钢管混凝土柱-钢梁平齐端板连接节点抗倒塌性能试验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (20) : 121-127.

论文

徐嫚1，高山2,3，郭兰慧4

作者信息 +

Experimental study on anti-collapse behavior of CFST column-steel beam joint using flush endplates

XU Man1，GAO Shan2,3，GUO Lanhui4

Author information +

文章历史 +

摘要

为解决传统螺栓连接钢管混凝土柱-钢梁节点构造复杂、承载力和刚度偏低的问题，本文设计了三个采用穿心螺栓的钢管混凝土柱-钢梁平齐式端板连接节点，并对其进行了中柱失效下的抗倒塌性能试验研究，分析了节点中抗弯机制和悬索机制的形成与发展，对节点的抗倒塌转动能力进行了评价以及等效动力分析，主要结论如下：采用穿心螺栓和平齐式端板的钢管混凝土柱-钢梁节点具有较好的抗倒塌能力，端板厚度和螺栓直径的匹配程度会影响抗弯机制和悬索机制的过渡。提出一种新的节点抗倒塌转动能力需求计算公式，可以较好体现节点细部构造对其转动性能的影响。DoD规范中给出的动力放大系数计算公式在抗弯机制下可以有效地体现节点的动力效应，但无法考虑悬索机制的影响。

Abstract

In order to improve the performance of traditional bolted CSFT column-steel beam joints, three CFST column-steel beam joints with flush endplate and long bolts were designed and tested in the scenario of column removal. The formation and development of bending mechanism and catenary mechanism in the joints were analyzed. Based on DoD standard, the anti-collapse rotation capacity of the specimens were evaluated. In addition, an equivalent dynamic analysis was also conducted. The analysis results show that the CFST column-steel beam joints with flush endplate and long bolts exerts good anti-collapse behavior. The match of endplate thickness and bolt diameter would affect the transition in joint from bending mechanism to catenary mechanism. A formula for the anti-collapse rotation acceptance of joint which takes the configuration details of joint into account was proposed. The dynamic increase factor in DoD standard could effectively describe the dynamic response of joint in bending mechanism while the influence of catenary mechanism was not considered.

导出引用

徐嫚1，高山2,3，郭兰慧4. 钢管混凝土柱-钢梁平齐端板连接节点抗倒塌性能试验研究[J]. 振动与冲击, 2020, 39(20): 121-127

XU Man1，GAO Shan2,3，GUO Lanhui4. Experimental study on anti-collapse behavior of CFST column-steel beam joint using flush endplates[J]. Journal of Vibration and Shock, 2020, 39(20): 121-127

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