International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
SEISMIC ANALYSIS OF MULTISTOREY STRUCTURE Mohd Ashraf Dar1, Rizwanullah2 1M-Tech
(Structure and Foundation Engineering), 2Assistant Professor Department of Civil Engineering, Al-Falah University, Faridabad, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract - The seismic design of buildings is continuing to evolve. Traditional design methods have the objective of achieving life safety in a building by providing sufficient strength and ductility to resist total and/or partial collapse. In this proposed study G+14 Two Building With And Without Shear Wall model is generated & tested by the ETABS under the guideline of IS-875-Part3 & IS1893- 2002Part1.And we find Base shear, Displacement, Seismic analysis , Storey drift, stiffness dynamic story shear is less than static story shear for all cases From all cases, it is concluded that lateral force obtained from response spectrum method is higher than those obtained by equivalent static lateral force method for story one up to five and the rest higher stories have less values.The maximum story displacement, overturning moment obtained from response spectrum method is lesser than those obtained by equivalent static lateral force method. The base shear, lateral force, story shear, maximum story displacement and overturning moment are increased.in both directions (i.e., X & Y) as the seismic zone goes from II to V for the same frame type building in both methods.
analyses to have a more reasonable and economical design. In this paper, we introduce the reinforced concrete tower, located in high seismic zone. Having a general overview of the case, some especial aspects of the tower, and the assessment of its seismic load bearing system with considering some important factors will be discussed.Shear walls are vertical elements of the horizontal force resisting system. Shear walls are like vertically-oriented wide beams that carry earthquake loads transfers to the foundation. Shear wall system is often used for resisting the lateral forces caused by seismic excitation, because of their high stiffness and strength. 1.1 MODEL CONFIGURATION Fifteen story regular reinforced concrete building is considered. The beam length in (x) transverse direction are 6m longitudinal direction are 6m. Figure 1.1 shows the plan and 3D view of the fifteen story building without shear wall having seven bays in x-direction and seven bays in y-direction. Story height of each story is assumed 3m. Figure 1.2 shows plan and the 3D view of the fifteen story RC building i.e building 2(with shearwall).Beam cross sectionis 450x600 mm and Column cross section is 750x750 mm.
KeyWords: Stiffness,Response sprctrum,Dynamic analysis, Etab,Story Drift 1.INTRODUCTION In many respects concrete is an ideal building material, combining economy, versatility of form and function, and noteworthy resistance to fire and the ravages of time. The raw materials are available in practically every country, and the manufacturing of cement is relatively simple. It is little wonder that in this century it has become a universal building material. Tall buildings are the most complex built structures since there are many conflicting requirements and complex building systems to integrate. Today’s tall buildings are becoming more and more slender, leading to the possibility of more sway in comparison with earlier high-rise buildings. Thus the impact of wind and seismic forces acting on them becomes an important aspect of the design. Improving the structural systems of tall buildings can control their dynamic response. With more appropriate structural forms such as shear walls and tube structures, and improved material properties, the maximum height of concrete buildings has soared in recent decades. Therefore; the time dependency of concrete has become another important factor that should be considered in
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