方钢管混凝土柱-H型钢梁外环板节点抗剪性能研究
引用文献：
吴海亮 李腾 孙轶良 胡耀伟 王雷 冯昌喜 荣彬. 方钢管混凝土柱-H型钢梁外环板节点抗剪性能研究[J]. 建筑结构，2022，48（06）：97-103.
WU Hailiang LI Teng SUN Yiliang HU Yaowei WANG Lei FENG Changxi RONG Bin. Shear performance study on external diaphragm joints of concrete-filled square steel tube column-H steel beam[J]. Building Structure，2022,48（06）：97-103.
摘要：设计了3个方钢管混凝土柱-H型钢梁外环板节点试件，通过低周往复荷载试验，研究节点抗剪性能。根据试验现象和结果对节点破坏形式、梁端荷载-位移滞回曲线和骨架曲线进行分析。结果表明试件全部发生核心区剪切破坏，主要特征为核心区钢管腹板撕裂，随着轴压比增加还出现了外环板与钢管柱焊缝断裂的现象。分析轴压比对外环板节点抗剪性能的影响，发现轴压比的增加对试件的抗剪承载力、延性以及耗能能力基本没有影响，但会增加节点初始刚度，加剧节点的刚度退化。根据Nishiyama和聂建国提出的节点承载力不同的计算方法，进行了理论值的计算，并与试验值进行了比较，结果表明极限承载力理论值吻合较好，屈曲承载力理论值偏于保守。
关键词：方钢管混凝土柱，H型钢梁，外环板节点，轴压比，破坏形式，抗剪承载力
基金：国网河北省电力有限公司科技项目：“装配式钢结构建筑节点连接性能及框架整体抗震性能研究”(kj2020-037)。
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参考文献[1] Recommendations for design and construction of concrete filled steel tubular structures:AIJ[S].Tokyo:Architectural Institute of Japan,1987.
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[5] 刘晓刚，樊健生，陶慕轩，等.钢管混凝土柱—钢梁节点核心区受剪承载力计算对比研究[J].建筑结构学报，2012,33(2):85-92,118.
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[2] FUKUMOTO T.Elasto plastic behavior of panel zone steel beam to concrete-filled square steel tubular column connection[J].Journal of Structural Engineering,2001,124(11):183-190.
[3] NISHIYAMA I,FUJIMOTO T,FUKUMOTO T,et al.Inelastic force-deformation response of joint shear panels in beam-column moment connections to concrete-filled tubes[J].Journal of Structure Engineering,2004,130(2):244-252.
[4] 聂建国，秦凯.方钢管混凝土柱节点抗剪受力性能的研究[J].建筑结构学报，2007,28(4):8-17.
[5] 刘晓刚，樊健生，陶慕轩，等.钢管混凝土柱—钢梁节点核心区受剪承载力计算对比研究[J].建筑结构学报，2012,33(2):85-92,118.
[6] DESSOUKI A K,YOUSEF A H,FAWZY M M.Investigation of in-plane moment connections of I-beams to square concrete-filled steel tube columns under gravity loads[J].HBRC Journal,2015,11(1):43-56.
[7] 牟犇，陈功梅，张春巍，等.带外加强环不等高梁—钢管混凝土柱组合节点抗震性能试验研究[J].建筑结构学报，2017,38(5):77-84.
[8] RONG B,YANG Z,ZHANG R,et al.Post-buckling shear capacity of external diaphragm connections of CFST structures[J].Journal of Structural Engineering,2019,145(5):04019036.
[9] 矩形钢管混凝土结构技术规程：CECS 159∶2004 [S].北京：中国计划出版社，2004.
[10] 建筑抗震试验规程：JGJ/T 101—2015 [S].北京：中国建筑工业出版社，2015.
[11] 李威.圆钢管混凝土柱-钢梁外环板式框架节点抗震性能研究[D].北京：清华大学，2011.
[12] 冯昌喜.矩形钢管混凝土柱-H型钢梁外加强环节点核心区抗剪性能研究[D].天津：天津大学，2018.
Shear performance study on external diaphragm joints of concrete-filled square steel tube column-H steel beam
Abstract: Three external diaphragm joints specimens of concrete-filled square steel tube column-H steel beam were designed to study the shear performance of joint under cyclic loading. According to the test phenomenon and result, the failure form of the joint, the load-displacement hysteresis curve and the skeleton curve at the end of the beam were analyzed. The results show that all the specimens had shear failure in the core area, and the main feature is the tearing of the steel tube web in the core area. With the increase of axial compression ratio, the phenomenon of weld fracture of external diaphragm and steel column also appeared. The influence of the axial compression ratio on the shear performance of the external diaphragm joints was analyzed, and it is found that the increase of axial compression ratio has little effect on the shear capacity, ductility and energy dissipation capacity of the specimen, but it will increase the initial stiffness of the joint and aggravate the stiffness degradation of the joint. According to different calculation methods proposed by Nishiyama and Nie Jianguo, the theoretical value had calculated and compared them with experimental values. The results show that the theoretical value of ultimate bearing capacity is in good agreement, and the theoretical value of buckling bearing capacity is conservative.
Keywords: concrete-filled square steel tube column; H steel beam; external diaphragm joint; axial compression ratio; failure form; shear capacity
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