Experimental study on seismic performance of high-efficiency prefabricated reinforced concrete shear wall
The use of a large number of small-diameter vertically connected steel bars in the edge components of prefabricated shear walls generally results in multiple sleeves,difficulty in aligning the steel bars and on-site grouting,large labor and time consumption and difficulty in automated production of manual processing and binding of hoops.To solve the problem,an efficient prefabricated shear wall construction form was proposed in this paper,which used large-diameter steel bars and large-diameter sleeves to connect the edge components of shear walls,and continuous spiral square hoops to construct the stirrups.Three full-scale assembled shear wall specimens with a design axial compression ratio of 0.2,one with a design axial compression ratio of 0.6,and two with a design axial compression ratio of 0.4 were tested under quasi-static loading to study the seismic performance of the shear walls,and the test parameters included axial compression ratio,longitudinal reinforcement connection form of edge components,and stirrup reinforcement construction form.The results show that all six shear walls fail in the expected bending mode.The measured bending bearing capacity of shear walls is 1.03-1.15 times of the calculated value,indicating a certain degree of safety redundancy.The ultimate displacement angle of the shear wall is 1/77-1/42,which is greater than the limit value of 1/120 given by the GB 50011-2010'Code for seismic design of buildings'for the elastic-plastic inter story displacement angle of the shear wall structure under rare earthquakes,demonstrating its good deformation capacity.The proposed prefabricated shear wall construction connection scheme is reasonable and reliable,which not only ensures the bearing capacity and seismic performance of the shear wall,but also reduces the construction cost by 8％to 18％compared to traditional connection schemes.
国家科技期刊平台
NSTL
万方数据
