南宁某糖厂体外预应力加固分析  

Sugar of Nanning refinery external prestressing analysis

作　　者：金凌志[1] 祁凯能[1] 邓宁 钟翔 

机构地区：[1]桂林理工大学广西建筑工程检测与实验重点试验室,广西桂林541004 [2]广西建筑科学研究设计院,广西南宁530011

出　　处：《混凝土》2013年第3期141-143,共3页Concrete

基　　金：广西自然科学基金项目(桂科自0447095);广西建筑工程检测与试验重点实验室基金项目(桂科能07109005-16);重点实验室项目:广西建筑工程检测与试验重点实验室资助课题(11-cx-04)

摘　　要：体外预应力加固钢筋混凝土梁是一种非常有效的加固方式,但是计算比较麻烦,为了加快体外预应力加固技术在工程实践中的应用,通过工程实例详细介绍了体外预应力承载力增量的计算方法,其计算方程通过跨中控制截面的弯矩平衡以及拉-压杆模型推导得出,忽略受压区钢筋的作用和预应力钢筋和转向块之间的摩擦,假设其普通钢筋在极限承载力状态下达到屈服,将施加的体外预应力产生的梁的承载力增量单独进行研究分析。对于已知原梁截面的配筋及需要增加承载力增量的体外预应力加固与改建工程可以直接反算其预应力筋面积,设计概念清晰明了,计算过程更加简捷,可供同类工程设计借鉴。Vitro prestressed reinforced concrete beam is a very effective way of reinforcement, but the calculation is too much trouble, in order to speed up the external prestressing reinforcement technology in engineering practice ,the calculation of the equation by the the cross in control cross-section the moment balance as well as pull-tie model derived by external prestressing method of calculation of the bearing capacity increment of detailed engineering instance.The bearing capacity increment would be imposed externally prestressed beams separate research and analysis to ignore the role of the compression zone reinforced and prestressed reinforced and steering friction between the fast, assuming its ordinary reinforced in the ultimate bearing capacity of the state to achieve yield, for the known original beam cross-section of the reinforcement and the need to increase the carrying capacity increment external prestressing reinforcement and reconstruction works directly back calculation area of prestressing tendons for similar engineering design draws.

关 键 词：体外预应力 承载力增量 加固效应 

分 类 号：TU528.01[建筑科学—建筑技术科学]