SEISMIC ANALYSIS OF RCC STRUCTURE WITH DIFFERENT TYPES OF BRACING SYSTEM

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1 International Journal of Civil Engineering and Technology (IJCIET) Volume 9, Issue 8, August 2018, pp , Article ID: IJCIET_09_08_047 Available online at ISSN Print: and ISSN Online: IAEME Publication Scopus Indexed SEISMIC ANALYSIS OF RCC STRUCTURE WITH DIFFERENT TYPES OF BRACING SYSTEM Kartik Prashar Postgraduate Student, Department of Civil Engineering, Chandigarh University, India Jagdeep Singh Gahir Assistant Professor, Department of Civil Engineering, Chandigarh University, India ABSTRACT Most of the reinforced concrete building failed due to earthquake strike at that region.so it is impotent to choose an effective lateral load resisting system.bracing system have significant effect on performance of the structure. In present study aim to evaluate the different types of system for 15 storey reinforced concrete building.the models were compared for different points within building such as maximum storey lateral displacement, Storey shear, storey drift and lateral load resisting capacity of building. The models were analyzed for seismic zone VI and medium condition soil as per IS 1893: 2002 with using of ETAB software. In this study the reinforced concrete building was identified and its seismic analysis and performance evolution was done with using of the ETAB software. The results of various system such as X, V, inverted and corner X systems were compared with bare frame model analysis by software to evaluate the performance of structure.also the analysis was done on lateral displacement, storey drift and member forces in the structure. It was found that all type of systems were able to control the lateral displacement and storey drift of the structure and increase the resistive capacity of the structure.all type of system were able to resist the seismic waves and horizontal load. However used X system found to be effective to reduced the lateral displacement. Analysis was done by the ETAB software. Key words: x, v, inverted system, corner X system, lateral displacement, storey drift, storey shear and lateral load carrying capacity of structure. Cite this Article: Kartik Prashar and Jagdeep Singh Gahir, Seismic Analysis of RCC Structure with Different Types of Bracing System. International Journal of Civil Engineering and Technology, 9(8), 2018, pp editor@iaeme.com

2 Seismic Analysis of RCC Structure with Different Types of Bracing System 1. INTRODUCION 1.1. General Seismic analysis is calculate the response of the structure by different methods. The seismic event which may be either natural or initiated by humans, which generates seismic waves used as the term of earthquake. About 90 % of all earthquake result from tectonics plates events, movements on the fault. The earthquake are caused by splitting of tectonic plate inside the earth crust but they can also generate other event like volcano activity, mine blast and landslides. Earth crust create the seismic waves which is also called tremor. Our earth has divide into different zones of earthquake seismic zone II, zone III, zone IV, zone V.The earth quake waves effect on our structure resistance.seismic waves are dynamic waves it continue strike on our earth surface.seismometer are used measure the seismic waves. The magnitude of seismic waves defines the seismic activity of that area. The earth magnitude more than five are mostly reported on the scale moment magnitude. Those magnitude smaller then five which are reported on the local observation scale or local magnitude scale The main reason of seismic inadequacies may be insufficient design loads, structural damage sustained in a previous earthquake, faulty design or construction, and changes in building occupancy 1.2. Strengthening to the Structure with Steel Bracing Steel are mostly used in the structure because they are light in weight, increase the seismic resistance of building, low cost and easy to erect in the building.it is most effective method to resist the seismic waves. Reinforced Concrete frames are the most common construction in India, with increasing numbers of high-rise building. There are many important Indian cities that comes under in highly active seismic zones IV and zone V. Such high-rise building, constructed especially in highly prone seismic zones, should be analyzed by the software and designed with full detailing and should be designed with extra lateral stiffening system to improve their seismic performance and reduce damages of the structure. Two of the most commonly used lateral stiffening systems that can be used in buildings to resist the deflections and storey drift. They are system and shear walls Different Types of Steel Bracing System X system V sytem Inverted V system K system Diagonal system 2. MODELING AND ANALYZING OF BUILDING The analyses of G+15 storey building by using of ETAB software for moment resisting frame situated in seismic zone IV.The RCC G+15 storey building with different types of system analyzed.lateral load displacement, storey drift,storey shear and lateral load carrying capacity compared for braced and un-braced structure editor@iaeme.com

3 Kartik Prashar and Jagdeep Singh Gahir Table 1 Specification of building No of stories G+15 Storey height (typical 3m floor ) Storey height (bottom 3.5m storey) Grade of concrete (beam M30 and column) Grade of concrete (slab ) M25 Thickness of slab 125mm Beam size 300*600 mm Column size 600*600mm Dead load 5Kn/m² Live load intensity 3Kn/m² Seismic zone IV Importance factor 1 Response reduction factor 5 Soil condition Medium soil Damping ratio 5% Nos of bays along X 6 direction Nos of bays along Y 6 direction One bay length along X 6m direction One bay length along Y 6m direction Wind load 40m/sec Zone factor 0.24 Importance factor I 1 Response reduction factor Structure Modelling and Analysis By ETAB Software Figure 1 Plan view of structure editor@iaeme.com

4 Seismic Analysis of RCC Structure with Different Types of Bracing System UNBRACED X BRACED V BRACED INVERTED BRACED Figure 2 CORNER X BRACING SYSTEM 2.2. Graphical Represented the Lateral Displacement, Storey Drift and Lateral of Different Bracing System Displacement Storey drift Lateral load Figure 3 X braced structure editor@iaeme.com

5 Kartik Prashar and Jagdeep Singh Gahir Displacement Storey drift Lateral load Figure 5 V braced system Displacement Storey drift Lateral load Figure 6 Inverted braced structure Displacement Storey drift Lateral load Figure 7 Corner X Braced Structure Table 1 Comparison on lateral displacement(mm) of braced structure with bare frame Storey number Without With X V system With inverted X at corner Base editor@iaeme.com

6 Seismic Analysis of RCC Structure with Different Types of Bracing System This table1 shown that the use of reduces maximum lateral load displacement to great extent.the X system reduce the lateral load displacement.the lateral displacement reduce by about 50% in cross when it compared to the un-braced structure which in turn reduces the storey drift.this table shown the different of the structure have high impact on the lateral load, storey drift,stiffness and load carrying capacity of the structure. By the response spectrum method we can calculate the lateral load displacement of more than 30 storey building.x proved best in all the different types of. Table 2 Comparison of storey drift for various types of in structure Storey number Without With X With V With inverted With corner X Base Table 3 Comparison of the lateral load capacity (KN) of different system Storey number Without with X With v with inverted With corner X , Base Table3 shows the comparison of lateral load carrying capacity for different types of system in structure. It is evident from this table that use of increase the lateral load carrying capacity of the structure. The maximum lateral load that this structure could resist is obtained in X system editor@iaeme.com

7 Kartik Prashar and Jagdeep Singh Gahir ETAB Analysis of Structure with X Barcing Steel Section ISMC 300 AND ISMC 200 Table 4 Comparison of lateral displacement(mm) of X steel section ISMC 300 and ISMC 200 Number of stories Bare frame ISMC 300 X ISMC 200 X Base It is evident the table 4 that use the different types of system in the structure reduce the maximum lateral displacement of the structure to great extent. AS we use the X in the structure with different types of steel section ISMC 300 and ISMC 200,the lateral displacement reduced in both the steel section,however maximum lateral displacement reduced in ISMC 300 steel section 2.3. Result It is evident from this research work involving ETAB analysis that steel system increase the lateral load resisting capacity of the building.it reduce the lateral displacement and storey drift of high rise building. This is a effective retrofitting technique to resist the seismic forces. 3. CONCLUSIONS Steel system is an efficient retrofitting system for structure in seismic zone area. Out of different types of system X, V Inverted and corner system, X came out to be most effective system.x increase the lateral load capacity of the structure X also reduce the lateral displacement and storey drift produced due to seismic waves. Different section ISMC 300 and ISMC 200. But ISMC 300 was found better in resisting lateral load when compared to the ISMC 200 X steel section REFERENCES [1] Rishi Mishra, Dr Abhay Sharma,and Dr Vivel garg, Analysis of RC building frame for seismic forces using different types of systems, International Journal of engineering research & technology (IJERT) vol. 3, Issue 7,July 2014,ISSN [2] Nauman Mohammed and Islam Nazrul Behavior of Multistory RCC Structure with Different Type of Bracing System, IJIRSET, Vol. 2 Issue 12, Dec 2013,ISSN editor@iaeme.com

8 Seismic Analysis of RCC Structure with Different Types of Bracing System [3] Prof.Bhosle Ashwini Tanaji and Prof.Shaikh A.N Analysis of Reinforced concrete Building with Different Arrangement of Concrete and Steel Bracing system, Journal of Mechanical and Civil Engineering Vol.12 Issue 5, Sep 2015,PP [4] Shachindra Kumar Chadhar and Dr. Abhay Sharma Seismic Behavior of RC Building Frame with Steel Bracing System using various Arrangements International Research Journal of Engineering and Technology Vol.02,Issue 5, Aug-2015, ISSN [5] S. Velmurugan, B. Preethiwini and A.Nisha Devi Behavior and Model of Earthquake Resistant Structure using Steel Bracing International Journal of Engineering Research and Modern Education Special Issue, April, Page Number ,2017,ISSN [6] Youssef M. A., Ghaffarzadeh H. and Nehdi M. Seismic performance of RC frames with concentric internal steel, Eng. Struct., 29, , 2007 [7] Patil S.S., Aland S.S., Kore P.N. "Seismic Response of Concentrically Braced Reinforced Concrete Frames", International Journal of Scientific and Engineering Research, Volume 4, Issue7, July 2013 Edition [8] Manjunath C S and Siddu karthik C S Seismic Performance of RC Building on Sloping Ground with Different Types of Bracing System International Journal of Research in Engineering and Technology, Vol.5,Issue2, Feb 2016,ISSN [9] Surrender Kumar,Hakam Singh and R.S Bharj A Seismic study of Steel Braced RC Frame with different Arrangements International Journal of Research in Management,Science &Technology,Vol.5,No.1,Pages 1-6,April 2017,ISSN [10] A Kadid1, D.Yahiaoui Department of Architecture, LARHYA, University of Batna, Algeria. Seismic Assessment of Braced RC Frame: science direct, Procedia Engineering 14 (2011) editor@iaeme.com