华南理工大学学报(自然科学版) ›› 2004, Vol. 32 ›› Issue (12): 43-46.

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竖向荷载作用下无粘结预应力砼平板-T 形柱节点的试验研究

李光星 蔡健   

  1. 华南理工大学 土木工程系‚广东 广州 510640
  • 收稿日期:2003-12-10 出版日期:2004-12-20 发布日期:2015-09-08
  • 通信作者: 李光星(1972-)‚男‚博士生‚现任广州市设计院工程师‚主要从事异形柱住宅结构体系研究。 E-mail:Lg-x@sina.com
  • 作者简介:李光星(1972-)‚男‚博士生‚现任广州市设计院工程师‚主要从事异形柱住宅结构体系研究。

Experimental Research on the Unbonded Prestressed Concrete Flat Slab-T-shaped Column Connections Under Gravity Loads

Li Guang-xing Cai Jian   

  1. Dept.of Civil Engineering‚South China Univ.of Tech.‚Guangzhou 510640‚Guangdong‚China
  • Received:2003-12-10 Online:2004-12-20 Published:2015-09-08
  • Contact: 李光星(1972-)‚男‚博士生‚现任广州市设计院工程师‚主要从事异形柱住宅结构体系研究。 E-mail:Lg-x@sina.com
  • About author:李光星(1972-)‚男‚博士生‚现任广州市设计院工程师‚主要从事异形柱住宅结构体系研究。

摘要: 进行了6个足尺平板-T 形柱节点试件的冲切性能试验.阐述了平板-T 形柱节点 的冲切受力性能和破坏特征‚分析了无粘结预应力钢筋的应力变化特点以及板暗梁面筋和 抗冲切箍筋的应变发展特点‚对比了试件的极限承载力.试验结果表明‚施加一定预压应力 的试件具有较好的抗冲切受力性能‚增加预压应力和平板厚度可提高节点的冲切承载力。

关键词: 无粘结预应力混凝土, 平板-T 形柱节点, 冲切荷载, 试验研究

Abstract: An experimental research on six ful-l size flat slab-T-shaped column connections was carried out to investigate the punching shear behavior.The punching shear behavior and failure features of the connections were expounded‚ and the stress variation of the unbonded prestressed bars was analyzed‚as well as the strain variations of the top flexural reinforcements and the stirrups in slab.Moreover‚the ultimate punching shear strengths of the specimens were compared.Experimental results show that the prestressed concrete specimens are of better punching shear behaviors‚ and the behaviors improve with the increasing of prestressing and flat slab thickness. 

Key words: unbounded prestressed concrete, flat slab-T-shaped column connection, punching load, experimental research 

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