体外预应力技术在“拔柱”加固中的应用探讨  

Discussion of Utilizing External Pre-stressing Technique in Strengthening Existing Structures with Columns Removed

作　　者：王啸 

机构地区：[1]中国中元国际工程有限公司,北京100089

出　　处：《工程建设与设计》2016年第10期19-23,26,共6页Construction & Design for Engineering

摘　　要：体外预应力作为后张预应力体系的重要分支,其特点是将力筋布置在构件截面以外,因此,可以很方便的用于结构加固。作为一种主动加固法,体外预应力能同时大幅提高既有结构的承载力和刚度,在"拔柱"加固中具有传统方法无法比拟的优势,被越来越广泛地运用到实际工程中。论文对运用体外预应力进行"拔柱结构"加固的工作原理、设计方法、关键技术、规范要求等方面进行了探讨,可供类似工程参考。External pre-stressing technique is one of the most important branches of post-tensioned pre-stressed system. It is characterized with steel tendons fixed outside structure element, which make it conveniently utilized in strengthening existing buildings. As an act-in-advance technique, external pre-stressing can significantly promote the performance of structures in both bearing capacity and rigidity. With this incomparable strength in strengthening structures with columns removed, external pre-stressing technique has been used even more widely in real projects. This paper discussed the technique of using external pre- stressing in strengthening existing struc^tres with columns removed in the aspects of working principle, design method, key techniques, code requirements and etc. to provide reference to similarprojects.

关 键 词：体外预应力 结构加固 拔柱 结构承载力 结构刚度 

分 类 号：TU757[建筑科学—建筑技术科学] TU378.4