(1 遵义师范学院工学院， 遵义 563006； 2 山地城镇建设与新技术教育部重点实验室（重庆大学）， 重庆 400045； 3 重庆大学土木工程学院， 重庆 400045)

［摘要］为研究现浇钢筋混凝土空心楼盖抗冲切性能，明确板柱节点实心区及暗梁配置箍筋对冲切承载力和节点破坏模式的影响，在竖向荷载作用下完成了1个仅有板柱节点实心区和2个仅配置暗梁箍筋的现浇混凝土空心楼盖内板柱节点的静力试验。结果表明：空心楼盖板柱节点与传统无梁楼盖板柱节点具有相似的冲切破坏形态；设置节点实心区或在暗梁中配置箍筋均可改善抗冲切性能；配置暗梁箍筋比设置节点实心区在提高抗冲切能力方面效果更好；通过控制暗梁配置箍筋数量可以有效地改变板柱节点的破坏类型，使其由脆性冲切破坏转变为延性弯曲破坏。根据试验结果提出了空心楼盖板柱节点的抗冲切设计建议。

［关键词］空心楼盖； 板柱节点； 抗冲切性能； 试验研究

中图分类号：TU375-2文献标识码：A文章编号：1002-848X(2019)13-0124-08

Experimental study on punching shear behavior of slab-column joint for cast-in-situ reinforced concrete hollow floor structure

Huang Chuanteng1, Wang Zhijun2,3, Pang Huiying2,3, Pu Shuang1

(1 School of Engineering and Technology, Zunyi Normal College, Zunyi 563006, China; 2 Key Laboratory of New Technology  for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China; 3 School of Civil Engineering, Chongqing University, Chongqing 400045, China)

Abstract:In order to study the punching shear behavior of cast-in-situ reinforced concrete hollow floor, the effects of solid zone of slab-column joints and stirrups of concealed beams on punching shear behavior and failure mode of joints were clarified. Static tests of one solid zone of slab-column joints and two joint of cast-in-situ concrete hollow floor with only concealed beam stirrups were carried out under vertical loads. The results show that the hollow floor slab-column joints have similar failure modes to the traditional beamless floor slab column joints; the punching shear behavior can be improved by setting solid joint area or stirrups in concealed beam; the stirrups with concealed beam is better than that with solid joint to improve the punching shear resistance; by controlling the number of stirrups in concealed beams, the failure types of slab-column joints can be changed from brittle punching failure to ductile bending failure. According to the test results, the suggestion of punching shear design for hollow floor slab-column joints was put forward.

Keywords:hollow floor; slab-column joint; punching shear behavior; experimental study

*贵州省教育厅青年科技人才成长项目（黔教合KY字［2016］257号），贵州省科技厅联合基金项目（黔科合LH字［2017］7083号）, 贵州省科技厅学术新苗培养及创新探索项目培育项目（黔科合平台人才［2017年］5727-02号）。

作者简介：黄川腾，博士，副教授，Email: huangct@yeah.net。