Cyclic behaviour of bolted cold-formed steel moment connections: FE modelling including slip
Cyclic behaviour of bolted cold-formed steel moment connections: FE modelling including slip
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DOI：
10.1016/j.jcsr.2012.09.010
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发表时间：
2013-01-01
影响因子：
4.1
通讯作者：
Mirghaderi, Rasoul
中科院分区：
文献类型：
--
作者：
Sabbagh, Alireza Bagheri;Petkovski, Mihail;Mirghaderi, Rasoul
本文介绍了一种用于模拟螺栓连接冷弯薄壁型钢节点的滞回弯矩-转动性能和破坏变形的有限元程序。对螺栓联接的响应建模的主要挑战之一是螺栓滑移的存在。进行了一系列由CFS曲翼梁、支撑柱和贯通板组成的6个梁柱组合在反复荷载作用下的试验。节点的弯矩-转角性能主要由梁中的弯曲或节点中的螺栓滑移控制。本文提出的有限元模型综合了梁的几何缺陷、拉伸试件获得的材料特性和螺栓滑移来处理这两种类型的行为。修正后的有限元模型能够准确预测以梁的受弯性能为主的节点的滞回弯矩-转角性能。简化的循环滑移模型允许在指定的折减抗滑荷载下滑移，较好地模拟了以螺栓滑移为主的节点的滞回性能。利用修正后的有限元模型，模拟得到的节点失效模式与试验结果吻合较好。(C)2012爱思唯尔有限公司。保留所有权利。
In this paper a Finite Element (FE) procedure is described for simulating hysteretic moment-rotation behaviour and failure deformations of bolted cold-formed steel (CFS) moment connections. One of the main challenges in modelling the response of bolted connections is the presence of bolt slip. A series of six beam-column assemblies comprising CFS curved flange beams, a support column and a through plate were tested under cyclic loading. The moment-rotation behaviour of the connections was dominated either by flexure in the beams or by bolt slip in the connections. FE models presented in this paper incorporate geometrical imperfections of the beams, material properties obtained from tensile coupon tests and bolt slip to address these two types of behaviour. The updated FE models result in an accurate prediction of the hysteretic moment-rotation behaviour of the connections dominated by a flexural behaviour in the beams. A simplified cyclic slip model which allows slip at a specified reduced slip resistance load simulates reasonably well the hysteretic behaviour of connections dominated by bolt slip. Using the updated FE model, the failure modes of the connections predicted by the simulations also agree well with those observed in the experiments. (C) 2012 Elsevier Ltd. All rights reserved.