摘要
阐述体外预应力在连续刚构桥新桥设计、旧桥加固阶段应用的结构特点,指出其利弊,建议对于大跨连续刚构桥设计阶段在结构上考虑预留布置体外预应力张拉系统,方便以后加固。
This article discusses the structural characteristics of external prestressing technology on the continuous rigid frame bridges design and the retrofit of existing bridges.It indicates the related advantages and disadvantages,and suggests considering arrangements of external prestressing system during design phase of the continuous rigid frame long- span bridges in order to provide convenience for the retrofit.
关键词
体外预应力
连续刚构
设计
加固
external prestressing
continuous rigid frame
design
retrofit
