加劲板连接双层钢板混凝土剪力墙滞回性能分析-hysteretic behavior analysis of double-layer steel plate concrete shear wall with stiffened plates.docxVIP

摘要加劲板连接双层钢板混凝土剪力墙是一种新型结构形式的组合剪力墙，它是将混 凝土内填于加劲板连接的双层钢板中，形成抗剪强度极高的双层钢板混凝土剪力墙结 构。双层钢板在混凝土浇筑过程中起到了模板作用，施工方便，内填的混凝土能有效 的阻止钢板屈曲，钢板间的加劲板能有效地阻止钢板向外鼓曲，钢和混凝土两种材料 的优势得到了充分发挥。本文采用有限元分析软件 ABAQUS 建立加劲板连接双层钢板混凝土剪力墙的有 限元模型，系统研究组合剪力墙的静力性能和滞回性能，主要研究内容和相关结论如 下：1.跨高比、两侧钢板厚度和内填混凝土板厚度对组合剪力墙抗剪承载能力的影 响。随着跨高比、两侧钢板厚度和内填混凝土板厚度的增加，组合剪力墙的抗剪承载 能力均有显著增加。2.组合剪力墙在达到极限抗剪承载能力之后，曲线出现小幅度下降段，然后进入 弹塑性状态，保持较高的承载力，表现出很好的延性。3.跨高比、两侧钢板厚度和内填混凝土板厚对组合剪力墙滞回性能的影响，包括 对滞回曲线、骨架曲线、耗能、延性和刚度的影响。随着跨高比、两侧钢板厚度和内 填混凝土板厚度的增加，组合剪力墙的滞回性能均有显著增加。4.组合剪力墙的滞回曲线没有捏缩现象，相当饱满，表明组合剪力墙在循环往复 荷载作用下，能够吸收较多的能量。5.组合剪力墙的滞回曲线饱满，没有捏缩现象，表明耗能性能良好；骨架曲线与 单调加载的曲线近似形同；耗能系数均较大，均大于 3，表明组合剪力墙的耗能性能 高；延性较高，刚度退化后期较为稳定，表明其具有良好的抗侧能力。关键词：组合剪力墙，抗剪静力性能，滞回性能，耗能性能，延性AbstractBi-steel-plate concrete shear wall connected by stiffened plates is a new type of composite shear wall. The concrete is filled in the bi-steel-plate shear wall connected by stiffened plates, which is forming high shear strength structural system. Bi-steel-plate shear wall connected by stiffened plates plays a role as moldboard, which is easy to construct. In this structure ,the stiffened plates and the inside concrete-plate can prevent the steel plates from buckling ,as a result ,the steel can exert its behavior of high strength.The ABAQUS finite element program is adopted to research the mechanical behaviors of the bi-steel-plate concrete shear wall connected by stiffened plates .The main contents are listed as follows:The span to depth ratio，steel plate thickness and built-in concrete slab thicknessplay important roles to the composite shear wall. With the span-to-depth ratio ,steel plate thickness and built-in concrete slab thickness increasing the shear carrying capacity grows obviously.Having researched the ultimate shear capacity, the composite shear wall only make a small decline ,and then into a plastic state with high capacity.The span to depth ratio，steel plate thickness and built-in concrete slab thicknessplay important roles to the composite shear wall hysteretic behavior including