The external post -tensioning techniques used for structures retrofitting are analyzed comprehensively. The design and calculating methods of RC flexural members strengthened with external tendons are discussed. Meanwhile, the general profiles of external tendons and the joint detail are also presented. Moreover, the construction techniques of using post-tensioning to strengthening frame beams are introduced. Post-tensioning is also used as seismic retrofitting techniques for masonry structures in foreign countries and the related principles and methods are also introduced briefly.%对后张体外预应力技术在结构加固工程中的应用进行了较为全面的分析.探讨了后张预应力加固钢筋混凝土受弯构件的设计计算方法,提出了预应力筋的常用束形布置和节点做法,并结合某工程实例分析了预应力加固框架梁的有关施工方法.后张预应力技术目前在国际上还被用于砖砌体结构的抗震加固,对其原理和效果也进行了简要的介绍.
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