短肢多腔钢混凝土组合剪力墙性能与设计

钢筋混凝土短肢剪力墙以截面形式多样、设置部位灵活、承载方式与空间使用能巧妙结合等优势，在高层建筑中被大量采用。本项目针对传统钢筋混凝土短肢剪力墙承载力和抗震性能方面的弱点，提出了一种由多腔钢管和混凝土组成的新型 “短肢多腔钢混凝土组合剪力墙”，这种新型短肢组合剪力墙继承了钢筋混凝土短肢剪力墙的优点，通过多腔钢管与混凝土的组合作用克服了钢筋混凝土短肢剪力墙的缺点，在外荷载作用下表现出良好的承载、耗能和变形性能；多腔钢管还可作为施工时的承载骨架和混凝土模板，使施工便捷。本项目主要研究工程上常用的L形、T形短肢多腔组合剪力墙，研究其在轴压和压弯荷载作用下的性能，并考虑扭转等诸多因素的影响；研究短肢多腔组合剪力墙的滞回性能；本项目研究将深入揭示短肢多腔组合剪力墙的工作机理，得到其轴压、压弯和抗剪承载力以及抗震性能指标的计算方法和设计方法，给出考虑不同抗震等级的钢板宽厚比限值、构件的合理轴压比。

Reinforced Concrete Short-legged Shear Walls (RCSSW) have been used widely in high-rise buildings in China, with their distinctive advantages such as various cross-sectional shapes, flexible positioning, and beautiful combination of both load bearing and space planning requirements. In order to improve RCSSW bearing capacity and earthquake resistance performance, this application proposes a new type of shear wall, which is composed of multi-partition hollow steel sections filled with concrete and named “Short-legged Multi-partition Steel-concrete Composite Shear Wall (SMSCSW)”. Maintaining the features of RCSSW, the new SMSCSW can achieve a higher bearing capacity, better energy absorption and deformation ability through the composite action between multi-partition steel tubes and in-filled concrete. Moreover the multi-partition steel tubes can also be used as load bearing members and concrete forms in the process of construction, which provides great convenience to the site work. This research focuses on L-shape and T-shape short-legged multi-partition composite shear walls. Their mechanical behavior under axial compression, combined compression and bending, hysteretic loadings will be extensively investigated. The related affecting factors including torsion will also be considered. This research will reveal the fundamental working mechanism of SMSCSW, and will obtain the calculation methods and then design methods for SMSCSW under compression, combined compression and bending, shear and hysteretic loadings. Furthermore, the maximum width-to-thickness ratio of multi-partition tubes, and appropriate axial load ratio under different aseismic levels will also be proposed.