[1]梁刚,郭宏超,刘云贺,等.考虑力组合效应的钢框架端板连接力学行为[J].地震工程与工程振动,2019,39(01):096-105.[doi:10.13197/j.eeev.2019.01.96.liangg.012]
 LIANG Gang,GUO Hongchao,LIU Yunhe,et al.Mechanical behavior of steel frame end-plate connections considering force combination effect[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2019,39(01):096-105.[doi:10.13197/j.eeev.2019.01.96.liangg.012]
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考虑力组合效应的钢框架端板连接力学行为
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《地震工程与工程振动》[ISSN:/CN:]

卷:
39
期数:
2019年01
页码:
096-105
栏目:
论文
出版日期:
2019-02-28

文章信息/Info

Title:
Mechanical behavior of steel frame end-plate connections considering force combination effect
作者:
梁刚12 郭宏超12 刘云贺12 杨迪雄12
1. 西安理工大学 土木建筑工程学院, 陕西 西安 710048;
2. 省部共建西北旱区生态水利国家重点实验室(西安理工大学), 陕西 西安 710048
Author(s):
LIANG Gang12 GUO Hongchao12 LIU Yunhe12 YANG Dixiong12
1. School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China;
2. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China(Xi’an University of Technology), Xi’an 710048, China
关键词:
钢结构平齐端板连接高强钢有限元方法力学性能破坏模式弯矩和轴力
Keywords:
steel structuresflush end-plate connectionhigh strength steel (HSS)finite element method (FEM)mechanical propertyfailure modebending moment and axial force
分类号:
TU391
DOI:
10.13197/j.eeev.2019.01.96.liangg.012
摘要:
为研究不同力组合效应对平齐端板连接力学行为的影响,采用ABAQUS程序建立不同受力情况下连接的非线性简化有限元模型,通过与国内外典型试验结果对比分析,验证了有限元模型的可靠性。基于此通过考虑8种力组合因素的影响,分析了2种不同钢等级的梁柱节点力学行为,进一步讨论了EC3 Part 1-8规范的适用性。结果表明:简化有限元模型在弯矩-转角曲线、破坏形态、初始刚度和塑性抗力等方面与试验结果吻合良好。框架梁轴力对节点的力学行为影响显著,当轴拉力为20%的框架梁轴向塑性抗力Npl时,高强钢节点的刚度和强度分别降低68%和52%;当轴压力为-20% Npl时,刚度和强度分别增加89%和42%。此外节点的滞回耗能能力、破坏模式以及分类属性与梁轴力水平密切相关。对于高强钢梁柱平齐端板节点,EC3规范对框架梁轴压力的限值仍过于保守。研究结果对于提高结构的抗倒塌能力和组合力作用下的理论研究具有重要参考价值。
Abstract:
In order to study the influence of the different force combination effect on the mechanical behavior of flush end-plate connection. Non-linear simplified finite element models of the connection were developed using ABAQUS under the different forced cases, and proved to be correct and applicable compared with typical test results at home and abroad. Based on the finite element model, the mechanical behavior of the flush end-plate connection with two steel grades were analysed by considering the eight force combination effects. In addition, the effectiveness of EC3 Part 1-8 was discussed. The analytical results reveal that the simplified finite element model agrees well with the experimental results in terms of moment rotation curve, failure modes, initial stiffness and plastic resistance. The presence of an axial force on the beam significantly affect the connection behavior, when +20% of the beam plastic resistance (Npl) is applied to the beam, the initial stiffness and strength of the specimens using HSS decrease by 68% and 52% respectively, and of the specimens increased by 89% and 42% respectively when it is-20% Npl. Furthermore, energy dissipation capacity, failure mode and classification properties of the joints are closely related to the level of axial force on the beam. For the flush end-plate connection using HSS, the EC3 method is too conservative in the cases of compression force. The research result makes a certain contribution in improving the anti-collapse capabilities and theoretical researches for steel structure under the combined forces.

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备注/Memo

备注/Memo:
收稿日期:2018-03-20;改回日期:2018-06-15。
基金项目:国家自然科学基金项目(51308454);中国博士后科学基金项目(2013M542371);西安理工大学科技新星项目
作者简介:梁刚(1987-),男,博士研究生,主要从事高强钢结构方面研究.E-mail:lg20854007@163.com
通讯作者:刘云贺。E-mail:liuyunhe1968@163.com
更新日期/Last Update: 1900-01-01