武汉中心伸臂桁架-核心筒剪力墙节点抗震性能试验研究

结合武汉中心超高层结构设计，对伸臂桁架-核心筒剪力墙节点进行拟静力试验。节点按构造分为钢板外包式和钢板内嵌式两种，通过对两类试件进行低周往复试验，对节点的承载力、刚度、延性和耗能能力进行分析，结果表明，试验采用的两种不同构造形式的伸臂桁架-核心筒剪力墙节点均具有良好的承载能力、延性和耗能能力，抗震性能优越。同时，对两种节点构造从施工工艺、破坏模式及混凝土裂缝开展情况等方面进行对比，结果表明，外包钢板构造优于内嵌钢板构造，其施工更为便捷，稳定承载力更高，混凝土剪力墙裂缝较少。本文研究成果为武汉中心超高层建筑结构加强层设计提供重要依据，可为伸臂桁架-核心筒剪力墙节点在超高层建筑结构中的应用提供参考。

Experimental research on seismic behavior of outrigger truss-wall joint in super high-rise building of Wuhan Center

The experimental research was conducted on the seismic behavior of outrigger truss-wall joints, in order to support the design of super high-rise building of Wuhan Center. The strength, stiffness, ductility and energy dissipation capacity were evaluated based on the results of quasi-static cyclic loading tests on two specimens with different joint details. The satisfying seismic behavior of the two joints with different details was verified by the test results. Furthermore, the construction convenience, failure modes and cracking patterns were compared between the two joints. It can be found that the joint with outside steel plate is better than that with encased steel plate with more construction convenience, higher buckling load and less concrete cracks. The strengthened stories of Wuhan Center can be designed based on the test results. Conclusions drawn from this research are useful for the application of outrigger truss-wall joints in super high-rise buildings.