体外预应力混凝土结构研究现状与展望  

Current Status and Prospects of Research and Development of Externally Prestressed Concrete Structures

作　　者：胡志坚[1] 郭友[2] 谭金华[1] 

机构地区：[1]同济大学桥梁工程系 [2]天津市海顺交通工程设计有限公司,天津300074

出　　处：《公路交通科技》2006年第2期94-97,101,共5页Journal of Highway and Transportation Research and Development

摘　　要：对现阶段体外预应力技术在桥梁工程领域的研究现状进行了总结,并在总结分析的基础上,提出了体外预应力技术研究目前尚需完善的研究领域和方向,包括体外预应力筋应力增量取值、动力特性研究、试验数据收集、设计理论研究、极限强度综合分析系统开发等,为体外预应力技术的进一步研究提供了一定的参考依据。This paper presents the state-of-the-art of externally prestressed techniques that have been used in the bridge engineering.And based on the summary and analysis of the cunrent R＆D of the externally prestressing techniques, it mainly discusses some aspects of external prestressing which have not been dealt with successfially, including calculating the changing of stress in externally prestressed tendons, studying vibration characteristics of externally prestressed concrete structures, enhancing experimental data, studying the desig~ theories, and developing the ultimate strength analysis program for externally prestressed structures based on the finite element methed. All these presented and discussed here can offer some significant reference information for further researches of the external prestressing technology.

关 键 词：体外预应力 极限强度 应力增量 承载力 

分 类 号：U416.217[交通运输工程—道路与铁道工程]