门式刚架端板连接节点承载性能的有限元分析

为提高门式刚架端板连接点的可靠性,基于有限元法,建立了螺栓预拉力的三维有限元模型,分析门式刚架端板连接Γ形梁柱节点的力学性能,得到不同端板厚度和节点构造形式。结果表明:端板竖放比端板横放节点有更高的承载能力和刚度,但端板竖放时对螺栓的受力及强度要求较高,对连接处的整体强度不利,易造成螺栓强度不足,故建议采用端板横放节点构造形式。该研究为门式钢架端板的工程应用提供了参考。

Finite element analysis of load capacity for endplate connection in door frame structure

This paper introduces the thickness of different endplates and the construction forms of joint required for improving the reliability of endplate connections with door frames. This improvement draws on the finite element method which leads to the development of a three-dimensional finite element model of the bolt pulling force by which to analyze the mechanical properties of the connection between endplates with door frames and Γ-shaped beam column joints. The paper concludes that an endplate connection has a higher bearing capacity and stiffness if an endplate is arranged in a vertical form than if it is arranged in transverse form,but an endplate,if arranged in a vertical form,imposes a greater force and strength on bolt,a condition unfavorable to the overall strength of the joints and more likely to give the insufficient bolt strength,thus making advisable the construction forms of joint of transverse endplate. This research may serve as references for the engineering application of endplates with door frames.