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地震作用下冷弯薄壁型钢结构房屋弹塑性位移简化计算研究

SIMPLIFIED CALCULATION OF ELASTOPLASTIC DISPLACEMENT FOR COLD-FORMED THIN-WALLED STEEL BUILDINGS UNDER EARTHQUAKES

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【作者】 吴函恒周天华石宇陈军武

【Author】 WU Han-heng1,ZHOU Tian-hua1,SHI Yu1,CHEN Jun-wu1,2(1.School of Civil Engineering,Chang’an University,Xi’an 710061,China;2.Xi’an Research Institute of Nonferrous Metallurgy,Xi’an 710001,China)

【机构】 长安大学建筑工程学院西安有色冶金设计研究院

【摘要】 针对地震作用下冷弯薄壁型钢结构房屋弹塑性位移的简化计算,基于层间剪切模型和冷弯薄壁型钢组合墙体的恢复力模型,对2层~7层冷弯薄壁型钢结构房屋进行弹塑性时程分析。通过对滞回耗能沿楼层高度分布规律的研究,确定了冷弯薄壁型钢结构房屋薄弱楼层的位置;研究了楼层屈服剪力系数、楼层数、结构自振周期和不同地震记录对弹塑性层间位移增大系数的影响;通过大量参数统计分析,提出了冷弯薄壁型钢结构房屋弹塑性层间位移增大系数与楼层屈服剪力系数和楼层数的定量关系,为罕遇地震作用下冷弯薄壁型钢结构房屋弹塑性位移验算提供依据。

【Abstract】 Based on a shearing storey model and a hysteretic model of cold-formed thin-walled steel stud walls,the simplified calculation of the elastoplastic displacement for cold-formed thin-walled steel buildings is studied by the elastoplastic time history analysis on two-storey buildings to seven-storey buildings.The weak storey is suggested by analyzing the distribution of hysteretic energy in the height of a storey.The influences of storey yielding shear force factors,storey numbers,fundamental periods of structures and different seismic records on elastoplastic displacement amplification factors are studied.The quantitative relations among storey yielding shear force factors,storey numbers and elastoplastic displacement amplification factors are proposed to estimate the elastoplastic displacement for cold-formed thin-walled steel buildings under rare earthquakes.

【基金】 中央高校基本科研业务费专项资金项目(CHD2012TD012)
  • 【文献出处】 工程力学 ,Engineering Mechanics , 编辑部邮箱 ,2013年07期
  • 【分类号】TU392.5
  • 【被引频次】6
  • 【下载频次】178
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