure Interaction In the analyses the soil is represented with a 6 DOFs lumped spring-dashpot []. It is assumed that the clay layer is thick and uniform for the considered depth m. According to EC8 this is a type C soil with shear wave velocity V S, =8 6 m/s [8]. The uncertainties in the soil stiffness are treated as given by ref. [5] a best estimated (BE) value for the initial shear modulus G max is assumed, and lower (LB) and upper (UB) values are calculated by dividing or multiplying the BE value by a factor of. The strain softening of the soil due is considered with shear wave velocity reduction factor n=.6, as given in ref. []. The reduced shear wave velocity is noted as V s,r. Corresponding soil hysteretic damping is calculated using shear strain damping relations after Ishibashi and Zhang for G eff and PI= [6]. The soil properties are given in Table.
3 XIV МЕЖДУНАРОДНА НАУЧНА КОНФЕРЕНЦИЯ ВСУ th INTERNATIONAL SCIENTIFIC CONFERENCE VSU' Table. Initial and effective soil parameters Variation Density, Poisson s V s,, G max, G t/m V ratio m/s MPa s,r, m/s eff, Damp, MPa % BE LB UB The spring and dashpot constants are calculated with equations developed by Richard et al [5], [7]. For uniform soil layer they are frequency-independent, see Tables and. Table. Lumped spring stiffness Variation K rx, K ry, K rz, K ψx, K ψy, K t, MN/m MN/m MN/m MNm/rad MNm/rad MNm/rad BE LB UB Table. Lumped dashpot constants Variation C rx, C ry, C rz, C ψx, K ψy, K t, MN.s/m MN.s/m MN.s/m MNm.s/rad MNm.s/rad MNm.s/rad BE 6,7 8,5 8, LB 5,9 7, 57, UB 5,8 5,, Seismic input The target free-field spectra are the elastic response spectra from EC8/NA with importance factor of., soil factor. and reference ground acceleration.g [8]. For the analyses a set of three statistically independent ground motions is generated using the program SIMQKE-II. The time step of the records is. sec. The envelope shape is based on the Compound model of Jeninngs et al. [9]. The total length of the records is sec with a sec strong motion part. The PGA is approximately.8g for horizontal and.g for vertical direction. The compatibility between the artificial ground motions and the target spectra is evaluated according to ref. [5]. The comparison between the target spectra and the spectra of the generated ground motions is shown in Fig...5 Acc X Acc Y Target.9*Target Acc Z Target.9*Target Fig.. Seismic input: Horizontal directions; Vertical direction
4 XIV МЕЖДУНАРОДНА НАУЧНА КОНФЕРЕНЦИЯ ВСУ th INTERNATIONAL SCIENTIFIC CONFERENCE VSU'.. Dynamic Analyses and Calculation of Floor Response Spectra Linear modal time-history analyses are performed for the three soil conditions. In each case vibration modes up to at least 5 Hz are calculated with a procedure using Ritz vectors. Composite modal damping is applied, including soil damping, dashpot viscous damping and RC material damping []. The procedure for calculating design floor response spectra is given in Commentary to ref. [5].. Analytical Results The two fundamental horizontal mode shapes for BE soil are shown in Fig.. Fig.. Predominant mode shapes: Hz; Hz The modal mass participation ratios of the predominant modes are given in Table 5 Table 5. Modal Mass Participation Ratios of the Predominant Modes Mode Freq, Hz UX, % UY, % UZ, % RX, % RY, % RZ, % The predominant modes in all three principal directions are determined by the SSI. The first mode in Y-direction at is pure rocking and has the lowest natural frequency at.85 due to the large (.5:) aspect ratio of the foundation mat. The relatively high centre of masses compared to the Y-direction mat size also contributes for this response. In X- direction the predominant mode is sliding-rocking and due to the larger mat size in this direction the frequency is higher. Hz. The Z-direction predominant mode is translational and governed by the SSI.
5 XIV МЕЖДУНАРОДНА НАУЧНА КОНФЕРЕНЦИЯ ВСУ th INTERNATIONAL SCIENTIFIC CONFERENCE VSU' The calculated -damping envelope raw (not broadened) floor response spectra for turbine supports # and # are shown in Fig. 5. Both locations are shown in Fig.. X-dir. Y-dir. Z-dir. X-dir. Y-dir. Z-dir Fig. 5. Enveloped raw floor response spectra, damping: Turbine support #; Turbine support # The strong influence of the foundation s large aspect ratio is clear in the raw response spectra the Y-direction spectrum has the highest spectral accelerations for the lowest frequency range (.-.5 Hz). The spectra for turbine supports # and # are similar with some difference around.5 Hz the predominant frequency for UB soil. The torsion response at.99. In X-direction the effect of the structural response is more pronounced there is a peak in the spectral accelerations for turbine support # with values about % higher for the predominant frequencythe DFRS for the condensing boiler heater have smaller values due to its lower location. Design floor response spectra (DFRS) for horizontal directions at Turbine supports # and # are shown in Fig. 6 and 7. % % % % % % Fig. 6. DFRS, X-direction: Turbine support #; Turbine support #
6 XIV МЕЖДУНАРОДНА НАУЧНА КОНФЕРЕНЦИЯ ВСУ th INTERNATIONAL SCIENTIFIC CONFERENCE VSU' 5 % % % 5 % % % Fig. 7. DFRS, Y-direction: Turbine support #; Turbine support # Conclusion A set of three statistically independent ground motion records compatible with the response spectra and PGA given by EC8/NA is developed. Detailed FE model of the foundation structure is developed, using the FEA code SAP. Three linear dynamic analyses of the considered turbine foundation have been performed using equivalent stiffness and damping to account for soil-structure interaction, hysteretic soil behaviour and ductile response of the RC structure. The seismic response of the system is determined by the aspect ratio of the foundation the predominant mode shape is rocking in Y-direction. The peak spectral acceleration for turbine and generator supports in Y-direction is higher than the peak acceleration in X-direction. The two turbine supports have different peak spectral accelerations in X-direction due to the structural response of the foundation. DFRS are developed as seismic design basis for the main equipment of the TPP unit. Acknowledgement The author wishes to thank Dr Marin Kostov and Mr Georgi Varbanov for their expert guidance during this project, and to Ms Nina Koleva for her assistance in the calculation of artificial ground motions and DFRS. REFERENCES [] Comite Euro-International Du Beton. CEB-FIP Model Code 99, 99. [] Computers and Structures inc. CSi Analysis Reference Manual, Berkeley,. [] Iwan W.D. Estimating inelastic response spectra from elastic spectra, Earthquake Engineering and Structural Dynamics, Vol. 8, 98, pp [] FEMA. Improvement of Nonlinear Static Seismic Analysis Procedures, 5. [5] ASCE -98. Seismic Analyses of Safety-Related Nuclear Structures, 997. [6] Ishibashi I., Zhang X. Unified Dynamic Shear Moduli and Damping Ratios of Sand and Clay, Soils and Foundations, Vol., No., pp [7] Richart F.E., et al. Vibrations of Soils and Foundations, Prentice-Hall, 97. [8] BDS EN 998-/NA. National Annex to Eurocode 8, Part, (in Bulgarian) [9] Jennings P.C., Housner G.W., Tsai N.C. Simulated Earthquake Motions, EERL Report, California Institute of Technology, 968.
Transactions, SMiRT-22 San Francisco, California, USA - August 18-23, 2013 Division V
Transactions, SMiRT- San Francisco, California, USA - August 8-, SIMPLIFIED MODELING OF EFFECTS OF CONCRETE CRACKING ON OUT-OF-PLANE VIBRATIONS OF FLOORS Luben Todorovski, Mahmoud Khoncarly, Dan M Ghiocel,
More informationAssessment of the Dynamic Response of the Soil to Strong Ground Motion at a Wind Farm
Assessment of the Dynamic Response of the Soil to Strong Ground Motion at a Wind Farm A.Cichowicz Council for Geoscience, South Africa SUMMARY: An assessment of the dynamic response of the soil to strong
More informationApplication of Isolation Technology in High-voltage Electrical Equipments
Application of Isolation Technology in High-voltage Electrical Equipments WEN Bo 1 AND ZHANG Jun-fa 2, NIU Di-tao 3 1 Doctoral Candidate, Dept. of Civil Engineering, Xi an University of Architecture &
More informationResponse Analysis of an RC Cooling Tower Under Seismic and Windstorm Effects D. Makovička
Response Analysis of an RC Cooling Tower Under Seismic and Windstorm Effects D. Makovička The paper compares the RC structure of a cooling tower unit under seismic loads and under strong wind loads. The
More informationSOIL-STRUCTURE INTERACTION EFFECTS ON NUCLEAR STRUCTURES FOUNDED ON ROCK SITES
SOIL-STRUCTURE INTERACTION EFFECTS ON NUCLEAR STRUCTURES FOUNDED ON ROCK SITES L. M. Anderson 1, A. Hashemi 2 and F. Ostadan 3 ABSTRACT Following the US NRC 50.54 letter, all operating plants in the United
More informationSeismic Evaluation of a 1930 Steel Bridge with Lightly Reinforced Concrete Piers
Seismic Evaluation of a 1930 Steel Bridge with Lightly Reinforced Concrete Piers R. Tinawi & M. Leclerc École Polytechnique de Montréal, Canada D. Mitchell McGill University, Canada A. Massad Hydro-Québec,
More informationSeismic Response of RC Building Structures using Capacity Spectrum Method with included Soil Flexibility
Seismic Response of RC Building Structures using Capacity Spectrum Method with included Soil Flexibility G. N. Cvetanovska, R. Apostolska and J. Cvetanovska University "Ss. Cyril and Methodius", Institute
More informationLinear and Nonlinear Seismic Analysis of a Tall Air Traffic Control (ATC) Tower
Linear and Nonlinear Seismic Analysis of a Tall Air Traffic Control (ATC) Tower A. Adnan, M. Vafaei & A.K. Mirasa Faculty of Civil Engineering, Universiti Teknologi Malaysia SUMMARY: Air Traffic Control
More informationBase isolation. Philippe Bisch IOSIS, EGIS group. EUROCODE 8 Background and Applications
EUROCODE 8 Background and Applications Dissemination of information for training Lisbon, 10-11 February 2011 1 Base isolation Philippe Bisch IOSIS, EGIS group EUROCODE 8 Background and Applications BASE
More informationSEISMIC SSI ANALYSIS OF US EPR TM NUCLEAR ISLAND USING DIRECT METHOD
Transactions, irt-23, Paper 535 SEIIC SSI ANALYSIS OF US EPR TM NUCLEAR ISLAND USING DIRECT METHOD Tobias Richter 1, Calvin Wong 2, and Brian Loseke 3 1 Engineer, AREVA Inc., Santa Clara, CA, U.S.A. 2
More informationSEISMIC SOIL-PILE GROUP INTERACTION ANALYSIS OF A BATTERED PILE GROUP
4 th International Conference on Earthquake Geotechnical Engineering June 25-28, 27 Paper No. 1733 SEISMIC SOIL-PILE GROUP INTERACTION ANALYSIS OF A BATTERED PILE GROUP Nan DENG 1, Richard KULESZA 2 and
More informationA COMPARISON OF SASSI2010 and SAP2000 FIXED-BASE ANALYSIS RESULTS FOR VALIDATION OF A LARGE SCALE NUCLEAR REACTOR BUILDING MODEL
Transactions, SMiRT-22 A COMPARISON OF SASSI2010 and SAP2000 FIXED-BASE ANALYSIS RESULTS FOR VALIDATION OF A LARGE SCALE NUCLEAR REACTOR BUILDING MODEL Mohsin R. Khan 1, Ming S. Yang 1, J.C. Chen 1, and
More informationCOMPARATIVE ANALYSIS OF SEISMIC ISOLATED SYSTEMS IN BRIDGES
COMPARATIVE ANALYSIS OF SEISMIC ISOLATED SYSTEMS IN BRIDGES APPLICATION TO A STUDY CASE João Tiago Ferreira Marques de Abreu Abstract This paper represents the resume of a study where is evaluated the
More informationINFLUENCE OF BNWF SOIL MODELLING ON DYNAMIC BEHAVIOUR OF PILE FOUNDATION FOR RC FRAME WITH STRUCTURAL WALL
ICOVP, 3 th International Conference on Vibration Problems 29 th November 2 nd December, 27, Indian Institute of Technology Guwahati, INDIA INFLUENCE OF BNWF SOIL MODELLING ON DYNAMIC BEHAVIOUR OF PILE
More informationComparisons of Current Seismic Assessment Methods for Non-Seismic Designed Reinforced Concrete Bridges
Comparisons of Current Seismic Assessment Methods for Non-Seismic Designed Reinforced Concrete Bridges P. Chomchuen Mahanakorn University of Technology, Thailand V. Boonyapinyo Thammasat University, Rangsit
More informationSEISMIC DESIGN CHARACTERISTICS OF THE NEW BUILDING FOR DIGITAL AUTOMATION EQUIPMENT FOR LOVIISA NUCLEAR POWER PLANT
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 2803 SEISMIC DESIGN CHARACTERISTICS OF THE NEW BUILDING FOR DIGITAL AUTOMATION EQUIPMENT FOR LOVIISA
More informationVALLIAMMAI ENGINEERING COLLEGE DEPARTMENT OF CIVIL ENGINEERING SUBJECT CODE: CE6701 SUBJECT NAME: STRUCTURAL DYNAMICS AND EARTHQUAKE ENGINEERING YEAR : IV SEM : VII QUESTION BANK (As per Anna University
More informationSeismic safety assessment of an unreinforced masonry building in Albania
Vienna Congress on Recent Advances in Earthquake Engineering and Structural Dynamics 2013 (VEESD 2013) C. Adam, R. Heuer, W. Lenhardt & C. Schranz (eds) 28-30 August 2013, Vienna, Austria Paper No. 205
More informationDynamic interaction of adjacent tall building structures on deep foundations
Earthquake Resistant Engineering Structures VIII 173 Dynamic interaction of adjacent tall building structures on deep foundations M. A. Rahgozar & M. Ghandil Department of Civil Engineering, University
More informationACCURATE LINEAR AND NONLINEAR SEISMIC SSI ANALYSIS BASED ON ANSYS FE MODELING USING EXTENDED SASSI METHODOLOGY
Transactions, SMiRT-24 II, Paper 468 ACCURATE LINEAR AND NONLINEAR SEISMIC SSI ANALYSIS BASED ON ANSYS FE MODELING USING EXTENDED SASSI METHODOLOGY Dan M. Ghiocel 1, Mike Saremi 2 1 Chief of Engineering
More informationNonlinear Dynamic Analysis of Base Isolated Reinforced Concrete Building
Nonlinear Dynamic Analysis of Base Isolated Reinforced Concrete Building Anju Agarwal 1, Nirendra Dev 2, Ibadur Rahman 3 Research Scholar, Department of Civil Engineering, Delhi Technological University,
More informationStructure-To-Soil-Structure Interaction Analysis: A Case Study
Missouri University of Science and Technology Scholars' Mine International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics 2010 - Fifth International Conference
More informationEarthquake Design of Flexible Soil Retaining Structures
Earthquake Design of Flexible Soil Retaining Structures J.H. Wood John Wood Consulting, Lower Hutt 207 NZSEE Conference ABSTRACT: Many soil retaining wall structures are restrained from outward sliding
More informationABSTRACT 1. INTRODUCTION
Seismic response analysis of pile foundations W.D. Liam Finn, G. Wu, T. Thavaraj Department of Civil Engineering, University ofbritish Columbia, Vancouver, British Columbia V6T1Z4, Canada ABSTRACT A method
More informationSEISMIC DESIGN OF STRUCTURE
SEISMIC DESIGN OF STRUCTURE PART I TERMINOLOGY EXPLANATION Chapter 1 Earthquake Faults Epicenter Focal Depth Focus Focal Distance Epicenter Distance Tectonic Earthquake Volcanic Earthquake Collapse Earthquake
More informationNONLINEAR PERFORMANCE OF A TEN-STORY REINFORCED CONCRETE SPECIAL MOMENT RESISTING FRAME (SMRF)
NONLINEAR PERFORMANCE OF A TEN-STORY REINFORCED CONCRETE SPECIAL MOMENT RESISTING FRAME (SMRF) Houssam Mohammad Agha, Li Yingmin, Oday Asal Salih and A ssim Al-Jbori Doctoral Candidate, College of Civil
More informationSEISMIC SOIL-STRUCTURE INTERACTION ANALYSIS INCLUDING GROUND MOTION INCOHERENCY EFFECTS
October 2-7, 28, Beijing, China Paper 4-2-25 SEISMIC SOIL-STRUCTURE INTERACTION ANALYSIS INCLUDING GROUND MOTION INCOHERENCY EFFECTS Farhang Ostadan, Nan Deng 2, Orhan Gurbuz 3 and Sanjeev Malushte 4 Bechtel
More informationSTRUCTURAL CHALLENGES OF POWER PLANTS IN HIGH SEISMIC AREAS
STRUCTURAL CHALLENGES OF POWER PLANTS IN HIGH SEISMIC AREAS Peter NAWROTZKI 1 and Daniel SIEPE 2 ABSTRACT Power plant buildings and machines can be protected against seismic demands utilizing proven 3-
More informationMODAL PUSHOVER ANALYSIS OF RC FRAME BUILDING WITH STAIRCASE AND ELEVATOR CORE
10NCEE Tenth U.S. National Conference on Earthquake Engineering Frontiers of Earthquake Engineering July 21-25, 2014 Anchorage, Alaska MODAL PUSHOVER ANALYSIS OF RC FRAME BUILDING WITH STAIRCASE AND ELEVATOR
More informationTorsional and Seismic Behavior of Shear Wall Dominant Flat Plate Buildings
Torsional and Seismic Behavior of Shear Wall Dominant Flat Plate Buildings Ramya S R 1, Dr. P M Ravindra 2 1M. Tech Student, Department of Civil Engineering, Bangalore Institute of Technology, Bengaluru-
More informationCANDU 6 Nuclear Power Plant: Reactor building floor response spectra considering seismic wave incoherency
CANDU 6 Nuclear Power Plant: Reactor building floor response spectra considering seismic wave incoherency A. Nour 1,2, A. Cherfaoui 1, V. Gocevski 1 & P. Léger 2 1 Hydro Québec, Montréal, Québec, H2L4P5,
More informationEFFICIENCY OF USING VISCOUS DAMPERS FOR MULTI-STOREY STEEL STRUCTURES SUBJECTED TO SEISMIC ACTIONS
11 th International Conference on Vibration Problems Z. Dimitrovová et al. (eds.) Lisbon, Portugal, 9-12 September 213 EFFICIENCY OF USING VISCOUS DAMPERS FOR MULTI-STOREY STEEL STRUCTURES SUBJECTED TO
More informationMalaysian Journal of Civil Engineering 28(2): (2016) Md. Abul Hasan*
Malaysian Journal of Civil Engineering 28(2):257-269 (2016) PERFORMANCE OF REINFORCED CONCRETE HOSPITAL BUILDING SUBJECTED TO EARTHQUAKE USING BASE-ISOLATION SYSTEM Md. Abul Hasan* Department of Disaster
More informationDesign Provisions for Earthquake Resistance of Structures. The Standards Institution of Israel
Israeli Standard SI 413 June 1995 Amendment No. 5 December 2013 Design Provisions for Earthquake Resistance of Structures The Standards Institution of Israel 42 Haim Levanon, Tel Aviv 69977, tel. 03-6465154,
More informationSEISMIC RESPONSE OF A REINFORCED CONCRETE ARCH BRIDGE
84 SEISMIC RESPONSE OF A REINFORCED CONCRETE ARCH BRIDGE Kazuhiko KAWASHIMA And Atsushi MIZOGUTI SUMMARY This paper presents an analysis of the seismic response characteristics and seismic performance
More informationSeismic Soil Pressure for Building Walls-An Updated Approach
11 th International Conference on Soil Dynamics and Earthquake Engineering (11 th ICSDEE) and the 3 rd International Conference on Earthquake Geotechnical Engineering (3 rd ICEGE), University of California,
More informationSEISMIC VULNERABILITY ASSESSMENT OF STEEL PIPE SUPPORT STRUCTURES
10NCEE Tenth U.S. National Conference on Earthquake Engineering Frontiers of Earthquake Engineering July 21-25, 2014 Anchorage, Alaska SEISMIC VULNERABILITY ASSESSMENT OF STEEL PIPE SUPPORT STRUCTURES
More informationSeismic SSI Response of Reactor Building Structures
Seismic SSI Response of Reactor Building Structures ABSTRACT Dan M. Ghiocel GP Technologies, Inc., 6 South Main St., 2 nd Floor, Pittsford, New York 14534, USA, e-mail: dan.ghiocel@ghiocel-tech.com Luben
More informationComparison of Eurocode 8 and Turkish Earthquake Code 2007 for Residential RC Buildings in Cyprus
Comparison of Eurocode 8 and Turkish Earthquake Code 2007 for Residential RC Buildings in Cyprus I. SAFKAN University College London, UK SUMMARY The Cyprus Island is located at seismic zone and many destructive
More informationSEISMIC PROTECTION OF MACHINERY, BUILDINGS AND EQUIPMENT OF NUCLEAR POWER PLANTS BY USING 3-D BASE CONTROL SYSTEMS
Transactions, SMiRT-23 SEISMIC PROTECTION OF MACHINERY, BUILDINGS AND EQUIPMENT OF NUCLEAR POWER PLANTS BY USING 3-D BASE CONTROL SYSTEMS Peter Nawrotzki 1, and Daniel Siepe 2 1 Director, GERB Schwingungsisolierungen
More informationEarthquake Resistant Design for Low Rise Open Ground Storey Famed Building
IJSTE - International Journal of Science Technology & Engineering Volume 2 Issue 11 May 2016 ISSN (online): 2349-784X Earthquake Resistant Design for Low Rise Open Ground Storey Famed Building Himanshu
More informationINELASTIC SEISMIC RESPONSE ANALYSES OF REINFORCED CONCRETE BRIDGE PIERS WITH THREE-DIMENSIONAL FE ANALYSIS METHOD. Guangfeng Zhang 1, Shigeki Unjoh 2
INELASTIC SEISMIC RESPONSE ANALYSES OF REINFORCED CONCRETE BRIDGE PIERS WITH THREE-DIMENSIONAL FE ANALYSIS METHOD Abstract Guangfeng Zhang 1, Shigeki Unjoh 2 This paper aims to provide an analysis method
More informationClassical soil-structure interaction and the New Zealand structural design actions standard NZS (2004)
Proc. 18 th NZGS Geotechnical Symposium on Soil-Structure Interaction. Ed. CY Chin, Auckland Classical soil-structure interaction and the New Zealand structural design actions standard NZS 1170.5 (2004)
More informationDesign Spectra for Seismic Isolation Systems in Christchurch, New Zealand
Design Spectra for Seismic Isolation Systems in Christchurch, New Zealand D. Whittaker Beca Ltd, Christchurch, New Zealand. L. R. Jones Maxlide Inc, California, USA. 2013 NZSEE Conference ABSTRACT: Acceleration
More informationModal-spectral analysis of a gas storage tank.
Modal-spectral analysis of a gas storage tank. Description of the structure: A Spherical tank gas storage is formed by: 1.- S-355 steel sphere plate elements of 1.5 cm thickness. 2.- Eight vertical posts
More informationVery Low Seismicity Areas
Vol. XIX, 2011, No. 3, 1 9 M. Sokol, L. Konečná, M. Čuhák, M. Dallemule Very Low Seismicity Areas in Slovakia and Comparison of Seismic Risks in Central European Countries Milan SOKOL milan.sokol@stuba.sk
More information3.5 Tier 1 Analysis Overview Seismic Shear Forces
Chapter 3.0 - Screening Phase (Tier ) 3.5 Tier Analysis 3.5. Overview Analyses performed as part of Tier of the Evaluation Process are limited to Quick Checks. Quick Checks shall be used to calculate the
More informationSTUDYING THE EFFECT OF EARTHQUAKE EXCITATION ANGLE ON THE INTERNAL FORCES OF STEEL BUILDING S ELEMENTS BY USING NONLINEAR TIME HISTORY ANALYSES
STUDYING THE EFFECT OF EARTHQUAKE EXCITATION ANGLE ON THE INTERNAL FORCES OF STEEL BUILDING S ELEMENTS BY USING NONLINEAR TIME HISTORY ANALYSES Mahmood Hosseini 1 and Ali Salemi 2 1 Associate Professor,
More informationSeismic Response of Simply Supported Deck Bridges with Auxiliary Superelastic Devices
Available online at www.sciencedirect.com Procedia Engineering 14 (211) 2315 2322 The Twelfth East Asia-Pacific Conference on Structural Engineering and Construction Seismic Response of Simply Supported
More informationMETHODOLOGY FOR SEISMIC DESIGN OF R/C BUILDING STRUCTURES
METHODOLOGY FOR SEISMIC DESIGN OF R/C BUILDING STRUCTURES Golubka S NECEVSKA-CVETANOVSKA 1 And Roberta P PETRUSEVSKA 2 SUMMARY Two methodologies for aseismic design of R/C buildings are presented in the
More informationDynamic Analysis of Large Steel Tanks
Transactions of the 17 th International Conference on Structural Mechanics in Reactor Technology (SMiRT 17) Prague, Czech Republic, August 17 22, 2003 Paper # K14-1 Dynamic Analysis of Large Steel Tanks
More informationEvaluation of Response Reduction Factor and Ductility Factor of RC Braced Frame
12 JOURNAL OF MATERIALS AND ENGINEERING STRUCTURES 2 (215) 12 129 Research Paper Evaluation of Response Reduction Factor and Ductility Factor of RC Braced Frame Kruti Tamboli, J. A. Amin * Department of
More informationEffect of Curvature and Seismic Excitation Characteristics on the Seismic Response of Seismically Isolated Curved Continuous Bridge
Effect of Curvature and Seismic Excitation Characteristics on the Seismic Response of Seismically Isolated Curved Continuous Bridge Li Yu 1, Zhong Tieyi 1, Yang Fengli 1 and Yan Guiping 1 1 School of Civil
More informationThis point intends to acquaint the reader with some of the basic concepts of the earthquake engineer:
Chapter II. REVIEW OF PREVIOUS RESEARCH II.1. Introduction: The purpose of this chapter is to review first the basic concepts for earthquake engineering. It is not intended to review the basic concepts
More informationSeismic response of steel plate shear walls considering soil-structure interaction
Seismic response of steel plate shear walls considering soil-structure interaction P. Memarzadeh, J. Mirlohi and F. Behnamfar Abstract Due to structural efficiency, Steel Plate Shear Wall (SPSW) is widely
More informationEFFECTS OF STRONG-MOTION DURATION ON THE RESPONSE OF REINFORCED CONCRETE FRAME BUILDINGS ABSTRACT
Proceedings of the 9th U.S. National and 1th Canadian Conference on Earthquake Engineering Compte Rendu de la 9ième Conférence Nationale Américaine et 1ième Conférence Canadienne de Génie Parasismique
More informationComparative Study of Pushover Analysis on RCC Structures
Comparative Study of Pushover Analysis on RCC Structures Ashwini.K.C PG Student, Department of Civil Engineering, The National Institute of Engineering, Mysore, Karnataka, India Dr. Y. M. Manjunath Professor,
More informationSSRG International Journal of Civil Engineering ( SSRG IJCE ) Volume 4 Issue 6 June 2017
SSRG International Journal of Civil Engineering ( SSRG IJCE ) Volume Issue 6 June 7 Analysis of Multi- RCC Frames of Regular and Irregular Plan Configuration using Response Spectrum Method Dhananjay Shrivastava
More informationFagà, Bianco, Bolognini, and Nascimbene 3rd fib International Congress
COMPARISON BETWEEN NUMERICAL AND EXPERIMENTAL CYCLIC RESPONSE OF ALTERNATIVE COLUMN TO FOUNDATION CONNECTIONS OF REINFORCED CONCRETEC PRECAST STRUCTURES Ettore Fagà, Dr, EUCENTRE, Pavia, Italy Lorenzo
More informationSeismic Assessment of Traditional Masonry-Wooden Building in Taiwan
Seismic Assessment of Traditional Masonry-Wooden Building in Taiwan Yu-Chun Lin, Ja-Shian Chang, To-Nan Chen & Chung-Hsien Shih Department of Architecture, National Cheng Kung University, Taiwan SUMMARY:
More informationEngr. Thaung Htut Aung M. Eng. Asian Institute of Technology Deputy Project Director, AIT Consulting
Engr. Thaung Htut Aung M. Eng. Asian Institute of Technology Deputy Project Director, AIT Consulting Selection of Structural systems Load paths Materials Approximate sizing of members Primary mechanisms
More informationREHABILITATION OF RC BUILDINGS USING STRUCTURAL WALLS
REHABILITATION OF RC BUILDINGS USING STRUCTURAL WALLS Ahmed GHOBARAH 1 And Maged YOUSSEF 2 SUMMARY A developed macroscopic model is applied to the analysis of an example structure to demonstrate the use
More informationSEISMIC ISOLATION FOR MEDIUM RISE REINFORCED CONCRETE FRAME BUILDINGS
SEISMIC ISOLATION FOR MEDIUM RISE REINFORCED CONCRETE FRAME BUILDINGS Himat T Solanki*, Consultant, Sarasota, Florida, USA Vishwas R Siddhaye, Emeritus Professor, College of Engineering, Pune, India Gajanan
More informationSoil-Structure interaction effects on seismic response of a 16 storey RC framed building with shear wall
American Journal of Engineering Research (AJER) e-issn : 2320-0847 p-issn : 2320-0936 Volume-2 pp-53-58 www.ajer.org Research Paper Open Access Soil-Structure interaction effects on seismic response of
More informationSeismic Response Analysis of a Concrete Filled Steel Tubular (CFST) Arch Bridge
Seismic Response Analysis of a Concrete Filled Steel Tubular (CFST) Arch Bridge K. Bi & H. Hao University of Western Australia, Australia W. Ren Hefei University of Technology, China SUMMARY: This paper
More informationSeismic Protection of Lead-Cooled Reactors
Seismic Protection of Lead-Cooled Reactors Finite Element Modelling and Dynamic Analyses of Isolated NPPs Francisco Beltrán SILER Project Training Course Verona, May 2012 TABLE OF CONTENTS 1 2 3 4 5 6
More informationPLAXIS as a Tool for Soil-Structure Interaction Modelling in Performance- Based Seismic Jetty Design
PLAXIS as a Tool for Soil-Structure Interaction Modelling in Performance- Based Seismic Jetty Design Floris Besseling MSc & Arny Lengkeek MSc, Witteveen+Bos, The Netherlands The importance of soil structure
More informationComparison of Seismic Behavior of Multi-Storey R/C Buildings With and Without Internal Beams
Comparison of Seismic Behavior of Multi-Storey R/C Buildings With and Without Internal Beams I. A. Tegos Department of Civil Engineering, Aristotle University of Thessaloniki, Greece V. P. Panoskaltsis
More informationCOMPARISON BETWEEN THE DIRECT DISPLACEMENT BASED DESIGN AND THE FORCE BASED DESIGN METHODS IN REINFORCED CONCRETE FRAMED STRUCTURES
COMPARISON BETWEEN THE DIRECT DISPLACEMENT BASED DESIGN AND THE FORCE BASED DESIGN METHODS IN REINFORCED CONCRETE FRAMED STRUCTURES Adel ElAttar, AbdelHamd Zaghw and Ahmed Elansary 3 ABSTRACT Force-based
More informationSeismic Sloshing in a Horizontal Liquid-Storage Tank
To appear in the Journal of Structural Engineering International Seismic Sloshing in a Horizontal Liquid-Storage Tank Praveen K. Malhotra, Parag Nimse and Michael Meekins Summary A horizontal water storage
More informationSOIL STRUCTURE INTERACTION EFFECTS ON BASE ISOLATED BRIDGES
The 14 th October 1-17, 8, Beijing, China SOIL STRUCTURE INTERACTION EFFECTS ON BASE ISOLATED BRIDGES Olmos B. A. 1 and Roesset J. M. 1 Professor, Facultad de Ingeniería Civil, Universidad Michoacana de
More informationADAPTATION OF HIGH VISCOUS DAMPERS (HVD) FOR ESSENTIAL DECREASING OF IN-STRUCTURE FLOOR RESPONSE SPECTRA
18th International Conference on Structural Mechanics in Reactor Technology (SMiRT 18) Beijing, China, August 7-12, 2005 SMiRT18-K11-6 ADAPTATION OF HIGH VISCOUS DAMPERS (HVD) FOR ESSENTIAL DECREASING
More informationAssistant Professor, Applied Mechanics Department, Government College of Engineering, Amravati, India 2
[Akhare et al., 3(5): May, 1] ISSN: 77-955 Scientific Journal Impact Factor: 3.9 (ISRA), Impact Factor: 1.5 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Seismic Performance
More informationINTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 1, No 4, 2011
Response of RC structures subjected to near fault and far fault earthquake motions considering soil structure interaction Tavakoli.H.R 1, Naeej.M 2, Salari.A 2 1 Assistant Professor, Department of Civil
More informationTURBO GENERATOR MACHINE FOUNDATIONS SUBJECTED TO EARTHQUAKE LOADINGS
TURBO GENERATOR MACHINE FOUNDATIONS SUBJECTED TO EARTHQUAKE LOADINGS P.St. Fleischer 1 and P.G. Trombik 2 1 Trombik Engineers Ltd. Zurich, Switzerland, Email: p.fleischer@trombik.ch 2 Trombik Engineers
More informationINTERNATIONAL JOURNAL OF PURE AND APPLIED RESEARCH IN ENGINEERING AND TECHNOLOGY
INTERNATIONAL JOURNAL OF PURE AND APPLIED RESEARCH IN ENGINEERING AND TECHNOLOGY A PATH FOR HORIZING YOUR INNOVATIVE WORK EVALUATION OF RESPONSE REDUCTION FACTOR FOR REINFORCED CONCRETE FRAME ABHIJIT P.
More informationDynamic Response of Ground Supported Rectangular Water Tanks to Earthquake Excitation
Research Article http://dx.doi.org/10.4314/mejs.v9i1.5 Dynamic Response of Ground Supported Rectangular Water Tanks to Earthquake Excitation Birhane Aregawi* and Abdulaziz Kassahun School of Civil Engineering,
More informationFEM Analyses on Seismic Responses of Rocking Structural Systems with Yielding Base Plates
FEM Analyses on Seismic Responses of Rocking Structural Systems with Yielding Base Plates by Mitsumasa Midorikawa 1, Tatsuya Azuhata 2, Tadashi Ishihara 2, Akira Wada 3 and Izuru Okawa 4 ABSTRACT The seismic
More informationSeismic assessment of an existing hospital
International Students Conference of Civil Engineering, ISCCE 2012, 10-11 May 2012, Epoka University, Tirana, Albania Seismic assessment of an existing hospital Egla Luca Department of Civil Engineering,
More informationDynamic Analysis of a Concrete Shear-Wall
20th International Conference on Structural Mechanics in Reactor Technology (SMiRT 20) Espoo, Finland, August 9-14, 2009 SMiRT 20-Division 5, Paper 1908 Dynamic Analysis of a Concrete Shear-Wall Jaegyun
More informationThe International Conference on Earthquake Engineering and Seismology. Naveed Anwar. ICEES April 2011 NUST, Islamabad Pakistan
The International Conference on Earthquake Engineering and Seismology Naveed Anwar ICEES 2011 25-26 April 2011 NUST, Islamabad Pakistan The why, the how and the what of Performance Based Design and Review
More informationFull-Scale Shaking Table Tests of XLam Panel Systems - Correlation With Cyclic Quasi-Static Tests
Full-Scale Shaking Table Tests of XLam Panel Systems - Correlation With Cyclic Quasi-Static Tests V. Hristovski, M. Stojmanovska Institute of Earthquake Engineering and Engineering Seismology (IZIIS),Skopje,
More informationMULTI-LEVEL FORTIFICATION INTENSITIES SEISMIC PERFORMANCE ASSESSMENT FOR REINFORCED CONCRETE FRAME- SHEAR WALL STRUCTURE WITH VISCOUS DAMPERS
MULTI-LEVEL FORTIFICATION INTENSITIES SEISMIC PERFORMANCE ASSESSMENT FOR REINFORCED CONCRETE FRAME- SHEAR WALL STRUCTURE WITH VISCOUS DAMPERS Wenfeng Liu*, Jing Wang* * School of Civil Engineering, Qingdao
More informationInternational Journal of Engineering Research & Science (IJOER) ISSN: [ ] [Vol-3, Issue-3, March- 2017]
Design, Analysis & Performance Check of A Multi-Story (G+23) RCC Building by Pushover Analysis using Sap 2000 Shahana Rahman 1, Mr. Ashish Yadav 2, Dr. Vinubhai R. Patel 3 1 M.tech Student: Structural
More informationModeling of Reinforced Concrete Folded Plate Structures for Seismic Evaluation Swatilekha Guha Bodh
Modeling of Reinforced Concrete Folded Plate Structures for Seismic Evaluation Swatilekha Guha Bodh Abstract Folded Plates and spatial structures are adopted for construction of large span structures in
More informationStatic and Dynamic Analyses of Asymmetric Reinforced Concrete Frames
Static and Dynamic Analyses of Asymmetric Reinforced Concrete Frames T. Mahdi Building and Housing Research Centre, Tehran, Iran V. Soltangharaie Faculty of Building and Housing, Tehran, Iran SUMMARY:
More informationANALYSIS OF 3-D VIBRATIONS OF THE BASE ISOLATED SCHOOL BUILDING "PESTALOZZI" BY ANALYTICAL AND EXPERIMENTAL APPROACH
ANALYSIS OF 3-D VIBRATIONS OF THE BASE ISOLATED SCHOOL BUILDING "PESTALOZZI" BY ANALYTICAL AND EXPERIMENTAL APPROACH Mihail A GAREVSKI 1, James M KELLY 2 And Nikola V ZISI 3 SUMMARY The results obtained
More informationSeismic Design Criteria for Structures, Systems, and Components in Nuclear Facilities
ASCE/SEI 43-05 American Society of Civil Engineers Seismic Design Criteria for Structures, Systems, and Components in Nuclear Facilities This document uses both the International System of Units (SI) and
More informationFAST NONLINEAR SEISMIC SSI ANALYSIS OF LOW-RISE CONCRETE SHEARWALL BUILDINGS FOR DESIGN-LEVEL (DBE) AND BEYOND DESIGN-LEVEL (BDBE)
Transactions, SMiRT-24 FAST NONLINEAR SEISMIC SSI ANALYSIS OF LOW-RISE CONCRETE SHEARWALL BUILDINGS FOR DESIGN-LEVEL (DBE) AND BEYOND DESIGN-LEVEL (BDBE) Dan M. Ghiocel 1 YoungSun Jang 2 and InHee Lee
More information0306 SEISMIC LOADS GENERAL
0306 SEISMIC LOADS 0306.1 GENERAL Every structure, and portion thereof, including nonstructural components such as architectural, mechanical, and electrical components, shall be designed and constructed
More informationKey Words: Seismic Risk, Hazard analysis, Fragility analysis, Radiation dose, evaluation response spectrum
Development of a Seismic Risk Assessment System for Low and Intermediate Level Radioactive Waste Repository - Current Status of Year 1 Research - 11393 Kim, Min Kyu *, Choi, In-Kil *, Jeong, Jongtae *
More informationby Dr. Mark A. Ketchum, OPAC Consulting Engineers for the EERI 100 th Anniversary Earthquake Conference, April 17, 2006
Principles of Earthquake Engineering of Bridges Part 1: Principles & Approach by Dr. Mark A. Ketchum, OPAC Consulting Engineers for the EERI 100 th Anniversary Earthquake Conference, April 17, 2006 Presentation
More informationEVALUATION OF SEISMIC BEHAVIOR OF IRREGULAR STEEL STRUCTURES IN PLAN WITH BRB AND EBF BRACES UNDER NEAR-FAULT EARTHQUAKE
IJBPAS, January, 2015, 5(1), Special Issue: 572-581 ISSN: 2277 4998 EVALUATION OF SEISMIC BEHAVIOR OF IRREGULAR STEEL STRUCTURES IN PLAN WITH BRB AND EBF BRACES UNDER NEAR-FAULT EARTHQUAKE HOSSEIN NASERI
More informationMID-STORY SEISMIC ISOLATION FOR STRENGTHENING OF A MULTI-STORY BUILDING
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 1443 MID-STORY SEISMIC ISOLATION FOR STRENGTHENING OF A MULTI-STORY BUILDING Jiandong ZHOU 1, Ming HU
More informationINTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 2, No 2, 2011
INTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 2, No 2, 2011 Copyright 2010 All rights reserved Integrated Publishing services Research article ISSN 0976 4399 Seismic soil structure interaction
More informationSeismic devices for bridges
Earthquake Resistant Engineering Structures VI 95 Seismic devices for bridges D. Mestrovic & G. Grebenar Faculty of Civil Engineering, University of Zagreb, Croatia Abstract The paper summarizes earthquake
More informationApplication of Performance Based Nonlinear. of RC Buildings. A.Q. Bhatti National University of Sciences and Technology (NUST), Islamabad, Pakistan
Application of Performance Based Nonlinear Seismic Static Pushover Design and Analysis Simulation for Seismic Design of RC Buildings A.Q. Bhatti National University of Sciences and Technology (NUST), Islamabad,
More informationJSEE. Soil-Structure Interaction Analyses Using Cone Models
JSEE Winter 2009, Vol. 10, No. 4 Soil-Structure Interaction Analyses Using Cone Models Sassan Mohasseb 1 and Bahareh Abdollahi 2 1. Technical Director, SMTEAM GmbH 8706 MEILEN-Switzerland, email: smteam@gmx.ch
More informationFloor spectra for analysis of acceleration-sensitive equipment in buildings
Floor spectra for analysis of acceleration-sensitive equipment in buildings Vladimir Vukobratović University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
More informationISSN: ISO 9001:2008 Certified International Journal of Engineering Science and Innovative Technology (IJESIT) Volume 2, Issue 4, July 2013
Vibration Control of Uniformly Tapered Chimney by Using Tuned Mass Damper INGALE S. D., MAGDUM M. M. 1. PG student, civil department, Sinhgad College of Engineering, Pune 2. Professor, Civil Department,
More information