体外预应力法在加固连续钢构桥中的应用  

Application of External Prestressing Method in Strengthening Continuous Rigid frame Bridge

作　　者：马成华 Chenghua Ma(Qinghai Tianlu Jiaotong Gongcheng Co.,Ltd,Xining 810000 China)

机构地区：[1]青海天路交通工程建设有限责任公司,西宁810000

出　　处：《青海交通科技》2018年第6期96-101,共6页Qinghai Transportation Science and Technology

摘　　要：以体外预应力法在国道214线青根河大桥体外预应力加固工程的应用为例,讨论了体外预应力加固法的一般设计内容和设计步骤。通过对布束形式、转向和锚固部分设计方法、加固后桥梁极限设计状态的计算方法的探讨,提出一套规范化计算设计方法,并将其应用于工程实例加固效果的计算及评价。结果表明体外预应力法对结构补强以及承载潜力起到了一定的效果,本文的研究内容也将为今后体外预应力法加固桥梁设计提供一套可行的计算方法。The application of external prestressing in the reinforcement project of Yin Genhe large bridge was taken as an example to discuss the design content and process of external prestressing method. Through discussion on the layout of tendon, design of steering and anchorage part, and the calculation method of ultimate design state of bridge after reinforcement, a set of standardized method for design and calculation were put forward, and the application in reinforcement project was evaluated. The results show that the external prestressing method has a certain effect on the structural reinforcement and the load carrying potential. The research will also provide a feasible calculation method for the design of bridge strengthening by external prestressing method.

关 键 词：体外预应力 加固 计算方法 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]