桁式组合拱桥4种加固方法的对比分析  

Comparative Analysis of Four Kinds of Strengthening Methods for Composite Trussed Arch Bridges

作　　者：牛宏[1,2] 贾磊[2] 慕玉坤[2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]中交第一公路勘察设计研究院有限公司,陕西西安710068

出　　处：《桥梁建设》2009年第1期78-80,共3页Bridge Construction

摘　　要：介绍桁式组合拱桥的常见病害,分析该类桥梁4种加固方法的特点,这4种加固方法包括:体外预应力加固、转换原桥的结构体系、被动加固和减载加固。通过实例对这4种方法的加固效果进行对比计算分析。结果表明,体外预应力加固是一种比较合理可行的方法。This paper introduces the common deteriorations of composite trussed arch bridges and analyzes the characteristics of four kinds of strengthening methods having been applied to the bridges, including those of the external prestressing strengthening, transferring of structural systems of the original bridges, passive strengthening and load degrading strengthening. Through practical examples, the effect of the four kinds of the strengthening methods are comparatively calculated and analyzed. The results show that the external prestressing strengthening is a considerably rational and feasible method for strengthening of the bridges.

关 键 词：桁架桥 拱桥 桥梁加固 体外预应力 

分 类 号：U448.224[建筑科学—桥梁与隧道工程] U445.72[交通运输工程—道路与铁道工程]