郑山锁, 徐强, 田进, 韩言召, 孙乐彬. 考虑局部构造形式影响的焊接节点抗震性能分析[J]. 工程力学, 2014, 31(10): 136-142. DOI: 10.6052/j.issn.1000-4750.2013.04.0377
引用本文: 郑山锁, 徐强, 田进, 韩言召, 孙乐彬. 考虑局部构造形式影响的焊接节点抗震性能分析[J]. 工程力学, 2014, 31(10): 136-142. DOI: 10.6052/j.issn.1000-4750.2013.04.0377
ZHENG Shan-suo, XU Qiang, TIAN Jin, HAN Yan-zhao, SUN Le-bin. ANALYSIS OF SEISMIC BEHAVIOR OF WELDED CONNECTIONS CONSIDERING THE EFFECTS OF LOCAL STRUCTURAL FORM[J]. Engineering Mechanics, 2014, 31(10): 136-142. DOI: 10.6052/j.issn.1000-4750.2013.04.0377
Citation: ZHENG Shan-suo, XU Qiang, TIAN Jin, HAN Yan-zhao, SUN Le-bin. ANALYSIS OF SEISMIC BEHAVIOR OF WELDED CONNECTIONS CONSIDERING THE EFFECTS OF LOCAL STRUCTURAL FORM[J]. Engineering Mechanics, 2014, 31(10): 136-142. DOI: 10.6052/j.issn.1000-4750.2013.04.0377

考虑局部构造形式影响的焊接节点抗震性能分析

ANALYSIS OF SEISMIC BEHAVIOR OF WELDED CONNECTIONS CONSIDERING THE EFFECTS OF LOCAL STRUCTURAL FORM

  • 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 structural forms of beam-column joints in steel structures have a notable effect on seismic behavior of steel frames. A new connection form adhering to the equal strength design criterion is presented in this paper, on the basis of researching the advantages and disadvantages of commonly structural forms of welded connections. A nonlinear finite model was developed using the finite element software ANSYS, considering both the local buckling and initial imperfection of the connection, and then its accuracy and applicability were validated according to existing experiments on steel frame welded joints. The seismic behavior of new-form joint was investigated in detail based on a comparative analysis between the new connection, the standard joint, the reinforced joint and the reduced beam section connection, including the following criteria: bearing capacity, fracture property, hysteretic behavior, degradation characteristics, failure mode, and accumulative damage. The analytical results show that the new proposed connection can move the plastic hinge outward from the joint zone without decreasing its stiffness. Moreover, it has a stable failure mode and hysteretic behavior and good performance in dealing with fracture and accumulated damage.

     

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