Experimental Study And Numerical Simulation Analysis On Seismic Performance Of Precast Reinforced Concrete Shear Wall

With the development of housing industrialization in our country, the precaststructure is widely used increasingly. Our research group carried out a series of studieson the assembly shear wall, this paper relies on the National Natural ScienceFoundation of China Youth Science Fund Project (Research on the performance anddesign method of semi-precast reinforced concrete shear wall structure:50908071) andmakes researches on the test and numerical analysis of precast shear wall structures.This paper carried out the test of six liner shear walls (two pieces of whole cast andfour pieces of precast superimposed slab shear walls) and two pieces of superimposedslab shear walls with strong connection, three pieces of self-centering shear walls, andcompares the failure modes and the hysteresis curves of these shear walls withself-centering shear walls. The author also simulates these shear walls using thenonlinear finite element analysis software OpenSees, and compares the simulationresults with the experimental results.The results show that the hysteresis loop shape of the precast superimposed slab shearwall is closed to the one of the totally cast shear wall with little difference under thesame axial compression ratio. The plastic part of superimposed slab shear wall can bemoved from horizontal joint to the internal part of the wallboard and the joint bar stresstransfers well when the area of joint bar is sufficient in the foundation. The advantagesof self-centering shear wall are obvious under big earthquake: fewer wall cracks, strongdeformation ability, small residual deformation and strong earthquake recovery ability.Being based on the modified Kent-Park constitutive model of concrete and the steelmodel of Steel02can simulate the mechanical properties and hysteretic characteristicsof the three types of assembled shear walls above well under the action of the low cyclicreversed loading, OpenSees is able to simulate the reaction of the precast shear wallwell under the low cyclic reversed loading.