带垫板的双肢冷弯C型钢框架抗震性能研究

发布时间：2018-05-07 08:56

本文选题：双肢冷弯C型钢 + 框架　；参考：《工程力学》2017年02期

【摘要】：针对带垫板的双肢冷弯C型钢框架抗震性能问题,选取垫板厚度、框架跨度、C型钢厚度、C型钢翼缘宽厚比和C型钢腹板高厚比等作为研究参数,采用拟静力试验和有限元方法分析了14个单层单跨框架,得到了该类框架的滞回曲线和骨架曲线,分析了框架的破坏模式和抗震性能。结果表明:框架先发生梁端和柱脚的局部屈曲,最终平面内失稳破坏。垫板厚度在保证强节点的前提下,对框架的承载力和抗震性能影响很小。C型钢截面参数变大可以提高框架承载力,增加C型钢厚度可以提高框架延性。该类框架的承载力退化稳定,具有较好的延性和耗能能力,抗震性能好。建议设计框架梁柱线刚度比不宜低于0.4。
[Abstract]:Aiming at the seismic behavior of cold formed C section steel frame with two legs with cushion plate, the thickness of frame span C section steel and the ratio of width to thickness of flange of C section steel and the ratio of height to thickness of C section steel web plate are selected as the research parameters. The hysteretic curves and skeleton curves of 14 single-story single-span frames were analyzed by quasi-static test and finite element method. The failure mode and seismic behavior of the frames were analyzed. The results show that the local buckling of the beam end and column foot occurs first, and finally the instability in the plane is destroyed. The bearing capacity and ductility of the frame can be improved by increasing the section parameters of C section steel and increasing the thickness of C section steel, while the thickness of cushion plate can guarantee the strong joint, and the influence on the bearing capacity and seismic performance of the frame is very small. The bearing capacity of this kind of frame is stable, ductility and energy dissipation, and seismic performance is good. It is suggested that the line stiffness ratio of Liang Zhu should not be lower than 0.4.
【作者单位】：内蒙古科技大学建筑与土木工程学院;
【基金】：国家自然科学基金项目(51368043) 内蒙古科技大学创新基金项目(2016YQL10)
【分类号】：TU391;TU352.11

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