摘要
体外预应力加固方法比传统的加固方法有概念明确、加固效果显著的优点。文中以哈尔滨市某预应力混凝土现浇连续梁高架桥为背景,简单介绍了体外预应力加固体系及体外束的布置方式,通过桥梁加固前后静力荷载试验数据分析,得出该桥通过体外预应力加固后,其结构整体刚度、承载能力得到显著改善,满足了原设计荷载要求,实现了预期的加固效果。
The external prestressing reinforcement method has a clearer concept and a stronger reinforcement effect than the traditional reinforcement method. Based on a background of a prestressed concrete viaduct with cast-in-place continuous beams in Harbin, this paper briefly introduces the external prestressed reinforcement system and the arrangement of the external beam. Through the analysis of the static load test data before and after the bridge reinforcement, it is concluded that the overall stiffness and bearing capacity of the bridge is significantly improved after reinforcement, which satisfies the original design load requirements and achieves the expected reinforcem effect.
作者
许明冬
XU Mingdong(Harbin Municipal Engineering Design Institute,Harbin 150070,China)
出处
《低温建筑技术》
2019年第2期50-52,共3页
Low Temperature Architecture Technology
关键词
预应力混凝土梁
体外预应力
加固
prestressed concrete beams
external prestressing
reinforcement