体外预应力混凝土梁挠度试验研究  

Experimental Research on Deflection of External Pre-stressed Concrete Beam

作　　者：陈春平[1] 李英田[1] 

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006

出　　处：《城市道桥与防洪》2013年第9期175-178,16,共4页Urban Roads Bridges & Flood Control

基　　金：广东省科技计划项目(2010A040308005);广东省自然科学基金项目(S2012010009615)

摘　　要：该文介绍了一项体外预应力混凝土梁挠度的试验研究。通过8根T型截面简支梁静力加载试验,其中6根施加体外预应力和2根不加预应力。主要分析预应力筋、不同转向结构个数、张拉方式和力筋形式对T型截面简支梁挠度的影响。记录各梁受力过程、破坏形态和挠度变形的全部过程。试验结果表明体外预应力筋能提高梁的承载能力,有效阻止裂缝的开展,控制梁的变形,体外预应力能有效地减少梁的挠度,并且不同的转向结构个数、张拉方式和力筋形式都对梁挠度变形有影响。The article introduces an experimental research on the deflection of external pre-stressed concrete beam. Based on the static loading experiment of eight T-type section simple-supported beams, in which six beams are externally pre-stressed and two are not, the article mainly analyzes the influences of pre-stressing tendon, the number of different steering structure, tensioning mode and tendon form on the deflection of T-type section simple-supported beam. The experiment records the whole process of beam stressing, destroying form and deflection deformation. The experimental result shows that the external pre-stressing tendon can improve the bearing capacity of beam, efficiently prevent the development of crack and control the deformation of beam. The external pre-stressing efficiently decreases the deflection of beam. And the different numbers of steering structure, the mode of tension and the form of tendon will all have the influence on the beam deflection deformation.

关 键 词：钢筋混凝土梁 体外预应力 静力试验 挠度变形 

分 类 号：TU323.3[建筑科学—结构工程] TU317.3