采用高强度螺栓连接的全装配式钢-混凝土组合剪力墙结构抗震性能及设计方法研究

The research on prefabricated structrues is the strategic demand to improve the integration level of construction industrialization in China. This project proposes a totally prefabricated steel-concrete composite shear wall structure assembled using high strength bolt, which is characterized by combining the assembling scheme of the precast shear wall together with the promotion of the structural seismic behavior. And then the seimic behavior and design method of the structure are studied. The key of this research project lies in the following two points. First, via controlling the the coordination of the working stage between the horizontal connection and the precast wall panel, the contradiction between the demands of large stiffness of the structure under common earthquake and large deformability of the structure under rare earthquake will be solved. Second, via controlling the relative stiffness-strength ratios between the steel frame and the precast wall panel, the vertical steel frame will be designed to slow down the decline of the structure bearing capacity after the degration of the precast wall panel and serve as the second seismic fortification line to enhance the structural ductility. In particular, the shear behavior of steel-cocnrete unit assembled using high strength bolt, the mechanical behavior of horizontal and vertical connections, the mechanical behavior and seismic behavior of totally precast shear wall incorporating horizontal or vertical connections, together with the seismic behavior of the totally precast steel-concrete composite shear wall unit will be researched in depth. On this basis, the seismic behavior indexes and integrated design method will be put forward. This research project will undoubtedly provide the application of the totally precast steel-concrete composite shear wall system with theoretical basis and scientific basis.

预制装配式结构的研究是提高我国建筑工业化技术集成水平的战略需求。本项目将预制墙板的连接方案与结构抗震性能的改善结合起来，提出采用高强度螺栓连接的全装配式钢-混凝土组合剪力墙结构，对其抗震性能和设计方法展开研究。本项目研究的关键在于：通过控制水平接缝与预制墙板工作阶段的协调关系，解决结构在多遇地震下应具有较大刚度、罕遇地震下宜具有较强变形能力的矛盾；通过控制钢框与预制墙板的刚强比，使钢框在剪力墙承载力退化后起到减缓结构承载力下降、增强结构延性、形成二道抗震防线的作用。本项目拟对高强度螺栓连接钢-混凝土组合件的受剪性能、水平/竖向接缝的受力性能、含水平/竖向接缝全装配式剪力墙的受力性能和抗震性能、全装配式钢-混凝土组合剪力墙结构单元的抗震性能展开研究，最终提出该结构的抗震性能指标和综合设计方法。项目研究将为全装配式钢-混凝土组合剪力墙结构的应用提供理论基础与科学依据。

预制装配式混凝土结构是当前建筑发展的主要方向之一。本项目借鉴钢结构的连接方式，提出采用高强度螺栓连接的全装配式钢-混凝土组合剪力墙结构，对其受力性能和抗震性能开展了较系统的研究。对高强度螺栓连接钢-混凝土组合件的受剪性能进行了试验研究、数值模拟及理论分析，提出了组合件极限强度计算方法，建立了高强度螺栓连接钢-混凝土组合件剪力-位移关系模型。对含水平接缝全装配式剪力墙的受力性能与抗震性能进行了试验研究、数值模拟及理论分析，提示了水平接缝的工作机制，提出了含水平接缝全装配式剪力墙承载力计算方法。对含竖缝一字形全装配式剪力墙的受力性能进行了数值模拟、理论分析及参数分析，揭示了一字墙中竖向接缝的工作机制，提出了竖向接缝的设计方法。对含竖向接缝工字形全装配式剪力墙的受力性能与抗震性能进行了试验研究、数值模拟及理论分析，提示了竖向接缝的工作机制，提出了含竖缝工字形全装配式剪力墙极限抗剪抵抗机制。对带钢边柱一字形全预制装配式剪力墙结构单元的抗震性能进行了试验研究，对钢边柱与剪力墙之间的协同工作性能进行了分析，结果表明竖向连接件的滑移-顶紧机制可有效地提高墙体延性性能。本项目的研究为全装配式钢-混凝土组合剪力墙结构的应用提供了一定的理论基础与科学依据。