钢框架弱轴梁端翼缘侧板加强式节点滞回性能有限元分析

发布时间：2018-01-12 06:13

本文关键词：钢框架弱轴梁端翼缘侧板加强式节点滞回性能有限元分析　出处：《西安建筑科技大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：钢框架梁端翼缘侧板加强式节点旨在改善梁柱节点的抗震性能.本文基于新型节点域箱形加强式工字形柱弱轴连接的研究成果,提出梯形侧板加强式节点的滞回性能研究.利用有限元软件对此类节点进行低周反复荷载作用下的有限元变参模拟分析,研究梯形侧板长度、宽度及坡度对该类节点力学性能的影响.研究结果表明:梯形侧板加强式节点均在距蒙皮板约2/3梁高处梁全截面发生明显的屈曲变形,形成明显的塑性铰并有效外移.节点域处应力较小且形状保持完好,具有"强节点域"特征.侧板长度对节点的抗弯能力有明显的影响,坡度主要影响延性及塑性变形能力,而侧板宽度对节点的滞回性能影响相对不明显.建议侧板长度取梁高的0.6~0.75倍,坡度取1∶2~1∶3.
[Abstract]:The purpose of this paper is to improve the seismic performance of Liang Zhu joints. This paper is based on the research results of a new type of box reinforced I-shaped column weak axis connection. The hysteretic behavior of trapezoidal side plate reinforced joints is studied. The length of trapezoid side plate is studied by using finite element software to simulate the parameters of such joints under low cyclic cyclic loading. The effect of width and slope on the mechanical properties of this kind of joints. The results show that the trapezoidal side plate reinforced joints have obvious buckling deformation in the full section of beam at the height of about 2/3 beams from the sheathed plate. The plastic hinge is formed and effectively moved out. The stress in the joint region is small and the shape remains intact, which has the characteristic of "strong joint domain". The length of the side plate has obvious influence on the bending resistance of the joint. The slope mainly affects ductility and plastic deformation ability, while the width of side plate has little effect on hysteretic performance of joints. It is suggested that the length of side plate should be 0.6 ~ 0.75 times of beam height, and the slope should be 1: 2 / 1: 3.
【作者单位】：长安大学建筑工程学院;富力海洋欢乐世界开发有限公司;
【基金】：国家自然科学基金项目(51278061) 中央高校基本科研业务费-长安大学优秀博士学位论文培育资助项目(310828175002)
【分类号】：TU391
【正文快照】： 自从美国北岭地震和日本阪神地震后,众多学者将研究方向转移至梁柱连接节点上[1-2].钢框架梁端翼缘扩大型节点通过加大梁端翼缘截面,增加梁柱连接处的抗弯能力,使梁端焊缝区应力小于非焊接区,致塑性铰在距离柱表面一定距离形成,进而达到塑性铰外移的目的[3].目前,国内外学者针

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