DYNAMIC RESPONSE ANALYSIS OF COLD-FORMED THIN-WALLED STEEL HOUSING BASED ON DIAPHRAGM EFFECT
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摘要: 结合实际工程建立5组两层冷弯薄壁型钢住宅结构有限元模型,通过大型有限元软件ANSYS分别对5组结构进行模态求解,研究结构在开洞及有围护墙板时对其固有频率的影响。输入8度地震波进行结构动力响应分析,得到结构瞬态位移曲线,计算5组结构在8度多遇地震作用下各弹性层间位移角。研究表明:开洞使结构的整体抗侧刚度降低,在没有墙面板时,冷弯薄壁纯钢骨架在8度多遇地震作用下不能满足第一水准设防目标;墙面板能起到很好的蒙皮效应,可以有效提高结构整体刚度,控制结构位移;OSB板作为墙面板时具有很好的抗震性能,可为农村冷弯薄壁型钢房屋结构设计提供参考。Abstract: Five groups of FE models for two-story of cold-formed thin-walled steel housing were built by combining with the practical projects. The large finite element software ANSYS,it was used to analysed 5 groups of structure models,and also study the openning and retaining wall effects on the natural frequency of the whole structure. The 8degrees seismic waves were input to analyse time history,and the transient displacement curve was got,elastic angular displacement between the layers under the action of 8 degrees common earthquake was calculated. Research showed that the openning reduced the whole lateral stiffness of the structure,the cold-formed thin-walled steel frame without wallboard could not meet the first level fortification goal under the effect of 8 degrees common earthquake.Wallboard had a good skin effect to the whole structure,which could effectively improve the integral rigidity and control displacement of structure. OSB board as wallboard had a good seismic behavior,which provided the reference for the design of rural cold-formed thin-walled steel building structure.
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