装配式摇摆墙-框架结构抗震性能试验研究

为避免罕遇地震作用下传统混凝土摇摆墙的开裂损伤且充分利用装配式结构的便捷性，设计了采用双层钢板混凝土墙的摇摆墙结构体系，在浇筑混凝土时双层钢板可充当摇摆墙构件的外模板。跨越结构上、下层的摇摆墙之间采用高强螺栓连接，摇摆墙在工厂预制后运到施工现场进行安装。选用金属阻尼器作为耗能连接件连接摇摆墙与主体框架结构，同时传递层剪力并耗散地震能量。为研究该装配式摇摆墙-框架结构的抗震性能，设计并制作了一个纯框架和两个摇摆墙-框架，其中两个摇摆墙-框架的区别在于金属阻尼器的安装位置不同。通过拟静力试验分析了其破坏模式及抗震性能。试验结果表明：预制装配式摇摆墙与主体框架结构协同工作性能良好，金属阻尼器耗能效果得到充分利用，结构承载力、耗能能力大幅增加；在水平位移较大时摇摆墙竖向发生刚体位移，对整体结构的抗震性能产生一定影响，后续将采用附加预应力的形式减轻摇摆墙竖向抬升的影响。

Experimental study on seismic performance of prefabricated rocking wall frame structure

In order to avoid cracking damage of traditional concrete rocking walls under rare earthquakes and make full use of the convenience of prefabricated structure, a rocking wall structure system using double steel plate concrete wall was designed in this study. The double steel plates can be used as the formwork when pouring concrete for construction of the rocking walls. High-strength bolts were used to connect the rocking walls across the upper and lower floors of the structure. The rocking walls can be precast in the factory and transported to the construction site for installation. Metallic dampers were adopted as energy dissipation connections to connect the rocking walls and main frame structure. Then the story shear force can be transferred to the walls and the earthquake energy can be dissipated. One reinforced concrete (RC) frame specimen and two rocking wall frame specimens were designed and constructed to study the seismic performance of the proposed prefabricated rocking wall frame structures, where the installation positions of metallic dampers were different for the two rocking wall frame specimens. Quasi-static tests were employed to investigate the failure mode and seismic performance of the specimens. It is demonstrated that the rocking walls and the main frame are capable of working coordinately. The metallic dampers are effective in energy dissipation and the bearing capacity and energy dissipation capacity of the structures increase obviously. However, the rocking walls suffer rigid-body displacements in the vertical direction during the tests under large horizontal deformations and the seismic performance of the structure is partly affected. Additional prestress will be included to reduce the effects induced from the vertical lift of rocking walls in future studies.