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工程力学  2013 

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

DOI: 10.6052/j.issn.1000-4750.2012.04.0223, PP. 180-186

Keywords: 冷弯薄壁型钢结构房屋,弹塑性位移,位移增大系数,简化计算,恢复力模型

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Abstract:

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。

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