铁道标准设计Issue(3)：82-86,5.DOI:10.13238/j.issn.1004-2954.2016.03.018
合龙方案对多跨连续梁桥施工监控的影响分析
Research on the Effect of Closure Program on Construction Monitoring of Multi-span Continuous Beam Bridge
包仪军 1丁明波 1朱龙1
作者信息
- 1. 兰州交通大学土木工程学院，兰州 730070
- 折叠
摘要
Abstract
The closure order of multi-span continuous beam often exerts eminent influence on the cumulative displacement and internal force of the bridge structure. With reference to a pre-stressed concrete continuous beam bridge of (48+4×80+48) m, finite element models are established with respect to three different conditions according for each different closure program to analyze the effects of closure order and pre-stress tensioning in the process of closure on the camber and the internal force during the construction and the causes of displacement difference between the closure ports. It is concluded that the main influencing factors impacting the monitoring are the maximum accumulated displacement and the accumulated displacement difference between closure ports. The results indicate that the setting of camber is greatly influenced by the closure order, especially, the difference in pre-stressed tensioning effect for different structural systems is very big. As reasonable closure order with phased pre-stressed tensioning may facilitate the linear control in construction process, reasonable closure order is proposed based on analysis results.关键词
多跨连续梁/合龙顺序/线形监控/体系转换/预拱度Key words
Multi-span continuous beam/Closure order/Linear monitoring/System transformation/Camber分类
交通工程引用本文复制引用
包仪军,丁明波,朱龙..合龙方案对多跨连续梁桥施工监控的影响分析[J].铁道标准设计,2016,(3):82-86,5.
