- 摘 要
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(1 遵義師范學院工學院， 遵義 563006； 2 山地城鎮(zhèn)建設與新技術教育部重點實驗室（重慶大學）， 重慶 400045； 3 重慶大學土木工程學院， 重慶 400045)
［摘要］為研究現(xiàn)澆鋼筋混凝土空心樓蓋抗沖切性能，明確板柱節(jié)點實心區(qū)及暗梁配置箍筋對沖切承載力和節(jié)點破壞模式的影響，在豎向荷載作用下完成了1個僅有板柱節(jié)點實心區(qū)和2個僅配置暗梁箍筋的現(xiàn)澆混凝土空心樓蓋內(nèi)板柱節(jié)點的靜力試驗。結果表明：空心樓蓋板柱節(jié)點與傳統(tǒng)無梁樓蓋板柱節(jié)點具有相似的沖切破壞形態(tài)；設置節(jié)點實心區(qū)或在暗梁中配置箍筋均可改善抗沖切性能；配置暗梁箍筋比設置節(jié)點實心區(qū)在提高抗沖切能力方面效果更好；通過控制暗梁配置箍筋數(shù)量可以有效地改變板柱節(jié)點的破壞類型，使其由脆性沖切破壞轉(zhuǎn)變?yōu)檠有詮澢茐摹８鶕?jù)試驗結果提出了空心樓蓋板柱節(jié)點的抗沖切設計建議。
［關鍵詞］空心樓蓋； 板柱節(jié)點； 抗沖切性能； 試驗研究
中圖分類號：TU375-2文獻標識碼：A文章編號：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
*貴州省教育廳青年科技人才成長項目（黔教合KY字［2016］257號），貴州省科技廳聯(lián)合基金項目（黔科合LH字［2017］7083號）, 貴州省科技廳學術新苗培養(yǎng)及創(chuàng)新探索項目培育項目（黔科合平臺人才［2017年］5727-02號）。
作者簡介：黃川騰，博士，副教授，Email: huangct@yeah.net。
