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主办单位:重庆大学
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矩管混凝土柱-SRC梁型钢贯通节点抗震性能试验研究
何乐平1, 凌宵1, 胡启军1, 蔡其杰2, 孟庆成1
1.西南石油大学 土木工程与建筑学院, 成都 610500;2.西南交通大学 交通运输与物流学院, 成都 610031
摘要:
提出一种适用于快速施工的新型矩管混凝土柱-SRC梁型钢贯通节点形式。参考实际两种建筑规格,设计4个节点试件,基于拟静力荷载试验,探讨节点试件抗震性能,分析各试件的破坏现象、滞回性能、刚度、延性及耗能能力等抗震性能。结果表明:节点的破坏形态为梁端混凝土压坏,型钢翼缘屈曲,形成塑性铰;试件的滞回曲线相对饱满,刚度退化明显,延性系数在2.33~3.8之间,等效黏滞阻尼系数在0.283~0.4之间。与已有节点对比,新型节点刚度大,同时避免了核心混凝土浇筑困难的问题。
关键词:  型钢混凝土梁  节点  破坏形态  抗震性能  刚度
DOI:10.11835/j.issn.2096-6717.2019.126
分类号:TU398
基金项目:国家自然科学基金(51574201);四川省科技支撑计划(2015SZ0232)
Experimental analysis of seismic performance of the joint of rectangular tube concrete column-SRC beam steel
He Leping1, Ling Xiao1, Hu Qijun1, Cai Qijie2, Meng Qingcheng1
1.School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, P. R. China;2.School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031, P. R. China
Abstract:
A new type of through-node of rectangular tube concrete column-SRC beam steel suitable for rapid construction is proposed. With reference to two actual building specifications, four-node test pieces were designed. Based on the pseudo-static load tests, the seismic performance of the joint specimens was discussed, and the seismic behaviors, such as failure phenomena, hysteretic behavior, stiffness, ductility and energy dissipation capacity were analyzed. The test results show that the failure mode of the joint is the compression failure of the concrete at the beam end concrete, coupled with the buckling of steel flange and finally forming a plastic hinge. The hysteresis curve of the specimen is relatively full, and the stiffness is obviously degraded. The ductility coefficient is between 2.33 and 3.8. The equivalent viscous damping coefficient is between 0.283 and 0.4. Compared with the existing nodes, the new type of joint has high rigidity and avoids the problem of difficult core concrete pouring.
Key words:  steel reinforced concrete beams  joints  failure modes  seismic performance  stiffness
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