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首页> 外文会议>Structural Stability Research Council Annual Stability Conference; 20070418-21; New Orleans,LA(US) >OUT-OF-PLANE INSTABILITY CONSIDERING FRAME-MEMBER INTERACTION
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OUT-OF-PLANE INSTABILITY CONSIDERING FRAME-MEMBER INTERACTION

机译：考虑框架成员相互作用的面外不稳定

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摘要

Design standards for steel structures have adopted requirements for non-linear (second-order) analyses of steel frames during design. The interaction of the members and the resulting effect on the mutual restraint of members for lateral torsional buckling is one aspect of frame behaviour that must be considered, and this may not be considered in the analyses required. The interaction of the members is dependent on the connections between members, and the restraint these provide to the members. Attention is especially given to the compatibility of torsional warping deformations of the members and joint using simplified joint details. This paper presents results of numerical analyses of steel frames considering out-of-plane stability, using finite element analysis with beam elements including warping capability. These elements have been selected as their use is more efficient for the designer, both in terms of model assembly and solution time, when compared to the use of continuum elements, such as "brick" or "shell" elements. The effect of considering the warping continuity is to increase the stiffness of the frame and, consequently, the strength of the frame. As current analysis and design practices ignore this strength contribution, we may enjoy some extra capacity in frames designed with current methods.
机译：钢结构设计标准已采纳了在设计过程中对钢框架进行非线性（二次）分析的要求。构件的相互作用以及由此产生的对横向扭转屈曲构件相互约束的影响是必须考虑的框架行为的一个方面，而在所需的分析中可能没有考虑。成员之间的相互作用取决于成员之间的联系，以及这些成员对成员的约束。使用简化的接头细节尤其要注意构件和接头的扭转翘曲变形的兼容性。本文介绍了考虑面外稳定性的钢框架的数值分析结果，并使用了包含翘曲能力的梁单元进行了有限元分析。选择这些元素是因为与使用连续元素（例如“砖”或“壳”元素）相比，它们在模型组装和求解时间方面对设计人员而言更加有效。考虑翘曲连续性的作用是增加框架的刚度，从而增加框架的强度。由于当前的分析和设计实践忽略了这种强度贡献，因此在使用当前方法设计的框架中，我们可能会享有一些额外的功能。

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