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通过对一榀几何比例为1∶3的两层单跨半刚性框架-无黏结十字加劲钢板剪力墙结构在低周往复水平荷载作用下的试验研究,得到了循环荷载下结构的滞回曲线及各关键部位的受力变形情况。分析其承载能力、破坏形式、耗能能力、刚度退化、承载力退化、延性等指标。在此基础上,分析了无黏结十字加劲内嵌钢板与半刚性框架的相互作用。结果表明:该结构具有良好的延性和耗能能力,安全储备高;半刚性框架与内嵌钢板协同工作良好;无黏结加劲构件的设计避免了焊缝的应力集中,降低了钢板墙在加工过程中对工艺的要求;加劲构件的设置改善了钢板墙的受力模式,提高了钢板墙体系的承载力及刚度,减轻了滞回曲线的“捏缩”现象。研究结果可为半刚性框架-无黏结十字加劲钢板剪力墙结构进一步的工程应用和理论研究提供参考。
Through the experimental study of a two-story single-span semi-rigid frame with 1: 3 geometric ratio of 1: 3, the cross-stiffened steel plate shear wall structure with low cyclic reciprocating horizontal load, the hysteretic curve of the structure under cyclic loading And the key parts of the force deformation. The bearing capacity, failure mode, energy consumption capacity, stiffness degradation, bearing capacity degradation, ductility and other indicators were analyzed. On this basis, the interaction between the non-bonded cross-stiffened inlay steel plate and the semi-rigid frame is analyzed. The results show that the structure has good ductility and energy dissipation capacity and high safety reserve. The semi-rigid frame cooperates well with the embedded steel plate. The design of the non-bonded stiffened component avoids the stress concentration of the weld and reduces the stress of the steel plate wall during the machining process In the process requirements; stiffened member arrangement improves the stress mode of the steel wall, improve the bearing capacity and stiffness of the steel wall system, reducing the hysteresis curve “pinch shrink ” phenomenon. The research results can provide reference for further engineering application and theoretical research of semi-rigid frame-unbonded cross stiffened steel plate shear wall structure.