预应力度及部分预应力混凝土A、B类构件分类限值

Degree of Prestress and Boundary Value between Partially Prestressed Concrete Class A and Class B

本文介绍国内外对预应力度的几种定义及其表达形式,并进行了分析对比。根据我国《铁路桥涵设计规范》的特点,建议了《铁路桥涵设计规范》采用的定义和表达式。根据混凝土材料和作者进行的部分预应力混凝土梁的动载试验研究,建议了考虑动载时的铁路桥梁部分预应力混凝土A、B类构件的分类限值,供《桥规》修订时参考。

Several definitions and formulas of degree of prestress at home and abroad are introduced,analysed and compared in this paper,and according to the characteristics of Railway Bridge Design Code,some suitable definition and formula are also suggested.Boundary value between partially prestressed concrete class A and class B taking into consideration the effect of fatigue loading is recommended through the authors experimental research of concrete and partially prestressed concrete subjected to fatigue loading.