Seismic Performance Experimental Research And Numerical Analysis On New Precast Concrete Shear Wall With Horizontal Seam

Fabricated concrete structure is an important development direction of the construction industry,and the fabricated shear wall structure has become the focus of the academic and engineering circles.In order to further analyze and study the seismic performance of a new type of concrete shear wall with horizontal joints,a quasi-static loading test of 4 feet full-scale concrete shear wall under cyclic loading is carried out.The influence of the key parameters such as the diameter of the steel bar,the number of the reserved holes and the number of the reserved holes on the seismic performance and the basic mechanical properties of the assembled wall are analyzed.Meanwhile,the failure characteristics,bearing capacity,stiffness degradation,deformation,ductility and energy dissipation of different walls are compared and analyzed.And other seismic performance indicators,from the test data analysis of new assembly shear wall in the practical process of the feasibility of the application.In this paper,the following research results are obtained through relevant experimental research and finite element analysis:(1)The overall shear resistance of wall PW1 and PW2 is better than that of traditional cast-in wall XJ1,and the bearing capacity of wall PW1 and PW2 is higher than that of wall XJ1,PW1.And the hysteresis curve of PW2 is relatively full,showing "S" type.The fullness of hysteresis curve of wall XJ1 is worse than that of PW1,and the latter is faster and the energy dissipation capacity is lower;PW2 slightly stronger,and wall PW3 is less energy-consuming.(2)The initial rigidity of the cast-in wall XJ1 is larger than that of the new wall PW1 ~ PW3,and the degradation curve of the newly assembled wall decreases rapidly at the initial stage of loading,and the descending trend of the wall stiffness decreases;PW3 relative to the PW1 initial stiffness has increased,but the increase is not significant,indicating that the middle through the bars on the wall energy dissipation less effective.(3)The failure mechanism of PW1 and PW2 is similar,the failure mechanism of the two kinds of walls is the yield of the vertical through bars,the wall welded steel plate is not yielded,the vertical through bars and the welded steel plates have better coordination in the loading process Work performance;wall PW3 wall welded steel plate first yield failure,the vertical through the tendons did not yield,the overall occurrence of shear slip damage,vertical through bars and welded steel plate work poor performance,damage to the overall structure of the seismic performance of adverse.(4)The finite element model of wall PW1 is analyzed by ABAQUS.The results of model calculation and experiment are compared with those of failure characteristics,skeleton curve and bearing capacity.The calculated results are in good agreement with the experimental results,which can effectively simulate the new assembly The results show that the model is a relatively accurate and effective calculation model.