Structural Engineering and Mechanics

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Seismic performance evaluation of mid-rise shear walls: experiments and analysis

  • Parulekar, Y.M. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Reddy, G.R. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Singh, R.K. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Gopalkrishnan, N. (Structural Engineering Research Centre) ;
  • Ramarao, G.V. (Structural Engineering Research Centre)
  • Received : 2015.10.08
  • Accepted : 2016.05.17
  • Published : 2016.07.25
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Abstract

Seismic performance evaluation of shear wall is essential as it is the major lateral load resisting member of a structure. The ultimate load and ultimate drift of the shear wall are the two most important parameters which need to be assessed experimentally and verified analytically. This paper comprises the results of monotonic tests, quasi-static cyclic tests and shake-table tests carried out on a midrise shear wall. The shear wall considered for the study is 1:5 scaled model of the shear wall of the internal structure of a reactor building. The analytical simulation of these tests is carried out using micro and macro modeling of the shear wall. This paper mainly consists of modification in the hysteretic macro model, developed for RC structural walls by Lestuzzi and Badoux in 2003. This modification is made by considering the stiffness degradation effect observed from the tests carried out and this modified model is then used for nonlinear dynamic analysis of the shear wall. The outcome of the paper gives the variation of the capacity, the failure patterns and the performance levels of the shear walls in all three types of tests. The change in the stiffness and the damping of the wall due to increased damage and cracking when subjected to seismic excitation is also highlighted in the paper.

Keywords

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