新型钢-混凝土组合联肢剪力墙结构力学行为及抗震设计理论

A new type of steel-concrete composite coupled wall structure, which is composed of steel plate-concrete composite shear walls and replaceable steel coupling beams, is proposed and systematic investigation on its mechanical behavior and seismic design theory will be carried out. Experimental study of double skin steel plate composite shear walls will be carried out to investigate the effect of different parameters to the seismic performance of specimens. The calculation method of strength, stiffness and deformation of composite shear walls will be proposed. Experimental study of concrete-incased steel plate composite shear walls and double skin steel plate composite shear walls will be carried out to study the shear mechanism of composite shear walls and the calculation method of shear strength will be proposed. The technique of replaceable steel coupling beams after damage will be developed and experimental study of assemblages with replaceable steel coupling beams and composite shear walls will be carried out to investigate the effect of coupling beam details to the mechanical behavior and deformation composition of specimens. Experimental study of the new type of steel-concrete composite coupled wall structures will also be carried out to investigate the variation of seismic performance of specimens before and after rehabilitation with the replaceable technique of steel coupling beams. Pseudo-dynamic experiment of the new type of steel-concrete composite coupled wall structures will be carried out to investigate the dynamic response characteristics, failure mechanisms, degradation of strength and stiffness, variations of seismic performance of specimens before and after rehabilitation. The seismic design method of the new type of steel-concrete composite coupled wall structure, which can be referenced for the engineering practice of such strctures, will be eventually established.

提出一种由钢板-混凝土组合剪力墙和可替换钢连梁组成的新型钢-混凝土组合联肢剪力墙结构，围绕其力学行为和抗震设计理论开展系统研究。主要包括：进行外包式钢板-混凝土组合剪力墙抗震性能试验，研究不同参数试件的受力机理和抗震性能，提出试件强度、刚度、变形的计算方法。进行内藏式和外包式钢板-混凝土组合剪力墙抗剪性能试验，研究不同参数剪力墙的受剪机理并提出抗剪强度计算方法。研发钢连梁震损可替换技术并进行钢连梁-组合剪力墙组合件抗震性能试验，研究不同连梁构造对组合件受力性能和变形组成的影响。进行新型钢-混凝土组合联肢剪力墙结构抗震性能试验，研究损伤修复前后结构抗震性能的变化。进行新型钢-混凝土组合联肢剪力墙结构拟动力试验，研究结构的动力响应规律、破坏机制和强度刚度退化规律以及损伤修复前后结构动力特性的变化。最终提出新型钢-混凝土组合联肢剪力墙结构的抗震设计方法，为该类结构的设计和工程应用提供科学依据。

提出一种由钢板-混凝土组合剪力墙和可替换钢连梁组成的新型钢-混凝土混合联肢剪力墙结构，围绕其力学行为和抗震设计理论开展系统研究。主要开展的工作有：(1) 完成了6个大比例钢板混凝土组合剪力墙试件的抗剪性能试验，研究剪跨比和钢板厚度对试件抗剪性能的影响。通过试验研究和有限元分析，提出钢板混凝土组合剪力墙抗剪承载力修正计算方法；(2) 完成了5个1/2缩尺的钢连梁-钢板混凝土组合剪力墙组合件低周往复加载试验，研究跨高比和加劲肋构造对试件抗震性能的影响；(3) 完成了4个可替换钢连梁-钢板混凝土组合剪力墙组合件低周往复加载试验，研究可替换构造的可行性及其对试件抗震性能的影响；(4) 完成了4个大比例的钢板-混凝土组合连梁低周往复加载试验，研究连梁形式、纵筋配筋率和配板形式对试件抗震性能的的影响；(5) 提出一种新型复合PBL剪力键，完成了6个试件的单调推出试验，通过试验和有限元模拟对剪力键抗剪机理进行分析，并提出抗剪承载力计算方法。研究成果可为新型钢-混凝土混合联肢剪力墙结构的设计计算提供科学依据，促进该新型结构的推广应用。