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变内力杆件平面外计算长度系数的研究
Authors
付占明
栗增欣
赵振佳
郭成喜
Publication date
1 January 2009
Publisher
Editorial Department of Progress in Steel Building Structures, Tongji University
Abstract
工字形和T形截面的变内力杆件在桁架中经常出现,如何确定其平面外的计算长度系数,现行规范中无明文规定。因此分析和研究变内力杆件的平面外计算长度系数,具有重要的工程意义。本文利用ANSYS对工字形和T形截面变内力杆件的计算长度系数进行了分析,研究表明:采用工字形和T形截面时变内力杆件的计算长度系数μy几乎相等,可以利用μy计算T形截面变内力杆件的μyz;根据计算长度系数μy随参数η和ξ的变化趋势,拟合得出简化计算公式,并提出了考虑扭转效应的μyz的计算公式
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Last time updated on 28/12/2024