LOW-CYCLIC REVERSED LOADING TEST FOR DOUBLE-WALL PRECAST CONCRETE SHEAR WALLS

摘要

For a deeper understanding of the seismic resistance performance of the double-wall precast concrete shear wall(DWPC shear wall),three full scale specimens are tested and compared under low-cyclic reversed load,including two DWPC shear walls and one normal cast-in-situ shear wall.By observing their crack propagation,failure processes and failure modes and contrasting their hysteretic curves,skeleton curves,displacement ductility coefficients and energy dissipation capacity,the seismic resistance performance of DWPC shear wall was synthetically evaluated on aspects of strength,stiffness,ductility and energy dissipation.The test results have shown that,compared with cast-in-situ shear wall specimen,DWPC shear wall specimens have higher initial stiffness,the cracking loads increased by 42.8％to 57.1％(with an average of 50.0％),the yielding loads increased by 16.7％to 25.0％(with an average of 20.8％),and the ultimate loads increased by 17.7％to 28.5％(with an average of 23.1％).The displacement ductility ratios of DWPC shear wall specimens are no less than that of cast-in-situ shear wall specimen.The hysteretic curves of three specimens are plump,and the trend of skeleton curves is basically the same.The seismic energy dissipation capacities of DWPC specimens are close to those of cast-in-situ specimen.All the specimens have shown favorable seismic performance.DWPC shear wall can achieve similar carrying capacity,displacement ductility and seismic energy dissipation capacity to the cast-in-situ shear wall.