摘要
结合嘉绍大桥南岸引桥工程实例,开展多跨连续刚构桥合龙方案优化及顶推力取值研究,得出了顶推力估算公式。分析认为七跨一联的连续刚构桥,边跨、中跨、次中跨、次边跨的合龙顺序与常规的边跨到中跨的合龙顺序比较,更有利于改善主梁与桥墩的变形,且能有效地改善桥墩底部的受力。
Combining the engineering project of approach bridge in the south of Jiashao Bridge,the research on the closure scheme optimization and the jacking force value of the multi-span continuous rigid frame bridge is carried out,the formulae for estimating the jacking force is obtained.Analysis indicates that the closure order about the sidespan,midspan,infra-midspan,and infra-sidespan,which are the structure of the seven-span continuous girder rigid frame bridge,is better for improving the transforms between girder and pier and can effectively improve the stress of the pier bottom than the traditional closure order from sidespan to midspan.
出处
《中国港湾建设》
北大核心
2011年第1期48-51,共4页
China Harbour Engineering
关键词
多跨连续刚构桥
合龙方案
顶推力
水平位移
multi-span continuous rigid frame bridge
closure scheme
Jacking force
horizontal displacement
