Study On Seismic Behavior Of Section Steel Connected Prefabricated Concrete Shear Wall

This topic involves a kind of prefabricated concrete shear wall structure with vertical section steel connecting nodes,which include the upper and lower two shear walls,two shear walls are fixed connected by section steel,and ribbed steel plates are set on both sides of section steel webs.Purpose of this scheme is put forward a new type of dry type prefabricated concrete shear wall vertical connection nodes,completely solve the prefabricated vertical connection concrete shear wall wet homework problems,and resolve in the upper and lower two pieces of prefabricated concrete shear wall structure node link form a complex,difficult technical problems.Based on the pseudo-static loading test of a piece of ordinary cast-in-place reinforced concrete shear wall(CW)and two sections connected with prefabricated reinforced concrete shear wall(PW-1 and PW-2)at 0.1 and 0.3 axial compression ratios and the parameter analysis using ABAQUS finite element software,the following conclusions are drawn:(1)Under the axial compression ratio of 0.3,the peak bearing capacity of the specimens CW and PW-2 is 5.5% higher than that of the specimens CW.The horizontal joints of the sections steel joints used in shear wall specimens can improve the bearing capacity of the structure.The seismic performance indexes such as energy dissipation capacity,ductility,displacement Angle,energy dissipation efficiency and stiffness degradation are almost the same.(2)Compared with the specimen of PW-1,the ductility,displacement Angle,energy dissipation efficiency,stiffness degradation and other seismic performance indexes were improved and the peak bearing capacity was reduced under 0.1 axial pressure ratio.(3)Specimens PW-1 and PW-2 remain in the elastic stage from the elastic stage to the failure stage,and meet the seismic requirements of "strong joints and weak members".(4)In this paper,based on the influence of key parameters on the overall performance of the section steel-connected prefabricated concrete shear wall developed in THE PW-2specimen,the change rule of key parameters on the seismic performance of the section steel-connected prefabricated concrete shear wall is obtained,which provides the design basis for the section steel joints to be used in the prefabricated concrete shear wall.The results are as follows: with the increase of axial compression ratio,the yield load and peak load increase,but the yield displacement decreases,and the ductility decreases;with the increase of height width ratio,the slope and peak load of skeleton curve gradually decrease and stabilize,and the energy dissipation capacity also decreases step by step;with the increase of reinforcement ratio of concealed column,the overall seismic performance of steel reinforced concrete shear wall is improved;with the increase of steel reinforced concrete shear wall,the seismic performance of steel reinforced concrete shear wall is improved The closer the joint location is to the bottom of the shear wall,the higher the bearing capacity,and the greater the stiffness of the bottom of the shear wall,which improves the bearing capacity,but the ductility of the structure decreases,which is not conducive to earthquake resistance.