工字形等截面悬臂横梁弯扭失稳问题解析解研究  

Analytical Analysis of Flexural-torsional Instability Problem of I-shaped Constant-section Cantilever Horizontal Beam

作　　者：姚君芳[1] 罗劲松 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300142 [2]中国土木工程集团有限公司,北京100038

出　　处：《建材世界》2010年第4期64-66,共3页The World of Building Materials

摘　　要：推导了工字形等截面(双轴对称等截面和单轴对称等截面)悬臂横梁的弯扭失稳问题的解析解,与有限元程序ANSYS得到的数据进行对比,验证了推导解析公式的有效性。研究结果表明:对于双轴对称工字形等截面悬臂横梁,解析公式与ANSYS数值分析结果吻合较好,对于单轴对称截面则相对误差较大,分析了产生误差的原因。Through the analytical analysis of flexural-torsional instability problem of I-shaped constant-section（double symmetrical constant section and mono-symmetrical constant section） cantilever horizontal beam,the effectiveness of the formulas deduced by author is verified.The results show that,the formulas agree well with the ANSYS results for I-shaped double symmetrical constant section cantilever horizontal beam,but have big relative error for mono-symmetrical constant section.The error generation causes are analyzed.

关 键 词：双轴对称 单轴对称 稳定 弯扭失稳 临界荷载 

分 类 号：TU392.1[建筑科学—结构工程]