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考虑悬链线效应的约束钢梁在分布荷载作用下的性能(Ⅱ)——数值算例验证 被引量:13

A study of restrained steel beams with catenary action under distributed load——PartⅡ: numerical verification
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摘要 另一篇系列文章已经采用约束系数方法和刚塑性铰模型推导了同时承受轴向弹簧和转动弹簧约束的钢梁在分布荷载作用下的荷载-跨中挠度曲线计算公式。本文采用大型通用有限元软件ABAQUS6.7对承受均布荷载的两个工字型截面钢梁进行有限元分析,研究它们在不同大小的轴向弹簧约束与转动弹簧约束情况下的跨中挠度。将公式计算结果与有限元分析结果进行对比证明了系列文章推导过程和计算公式的可靠性。在对比结果的基础上进行误差分析,根据误差原因进行公式修正,使修正后的公式与真实结果更加吻合,提高了公式的准确性。 In the companion paper,formulas of distributed load and mid-span deflection of restrained steel beams were derived using restraint coefficient method and rigid-plastic mechanism.Finite element analysis is carried out using software ABQUS6.7 for two I-sections steel beams under distributed load,with different axial restrictions and rotational restrictions.The accuracy of the formulas is analyzed by comparison between the results of the formulas and FEM,and the formulas were improved based on the analysis.
出处 《土木工程学报》 EI CSCD 北大核心 2010年第1期8-12,共5页 China Civil Engineering Journal
基金 国家自然科学基金创新研究群体项目"土木工程防灾"(50621062) 国家科技支撑计划项目"高性能建筑结构设计关键技术研究"(2006BAJ01B02)
关键词 数值分析 公式修正 误差分析 numerical analysis formula improvement inaccuracy analysis
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  • 1Yin Y Z, Wang Y C. Analysis of catenary action in steel beams using a simplified hand calculation method, Part 1 : theory and validation for uniform temperature distribution [J]. Journal of Constructional Steel Research. 2005, 61 (2) :183-211.
  • 2Yin Y Z, Wang Y C. Analysis of catenary action in steel beams using a simplified hand calculation method, Part 2: validation for non-uniform temperature distribution [ J ]. Journal of Constructional Steel Research, 2005, 61 ( 2 ) : 213-234.
  • 3Izzuddin B A. A simplified model for axially restrained beams subject to extreme loading [ J]. International Journal of Steel Structures, 2005, (5) :421-429.
  • 4Izzuddin B A, Vlassis A G, Elahazouli A Y, et al. Progressive collapse of multi-storey buildings due to sudden column loss, Part I : simplified assessment framework [ J ]. Engineering Structures, 2007,35 ( 5 ) : 1308-1318.
  • 5Izzuddin B A, Vlassis A G, Elqhazouli A Y, et al. Assessment of progressive collapse in multi-story buildings [C]//Proceedings of the Institution of Civil Engineers: Structures and Buildings. Thomas Telford Services Ltd. , 2007 : 197-205.
  • 6李国强,王开强,杨涛春.考虑悬链线效应的约束钢梁在分布荷载作用下的性能(Ⅱ)——数值算例验证[J].土木工程学报,2010,43(1):8-12. 被引量:13

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