[1]李光星,蔡健,陈加猛,等.无粘结预应力混凝土平板-T形柱节点冲切性能试验研究[J].东南大学学报(自然科学版),2005,35(4):563-568.[doi:10.3969/j.issn.1001-0505.2005.04.015]
 Li Guangxing,Cai Jian,Chen Jiameng,et al.Experimental study on punching shear behavior of unbonded prestressed concrete flat slab-T-shaped column connections[J].Journal of Southeast University (Natural Science Edition),2005,35(4):563-568.[doi:10.3969/j.issn.1001-0505.2005.04.015]
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无粘结预应力混凝土平板-T形柱节点冲切性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第4期
页码:
563-568
栏目:
土木工程
出版日期:
2005-07-20

文章信息/Info

Title:
Experimental study on punching shear behavior of unbonded prestressed concrete flat slab-T-shaped column connections
作者:
李光星1 蔡健1 陈加猛2 杨伟雄2
1 华南理工大学土木工程系, 广州 510640; 2 广州市建筑科学研究院, 广州 510030
Author(s):
Li Guangxing1 Cai Jian1 Chen Jiameng2 Yang Weixiong2
1 Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China
2 Academy of Building Research of Guangzhou, Guangzhou 510030, China
关键词:
无粘结预应力混凝土 平板-T形柱节点 试验研究 冲切承载力
Keywords:
unbounded prestressed concrete flat slab-T-shaped column connection experimental study punching shear strength
分类号:
TU378.5
DOI:
10.3969/j.issn.1001-0505.2005.04.015
摘要:
针对平板-异形柱节点冲切试验很少以及现行规范没有明确规定的情况,进行了5个无粘结预应力混凝土平板-T形柱节点试件和1个钢筋混凝土平板-T形柱节点试件的冲切性能对比试验.阐述了无粘结预应力混凝土平板-T形柱节点的冲切受力性能和破坏特征,研究了无粘结预应力钢筋应力变化特点以及抗冲切箍筋、板暗梁面筋的应力变化特点,并将其受力性能与具有相同板厚和相同板面平均配筋率的钢筋混凝土平板-T形柱节点进行了对比,探讨了施加预压应力对平板-异形柱节点冲切受力性能的影响.试验结果表明,与相应的钢筋混凝土平板-T形柱节点试件相比,施加一定预压应力的试件具有相当的延性和较好的抗冲切受力性能; 增加预压应力可提高节点的冲切承载力.最后采用ACI 318 — 02, Eurocode 2和GB 50010 — 2002所推荐的计算公式对上述节点的冲切承载力进行了验算,提出规范公式均适用于计算平板-异形柱节点冲切承载力的设计建议.
Abstract:
Since the punching shear behavior of unbonded prestressed concrete flat slab-special-shaped column connections was less investigated and there was no definite specification in current code, an experimental study was carried out. Five prestressed concrete specimens and one reference specimen with no prestressing were tested under equal gravity loads. The failure features and mode of the specimens were presented. The stress of the unbonded prestressed bars, the strain of the top flexural reinforcements and the stirrups in slab were investigated. The influences of limited prestress on punching shear strength were studied. The test results show that the prestressed concrete specimens keep fair ductility and have better punching shear behaviors than the reinforced concrete specimen. Increasing the prestressing level could improve the punching shear strength. The test results on the punching shear strength were compared with the calculation results from the formulae proposed by ACI 318 — 02, Eurocode 2 and GB 50010 — 2002. And it is shown that the formulae proposed by these codes are suitable in be adopted in design.

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备注/Memo

备注/Memo:
作者简介: 李光星(1972—),男,博士生; 蔡健(联系人),男,博士,教授,博士生导师,cvjcai@scut.edu.cn.
更新日期/Last Update: 2005-07-20