预制墙板内现浇自密实混凝土叠合剪力墙抗震性能试验研究

通过5片预制普通混凝土(NC)墙板内现浇自密实混凝土(SCC) 叠合剪力墙试件，2片预制普通混凝土墙板内现浇普通混凝土叠合剪力墙试件的低周反复荷载试验，研究在不同墙体边缘构件约束形式、轴压比以及保温层设置与否等条件下，预制墙板内现浇SCC叠合剪力墙的抗震性能，分析现浇SCC与预制墙板叠合剪力墙受力全过程，以及承载能力、破坏形态、滞回曲线、骨架曲线、刚度退化曲线、延性性能、耗能能力等，并将现浇SCC与现浇NC两种叠合剪力墙进行对比。分析结果表明：现浇SCC与预制墙板叠合剪力墙具有较好的抗震性能；两侧预制墙板之间的桁架钢筋起着良好连接作用，使预制加现浇的叠合墙体能整体协同受力；预制墙板内现浇SCC叠合剪力墙承载力不低于预制墙板内现浇NC叠合剪力墙；两者的受力性能、破坏形态及裂缝分布基本相同，滞回曲线、耗能能力、刚度退化等指标接近；预制墙板内现浇SCC叠合剪力墙的延性好于预制墙板内现浇NC叠合剪力墙；轴压比从0.1增加到0.2，有利于改善叠合墙体承载力；与不设置边缘构件叠合剪力墙相比，边缘构件采用暗柱形式的叠合剪力墙整体工作性能增强。

Experimental study on seismic behavior of SCC and precast NC composite shear wall

With quasi-static tests, the seismic performance of five precast NC composite shear walls infilling SCC and two precast NC composite shear walls infilling NC were studied. The effects of wall boundary element, axial compression ratio, and insulating layer were considered. The bearing capacity, failure pattern, hysteretic loops, skeleton curves, rigidity degradation curves, ductility and energy dissipation of precast NC composite shear walls infilling SCC were investigated. The two types of composite shear wall were compared infilling SCC and NC. The results indicate that the precast composite shear walls infilling SCC have good seismic behavior. The prefabricated parts and the cast-in-place SCC parts of the composite shear walls with steel support can work together in coordination very well under loading. The carrying capacity of composite shear wall infilling SCC is not lower than that infilling NC. The failure mode, crack distribution, hysteretic curve, energy dissipation capacity and stiffness degradation for two types of composite shear wall are similar. The ductility of the precast composite shear walls infilling SCC is a little better than the precast composite shear walls infilling NC. Increasing axial compression ratio from 0.1 to 0.2 will help improving the carrying capacity of walls. Using the embedded column will improve the whole performance of the precast composite shear walls infilling SCC.