K型偏心支撑钢框架的地震反应分析
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摘要
偏心支撑结构弹性阶段刚度大,塑性阶段耗能能力强,是适用于高烈度地震区的一种有效的抗侧力结构体系。采用梁单元与壳单元相结合的非线性有限元模型,对K型偏心支撑钢框架进行弹塑性时程分析,研究耗能梁段的长度、腹板高厚比和加劲肋间距的变化对K型偏心支撑钢框架结构抗震性能的影响,提出了相应的抗震设计建议。
The paper demonstrates that high elastic stiffness and excellent energy dissipation of eccentrically-braced steel frame is a lateral load-resisting system applied to the building in the high intensity area.The nonlinear finite element model is stimulated by the combination of the shell element and beam element to make elastic-plastic time history analysis on the K-eccentrically braced steel frames.The paper also investigates the influence of different parameters such as the length of link beam and height-to-thickness ratio of web,as well as the distance of the links stiffness on the seismic behavior of K-eccentrically braced steel frame under the rare earthquake action.Some suggestions are acquired for the structural seismic design.
引文
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