外隔板连接钢管混凝土柱-H型钢梁节点抗剪性能研究

张戊晨; 孙轶良; 王亚敏; 孙建英; 尹书昊; 荣彬

doi:10.13204/j.gyjzG21011504

外隔板连接钢管混凝土柱-H型钢梁节点抗剪性能研究

doi: 10.13204/j.gyjzG21011504

1. 国网河北省电力有限公司经济技术研究院, 石家庄 050021;
2. 天津大学建筑工程学院, 天津 300072;
3. 中国铁路设计集团有限公司, 天津 300000

基金项目:

国网河北省电力有限公司科技项目(kj2020-037)。

详细信息

作者简介:
张戊晨,男,1988年出生,硕士,高级工程师。电子信箱:499797324@qq.com

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出版历程
- 收稿日期: 2021-01-15
- 网络出版日期: 2022-07-23
- 刊出日期: 2022-07-23

Research on Shear Behavior of Weakened External Diaphragm Connection Between CFST Column and Beam

1. State Grid HEBEI Economic Research Institute, Shijiazhuang 050021, China;
2. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
3. China Railway Design Group Co., Ltd., Tianjin 300000, China

摘要

摘要: 通过对4个十字形外隔板连接钢管混凝土柱-H型钢梁节点试件进行低周反复荷载试验研究了该类型节点的抗剪性能,节点试件的核心区钢管厚度进行了一定程度的削弱。试验中研究的参数包括核心区钢管厚度、外隔板宽度和轴压比大小。4个试件的变形发生于核心区钢管翼缘和外隔板的弯曲、核心混凝土的压碎、钢管腹板的剪切变形甚至屈曲开裂,钢管腹板屈曲开裂是主要的剪切破坏形式。试验和有限元参数化分析均表明抗剪承载力与节点核心区钢管厚度正相关,外隔板宽度和轴压比对抗剪承载力的影响不大。对现有的3种针对于钢管混凝土柱-H型钢梁连接节点的抗剪承载力计算方法进行了对比评价,并结合混凝土核心区的剖切试验观测结果,提出了外隔板连接节点的抗剪承载力计算公式。新计算方法考虑了钢管翼缘和外隔板对抗剪承载力的贡献,其结果与试验值吻合良好,该方法的适用性得以验证,可用于外隔板连接节点的设计应用。
- 抗剪 /
- 外隔板 /
- 节点核心区 /
- 试验研究 /
- 计算方法
Abstract: The shear behavior of crucitorn external diaphragm connection between concrete-filled steel tubular (CFST) column and H-shaped beam was investigated under quasi-static loading. Four joint specimens were designed and tested by weakening the thickness of the steel tube in the panel zone. The studied parameters include the thickness of the steel tube in the panel zone, the width of the external diaphragm, and the axial compression ratio. Deformation phenomena mainly occurred in the panel zone, including the bending of steel tube flange and external diaphragm, the crushing of concrete core, the shear deformation, local buckling and cracking of steel tube web. Local buckling and cracking of steel tube webs were main shear failure modes. Numerically and experimentally parametric studies manifested a positive correlation between the shear bearing capacity and the thickness of the steel tube in the panel zone, whereas the width of the external diaphragm and axial conupression ratio showed an insignificant impact on the shear resistance. Based on the experimental phenomena and the evaluation of three existing calculation methods on frame joints, and considering the effects of steel tube flange and extemal diaphragm on shear behavior, a calculation formula on the shear bearing capacity of external diaphragm connection was proposed. The accuracy and applicability of this calculation formula was verified by the test results, and it could provide a reference for external diaphragm connection design.
- shear /
- external diaphragm /
- panel zone /
- test /
- calculation method

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