Finite Element Analysis on Seismic Performance of Buckling-Restrained Butterfly-Shaped Steel Plate Wall
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摘要: 提出了一种利用槽钢整体屈曲约束的两边连接防屈曲蝴蝶形钢板墙,该墙体为主体结构提供一定抗侧刚度的同时也优化了结构的耗能性能。介绍了该新型防屈曲蝴蝶形钢板墙的构造和工作原理。采用有限元软件ABAQUS对该结构进行低周往复加载,对比理论分析验证了模拟的可靠性,进而系统地分析了屈曲约束蝴蝶形钢板墙滞回曲线、骨架曲线、刚度退化曲线、延性和耗能性能,并且对比了施加不同屈曲约束方式的钢板墙的滞回性能。结果表明:防屈曲蝴蝶形钢板墙能够有效提高蝴蝶板的整体稳定性、延性和耗能性能;当蝴蝶带参数宽厚比(b/t)、蝴蝶带高度与钢板墙高度比(L/h)减小时,初始弹性刚度和承载力不断增加,滞回曲线趋于饱满,耗能能力逐渐增强。Abstract: A novel buckling-restrained butterfly-shaped steel plate wall that restrict the overall buckling by channel steel was proposed, which can provide certain lateral stiffness together with improving the energy dissipation capacity for the structure. The configuration and principle of buckling-restrained butterfly-shaped steel plate wall were presented. The finite element software ABAQUS performed a numerical simulation analysis on the butterfly-shaped steel plate wall under quasi-static loading and calibrated by theoretical lateral stiffness. Then, the parametric studies were carried out to inspect the hysteretic curves, load-displacement curves, stiffness degradation curves, ductility and energy dissipation of the structure and the effects of the buckling-restrained methods were also compared. The results showed that overall stability, ductility and energy dissipation of the buckling-restrained butterfly-shaped steel plate wall could be enhanced; when the ratio of width to thickness of butterfly link (b/t) and ratio of butterfly link height to steel plate wall thickness (L/h) declined, the bearing capacity and stiffness both increased, accompanied with a fuller hysteretic curves and enhanced energy dissipation capacity.
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Key words:
- buckling-restrained /
- steel plate wall /
- butterfly link /
- finite element /
- energy dissipation
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