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首页> 外文会议>Structural Stability Research Council 2002 Annual Stability Conference; Apr 24-27, 2002; Seattle, Washington >POST-BUCKLING BEHAVIOR, IMPERFECTION-SENSITIVITY AND MODE INTERACTION IN PITCHED-ROOF STEEL FRAMES
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POST-BUCKLING BEHAVIOR, IMPERFECTION-SENSITIVITY AND MODE INTERACTION IN PITCHED-ROOF STEEL FRAMES

机译：节距型钢框架的屈曲后行为，不精确度和模态相互作用

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摘要

After briefly reviewing a few aspects concerning the buckling behavior and design of pitched-roof plane steel frames, the paper presents and discusses the results of an investigation dealing with the post-buckling behavior, imperfection-sensitivity and mode interaction in such portal frames. These results, obtained by means of an asymptotic-numerical method (perfect frames) or FEM analyses performed using the program ABAQUS (imperfect frames), include (ⅰ) the post-buckling behavior and imperfection-sensitivity of pitched-roof frames bifurcating in buckling modes with anti-symmetric (AS) and symmetric (S) shapes, and (ⅱ) the influence of AS-S mode interaction on the structural behavior of frames with coincident bifurcation loads. In particular, the issues addressed include (ⅰ) assessing the influence of the rafter compression level and column base stiffness on the AS and S post-buckling behavior and imperfection-sensitivity and (ⅱ) identifying the most detrimental frame imperfection configuration under AS-S mode coupling.
机译：在简要回顾了有关斜屋顶平面钢框架的屈曲行为和设计的几个方面之后，本文提出并讨论了研究此类门户框架中屈曲后行为，缺陷-敏感性和模态相互作用的研究结果。通过渐进数值方法（完美框架）或使用程序ABAQUS执行的FEM分析（不完美框架）获得的这些结果包括（include）屈曲分叉的斜屋顶框架的屈曲后行为和不完美敏感性具有反对称（AS）和对称（S）形状的模态，以及（ⅱ）AS-S模式交互作用对分叉重合的框架结构行为的影响。尤其要解决的问题包括（ⅰ）评估the架压缩水平和柱基刚度对AS和S屈曲后行为和缺陷敏感性的影响，以及（ⅱ）确定AS-S下最有害的框架缺陷配置模式耦合。

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