端部连接约束对钢梁弯曲稳定性的影响

IF 1.7 3区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Advanced Steel Construction Pub Date : 2008-09-01 DOI:10.18057/ijasc.2008.4.3.6

S. Amara, D. Kerdal, J. Jaspart

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引用次数: 5

摘要

采用有限元法详细研究了端部约束条件对梁侧扭屈曲的影响。本文着重讨论了欧洲规范3对端部支承侧弯和扭转约束系数kz和kθ的限制。分别给出了考虑支承处小轴弯曲约束和端部扭转约束的系数kz和kθ的理论表达式。建议在弹性临界弯矩表达式中引入新的代表实际支承条件的系数zk和kθ。将有限元法得到的不同梁截面、长度和不同端部约束下的弹性临界矩与引入z k和kθ系数的EC3 ENV法得到的弹性临界矩进行比较，证实了这些系数对端部支撑条件的可靠性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effect of end connection restraints on the stability of steel beams in bending

The influence of the end restraint conditions on the lateral-torsional buckling of beams is investigated in detail using finite element method. The paper focuses on the limitation of Eurocode 3 regarding the lateral bending and torsional restraint coefficients kz and kθ of the end supports. Theoretical expressions of the coefficients kz and kθ taking into account the minor axis flexural restraint at the support and the end torsional restraint respectively are presented. The introduction of new coefficients z k and kθ representing the actual support conditions in the expression of the elastic critical moment is suggested. A comparison between the elastic critical moments for various beam cross-sections, lengths and various end restraints, obtained from the finite-element method, and those derived from EC3 ENV method, in which the proposed coefficients z k and kθ are introduced, confirms the reliability of these coefficients that model the end support conditions.

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来源期刊

Advanced Steel Construction CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

2.60

自引率

29.40%

发文量

审稿时长

6 months

期刊介绍： The International Journal of Advanced Steel Construction provides a platform for the publication and rapid dissemination of original and up-to-date research and technological developments in steel construction, design and analysis. Scope of research papers published in this journal includes but is not limited to theoretical and experimental research on elements, assemblages, systems, material, design philosophy and codification, standards, fabrication, projects of innovative nature and computer techniques. The journal is specifically tailored to channel the exchange of technological know-how between researchers and practitioners. Contributions from all aspects related to the recent developments of advanced steel construction are welcome.