Experimental Study And Numerical Simulation Of Shear Wall Subjected To Earthquake

The application of high-rise shear wall structure is more and more extensive.The failure of high-rise shear wall structure under earthquake shows that it is necessary to deeply study its seismic response law and put forward targeted improvement measures.Limited to the test method,the existing research fixes the top of the two walls of the coupled shear wall on a rigid block to exert horizontal displacement and rotation angle,but in fact the top of the two walls are not in the same plane.In this paper,select the polyurethane material to make the wall section of the coupled shear wall,two sets of LBCF loading devices are used,and the horizontal displacement,the rotation angle and the superposition of the two shear walls are applied to the top of the two wall limbs,so as to simulate the seismic response of the combined shear wall to show the distribution of the strain space,provides a basis for taking energy dissipation and strengthening measures.The main results of the study are as follows.1.Through the comparison and selection,the reinforced concrete is simulated by using the polyurethane material to make the wall section of the double-limb shear wall,and on the LBCF,the real deformation of the wall limb under the action of the earthquake is simulated.The results show that the material selection and loading device are feasible.2.The displacement and strain responses of the wall limb and the coupling beam are obtained by applying translation,rotation angle and their combination to the two wall limbs of the coupled shear wall by using two sets of the same LBCF loading device.The strain field caused by each loading is consistent with the theoretical deduction.3.The strain field of the wall limb and the coupling beam clearly shows the strain concentration of the coupling shear wall under earthquake,in which the bottom edge of the wall limb is highly concentrated,and even the upper and lower surface strain of the beam end is also concentrated.4.The strain distribution of wall limb and coupling beam,especially the strain concentration,is in good agreement with the numerical simulation results.The test and analysis results have important guiding significance for how to install coupling beam dampers and how to strengthen the bottom edge of wall limbs.