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首页> 外文会议>Proceedings of the Thirteenth international conference on civil, structural and environmental engineering computing >Numerical Modelling of Extended Endplate Beam-to-Column Joints Subjected to Bending Moment and Axial Force
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Numerical Modelling of Extended Endplate Beam-to-Column Joints Subjected to Bending Moment and Axial Force

机译：弯矩和轴力作用下端板延伸的梁柱节点的数值模拟

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摘要

Structural joints play a key role in the global behaviour of steel structures.rnNumerous investigations have been made to understand the behaviour of a real jointrnand its influence over the portal frame global resistance. The Brazilian Steel DesignrnStandard, NBR 8800, considers that the behaviour of the joints is associated to twornextremes: rigid or flexible. However, some standards, such as Eurocode 3, considerrnthat the joints present an intermediate behaviour, in other words, semi-rigid andrnconsiders the presence of normal forces through an empirical limitation of 5% of thernbeam plastic resistance. Steel beam-to-column joints are often subjected to arncombination of bending and axial forces. Additionally, significant axial forces canrnalso be present in the joints in cases like that: pitched-roof portal frames, swayrnframes or frames with partially constructed floors. Despite this fact, only veryrnsimplified design procedures are available for the analysis and design of beam-tocolumnrnjoints under these actions. The main purpose of the present paper is torndescribe a numerical investigation developed to full characterize the structuralrnresponse of extended endplate beam-to-column joints subjected to bending and axialrnforces. The present study adopted the component method to model the semi-rigidrnjoints, in terms of their resistance and also to classify their performance according torntheir initial stiffness. The component method is based on mechanical models,rngenerated by a set of flexible and rigid components where each joint component isrnrepresented by a translational spring. Experimental results, carried out at thernUniversity of Coimbra, Portugal, were used to calibrate the finite element modelrnconsidering the geometrical and material nonlinearities. These analyses expandedrnthe test results and enable a better understanding of the structural behaviour of thisrnparticular type of semi-rigid joints.
机译：结构节理在钢结构的整体行为中起着关键作用。为了了解真实节理的行为及其对门框整体抗力的影响，人们进行了许多研究。巴西钢铁设计标准（NBR 8800）认为，接头的性能与两个极端有关：刚性或柔性。但是，某些标准（例如，欧洲规范3）认为接头具有中等性能，换句话说，半刚性并通过对梁塑性抗力的5％进行经验限制来考虑法向力的存在。钢制梁柱连接经常受到弯曲力和轴向力的双重作用。此外，在类似情况下，节理中还会出现明显的轴向力：斜屋顶的门框，防震框架或具有部分构造的地板的框架。尽管如此，在这些作用下，只有非常简化的设计程序可用于梁-柱节点的分析和设计。本文的主要目的是撕毁描述一项数值研究，以全面表征延伸的端板梁-柱节点在弯曲和轴向力作用下的结构响应。本研究采用构件法对半刚性接头进行了建模，根据其抗力，并根据其初始刚度对其性能进行了分类。构件方法基于机械模型，由一组柔性和刚性构件生成，其中每个关节构件均由平移弹簧表示。在葡萄牙科英布拉大学进行的实验结果被用来校准考虑几何和材料非线性的有限元模型。这些分析扩展了测试结果，并使人们能够更好地理解这种特殊类型的半刚性接头的结构行为。

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