考虑局部构造形式影响的焊接节点抗震性能分析

发布时间：2018-07-03 01:20

本文选题：钢结构焊接节点 + 局部构造形式　；参考：《工程力学》2014年10期

【摘要】：钢结构梁柱节点的局部构造形式对结构抗震性能影响显著,该文研究已有焊接节点构造形式的优缺点,依据等强设计原则,提出新型的节点构造形式。采用有限元软件ANSYS建立非线性有限元模型,考虑构件局部屈曲,对节点施加初始缺陷,并依据已有的钢框架焊接节点试验验证所建立有限元模型的准确性和适用性。对新型节点与标准节点、加强型节点和削弱型节点在承载力、断裂性能、滞回性能、退化特性、破坏形态以及累积损伤等方面进行对比分析,深入探讨新型构造形式节点的抗震性能。分析结果表明:新型节点在不改变节点刚度的情况下,能够实现塑性铰外移,且节点破坏形态与断裂性能滞回性能稳定,在断裂性能与累积损伤方面表现良好。
[Abstract]:The local structure of Liang Zhu joints of steel structures has a significant impact on the seismic performance of the structure. In this paper, the advantages and disadvantages of the existing welded joints are studied, and a new type of joint structure is proposed according to the principle of equal strength design. The nonlinear finite element model is established by ANSYS, which considers the local buckling of the members and imposes initial defects on the joints. The accuracy and applicability of the established finite element model are verified by the tests of welded joints of steel frames. A comparative analysis is made between the new joint and the standard joint, the strengthened joint and the weakened joint in the aspects of bearing capacity, fracture performance, hysteretic property, degradation characteristic, failure form and cumulative damage. The seismic behavior of new structural joints is discussed. The results show that the new joint can realize plastic hinge displacement without changing the stiffness of the joint, and the hysteretic behavior of joint failure and fracture performance is stable, and the joint has good performance in fracture performance and cumulative damage.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家科技支撑计划项目(2013BAJ08B03) 国家自然科学基金项目(50978218,51108376) 高等学校博士学科点专项科研基金项目(20106120110003) 陕西省科研项目(2012K12-03-01,2010JK633,2011KTCQ03-05)
【分类号】：TU391

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