Programme for International Symposium on Design and Construction of Steel and Composite Structures

Transcription

1 Programme for International Symposium on Design and Construction of Steel and Composite Structures Organised by: Department of Civil & Environmental Engineering National University of Singapore Venue: LT7A, Faculty of Engineering, NUS Date: 22 January 2015 (Thursday) Time: 1:00 pm 5:10 pm Admission: Free Objective The need for sustainable construction is hastened around the world aiming to reduce the consumptions of construction materials. Especially in Singapore, the situation is to reduce concrete consumption by 50% in accordance with the Ministry of National Development guideline for construction. Some ways to achieve this is to replace the conventional concrete with more sustainable non concrete alternatives such as steel, or to use steel concrete composite structures. Steel concrete composite members have been used in many structural applications, especially in high rise buildings around the world. Although a series of design guides on composite structures have been produced by the American, Chinese, Europe, and Japan codes as well as by CIDECT (International Committee for the Development and study of Tubular Structures), they do not provide additional guidelines on the use of high strength concrete and high tensile steel in the composite structures, which will be further reducing the consumption of construction materials. This Symposium aims to introduce the latest design practice and experience in the area of steelconcrete composite structures, including material requirements, advanced second order analysis, steelconcrete composite structural design and practical joint details. A design guide based on Eurocode 4 will be released for the design of composite members with special considerations for higher concrete strength with compressive strength up to 90N/mm 2 and higher grade of steel with yield strength up to 550N/mm 2. This symposium is jointly supported by BCA, SSSS, ARC, JFE Steel and Yongnam Engineering and Construction Pte Ltd. Programme 13:00 13:30 Registration 13:30 13:40 Opening speech of symposium chairman 13:40 14:05 "Direct second order analysis for stability design of steel structures" by Professor Siu Lai CHAN 14:05 14:30 "Design application & fabrication of S460m TMCP steel plates in steel and composite structures" by Mr Koji OKI 14:30 14:55 "Material requirements for steel and composite structures" by Professor Sing Ping CHIEW 14:55 15:45 Tea break 15:45 16:10 Fabrication and construction of the Singapore national stadium roof structure" by Mr Chelvadurai HARENDRAN 16:10 16:35 "Connection design of concrete filled tubular (CFT) structures in Japan" by Mr Takayuki NANBA

2 16:35 17:00 "Design codes and practical applications of concrete filled tubular (CFT) structures in japan" by Professor Akihiko Kawano 17:00 17:25 "High strength composite columns for high rise buildings new design guide for Singapore" by Professor J Y Richard LIEW 17:25 17:40 Closing Speaker 1 Curriculum Vitae of Speakers Direct Second Order Analysis for Stability Design of Steel Structures This lecture discusses a new and curved beam column element with arbitrarily located plastic hinge for second order inelastic or direct analysis of planar steel frames. Unlike the conventional plastic hinge element which requires two and more elements to capture the locations of plastic hinge along member length causing much inconvenience to model member initial imperfection, one proposed element per member is sufficient for an accurate analysis. The proposed element explicitly models the member initial imperfection allowing for member P δ effect directly. The plastic hinge is simulated as a gradually softening spring and the corresponding formulae are presented. The additional degrees of freedom in the element are condensed so that the element can be easily incorporated into existing computer programs with dramatic improvement on numerical efficiency and accuracy. Finally, several examples are presented for verifying the accuracy and validity of the proposed element and the work will enhance the practicality of the second order plastic analysis to design of practical structures more economically and efficiently. Professor Siu Lai CHAN Chair Professor in Computational Structural Engineering, Department of Civil and Environmental Engineering The Hong Kong Polytechnic University PhD, FHKIE, MIStructE, FSSS, FHKISC, CEng ceslchan@polyu.edu.hk Professor Chan is now a Chair Professor in Computational Structural Engineering at the Hong Kong Polytechnic University and has published more than 300 papers in journals, books, conferences and keynote/invited papers in major steel conferences overseas. His research interest covers the area of steel structures, structural mechanics and analysis and his book, Non linear static and cyclic analysis of steel frames with semi rigid connections, Elsevier, 2000, pp.336, summarizes his work before Currently Ir Professor Chan is the chief and founding editor of three international journals and serves as a member of editorial boards in 9 others. Professor Chan also served as the chief consultant of the Code of practice for structural uses of steel 2005 and 2011 published by the Buildings Department of the Hong Kong SAR Government. His research on second order direct analysis was incorporated into the Code and used for a number of projects in various places. He is the incumbent President of the Hong Kong Institute of Steel Construction and the Chairman of Structural Division of the HKIE in

3 Speaker 2 Design Application & Fabrication of S460m TMCP Steel Plates in Steel and Composite Structures TMCP steel plates are manufactured by thermo mechanical control rolling process, and, in Japan, widely used for building frames such as welded BOX section, welded H section etc. In the last few years, the TMCP plates, such as EN S460M, had come to be recognised as an economical choice of materials in Asian market due to their potential advantages in design strength and fabrication over the conventional steel plates. This presentation will be focused on benefits and, design and fabrication practices of S460M TMCP Steel Plates. Topics will include Design Case study of Steel & Composite members using S460M TMCP Steel Plates, and welding practices of S460M TMCP Steel Plates. KOJI Oki Manager, JFE Steel Corporation Building Engineering Section Construction Materials & Business Development Department MEng, PEng, BEng, AIJ k oki@jfe steel.co.jp Brief personal history Mar Aug Oct Mar Apr Mar Apr present Graduated Waseda Univ. Completed Cornell Univ., master s course of School of Engineering NKK corporation JFE R&D Corporation JFE Steel Corporation

4 Speaker 3 Material Requirements for Steel and Composite Structures This lecture will focus on material selection and quality control for steel and composite steel concrete structures and will highlight certain key aspects and material requirements in using the latest Structural Eurocodes. Emphasis will be placed on using high strength materials to achieve economy, however, design limitations and restrictions in using such materials for steel and composite structures will also be presented. Dr CHIEW Sing Ping School of Civil and Environmental Engineering Nanyang Technological University PhD, PEng, CEng, FIStructE, FSSS cspchiew@ntu.edu.sg CHIEW Sing Ping is an Associate Professor and was the Head of the Division of Structural Engineering and Mechanics at the School of Civil and Environmental Engineering, Nanyang Technological University, Singapore from 2008 to He is a Past President and Honorary Fellow of the Singapore Structural Steel Society and he has served the industry and profession in various other capacities. He is currently a Member of the Panel of Expert Advisors of the Land Transport Authority, a Member of the Building and Construction Authority Academy Advisory Panel and a Board Member of the Professional Engineers Board of Singapore. His major areas of research interest are in fatigue and fracture of steel structures, steel materials and construction. He is the co author of the popular text book Structural Steelwork Design to Limit State Theory (4 th Edition) as well as author of other training course books on design of steel and composite structures to Eurocodes 3 and 4.

5 Speaker 4 Fabrication and Construction of the Singapore National Stadium Roof Structure This lecture presents the fabrication and construction issues faced by the steel fabricator in the erection on very large span roof structure and explain how these issues can be resolved. The design and fabrication of complex three dimension tubular joints are presented. The lecture also highlights one of the main features of the stadium roof structure which is the retractable roof system. The construction of the retractable roof and how to accommodate the movement during the construction will be explained. Chelvadurai Harendran Yongnam Engineering & Construction (Pte) Ltd Project Director B.Sc. (Lond), P.Eng., C.Eng., M.I.C.E. harendran@yongnamgroup.com Mr. Harendran joined Yongnam in He has over 40 years of experience in the building and construction industry, having started his career in 1971 with Ove Arup & Partners in London as a Design Engineer. He transferred to their Singapore office in 1975 as Senior Design Engineer and was responsible for the design and supervision of the Sabah Foundation Headquarters Building. He joined Woh Hup Pte Ltd in 1979 as Chief Engineer (Design) and Head of Design Department. In 1984 he joined Low Keng Huat (S) Ltd as Project Manager and managed the construction of several key projects including New Tech Park and Keppel Distripark. Since joining Yongnam he has been responsible as Project Director for the structural steelwork at Bangkok Suvarnabhumi International Airport, ION Orchard, Gardens By The Bay, Mumbai International Airport and the National Stadium amongst other notable projects. Mr. Harendran graduated in 1971 with a Bachelor of Science degree from University College, London, and is a Professional Engineer in Singapore, a Chartered Engineer in the UK and a Member of the Institution of Civil Engineers.

6 Speaker 5 Connection Design of Concrete Filled Tubular (CFT) Structure in Japan The main subject of this presentation is to show detail and design method of connection of CF(S)T Column to beam in Japan. Steel tubes or pipes are used for CF(S)T column, therefore inner diaphragm, outer diaphragm, through diaphragm or increased thickness reinforcement type is applied to the connection in most cases. Inner diaphragm type is mainly used for welded box columns, which have usually thick plates. Through diaphragm type is mainly used for cold formed rectangular hollow sections, which is made of relatively thin plate. Outer diaphragm type is mainly used for circular hollow section. In the case of outer diaphragm or increased thickness reinforcement type, adhesion reinforcement between steel tube and concrete may be required. A design method of adhesion reinforcement is also explained. Takayuki Nanba Manager, JFE Steel Corporation Building Engineering Sec. Construction Materials & Business Development Department MEng t namba@jfe steel.co.jp Brief personal history Mar Mar Apr Mar Apr Mar Apr Present Graduated Kyoto Univ., Faculty of Engineering Completed Kyoto Univ., master s course of Graduate School of Engineering NKK corporation JFE R&D Corporation JFE Steel Corporation

7 Speaker 6 Design Codes and Practical Applications of Concrete Filled Tubular (CFT) Structures in Japan In Japan, Concrete Filled Tube (CFT) structure has been widely used for building frames of mid height building as well as high rise building. CFT member can be designed with the smaller outer dimensions due to its advantages in compression strength and deformation capacity. As the advantages became being recognized especially when using for high rise building s column, CFT structure was started being used in 1990 s and became common choice for the building frames in high rise construction. Besides, CFT structure is currently used for structural members such as braces, truss element, arch and piling etc. In general, CFT structures in Japan are currently designed according to recognized design guides of Architectural Institute of Japan (AIJ) and/or Association of New Urban Housing Technology (ANUHT), and Ministry Notification by MLIT which plays a complimentary role of building standard law of Japan. Before the notification being effective, CFT structure had been required to go through the designreview by the authorized certification body to because there was a recognition that concrete filling process of CFT and its quality control method had not being established yet. In 2002, the notification was issued, and CFT structure was authorized to be designed in the same manner with steel structures & RC structures. Firstly, this presentation will introduce outlines of the above mentioned design guides. Especially for the design guide of AIJ which was drafted and edited by the several authors including Prof. Kawano, this presentation will focus on the scope of application and design of structural elements, axial member, column under axial & bending load and beam column connection; the design guide of AIJ is formulated based on the member strength design by the superimposition rule. Beside those, facts & data of built CFT structures in Japan will be introduced in terms of building size, structural system and material strength based on the actual statistical data collected by ANUHT, which play technical advisory roles for the planned projects using CFT in term of structural design and construction work. Professor Akihiko Kawano Department of Architecture Faculty of Human Environmental Studies Kyushu University, Japan Doctor of Engineering kawano@arch.kyushu u.ac.jp Professor Kawano received his B.Eng in Mar. 1974, and M.Eng in Mar from the Kyushu University. In Apr. 1976, he had joined Obayashi corp. and was involved in structural design works. In Mar. 1980, he was assigned as an associate professor of Kyushu University and serves as a professor of the university since Apr until now.

8 His research focus is on steel structures and seismic design and the related subjects of concrete filled tube (CFT). In 2009, he was awarded AIJ prize for the research work of "A series of study on seismic performance evaluation of concrete filled tubular frame structures". Currently, he serves as a director in Kyushu regional board of AIJ, and also serves as a chief board member of managing committee of steel and concrete composite construction. He has been contributing a JISF grant project to promote research & education of steel structures as a chief board member of educational task force in Japanese Institute of Steel Federation (JISF). In Fukuoka prefecture of Japan, he had served as a first chairman of Fukuoka Kenchiku Tekkotsu Kyogikai, professional council of building steel structures, and currently serves as an advisor of the council for securing the adequate quality of the steel structures.

9 Speaker 7 High Strength Composite Columns for High rise Buildings New Design Guide for Singapore High strength concrete and high tensile steel are becoming very attractive materials for high rise buildings because of the need to reduce member size and structural self weight. However, limited test data and design guidelines are available to support the applications of high strength materials for building constructions. This paper presents significant findings from comprehensive experimental investigations on the behaviour of tubular columns in filled with ultra high strength concrete at ambient and elevated temperatures. A series of tests was conducted to investigate the basic mechanical properties of the high strength materials, and structural behaviour of composite columns under compression and bending. High tensile steel with yield strength up to 780MPa and ultra high strength concrete with compressive cylinder strength up to 180MPa were used to construct the concrete filled specimens for testing at ambient and elevated temperature. The test results were compared with the predictions using a modified Eurocode 4 approach. In addition, more than 2000 test data samples collected from literature on concrete filled steel tubes with normal and high strength materials were also analysed to formulate the new design guide for implementation in practice. This lecture will explain the design principles of the guide book which will be distributed made available for use in Singapore. Professor Richard Liew Department of Civil & Environmental Engineering National University of Singapore E1A 07 03, 1 Engineering Drive 2 Singapore Fax: ceeljy@nus.edu.sg Richard Liew is a Professor in the Department of Civil & Environmental Engineering at the National University of Singapore. He is a Chartered Engineer in UK, a Professional Engineer in Singapore, and a Chartered Professional Engineer of the Association of Southeast Asian Nations. He is a Fellow of the Academy of Engineering Singapore, an Honorary Fellow and the Past President of Singapore Structural Steel Society and Honorary Fellow of Hong Kong Institute of Steel Construction. He has been involved in research and practice in steel structures covering a wide spectrum of interests, including light weight and high strength materials and advanced analysis of structures subject to extreme loads. He has coauthored 6 books and generated more than 350 technical publications. He serves on the editorial boards of several international journals. He interacts closely with the industry in the Asia Pacific region serving as an expert and technical advisor and has been involved in numerous iconic steel projects. He chairs numerous committees related to standards and specifications of steel and composite structures. He is a key person responsible for the development of Singapore s codes related to steel and composite structures.