大跨径PC连续刚构桥下挠控制  

Downwarping control of continuous steel bridge with large-span PC

作　　者：刘洋[1] 彭小明[1] 秦建军[1] 

机构地区：[1]中交公路规划设计院有限公司,北京100088

出　　处：《山西建筑》2012年第17期224-226,共3页Shanxi Architecture

摘　　要：为了有效解决大跨径PC连续刚构的下挠问题,从设计角度出发,结合荷载平衡概念,采用恒载零弯矩法配置预应力钢束,有效地控制了结构下挠,经实践证明这种技术可行有效,从而保证了桥梁结构的安全可靠。In order to effectively control the downwarping issue of continuous steel bridge with large-span PC, starting from the aspect of design, combining with loading balance concept, the paper configures prestressed tendon by using constant loading and zero bending moment method, and effectively controls the structural downwarping. Practice proves that technique is feasible and effectively. As a result, it guarantees the safety and reliability of the bridge structure.

关 键 词：连续刚构桥 下挠控制 基本原理 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]