摘要
大跨度结构施工监测与分析是施工中的关键环节,结合连续箱梁桥体外预应力加固实例,探讨了体外预应力的施工监控内容与仿真分析方法。以预应力筋的索力,应变测试和桥面变形监控为主要监测内容,通过有限元软件MIDAS对预应力张拉过程进行模拟分析。监测结果表明实测数据与模拟分析理论值较好吻合。该工作和研究成果是连续梁桥体外预应力施工过程中一项重要的安全指标,同时为以后相关工程的设计与施工提供一定参考价值。
The construction monitor and analysis of long-span structure are the key links in the construction.Combined with an external pre-stressing reinforcement of a continuous box beam bridge, the article discusses the construction monitor contents and simulating analysis method of external pre-stressing. Taking the pre-stressed reinforcement cable force, strain test and deck deformation monitor as the main monitoring contents, the finite element software MIDAS is used to simulate and analyze the pre-stressing tension process.The monitor result shows that the measured data is better identical with the simulating analysis theoreticalvalue. This work and the study result is an important safety index in the external pre-stressing construction process of continuous beam bridge, and also is referred for the design and construction of the similar projects.
出处
《城市道桥与防洪》
2016年第9期181-185,18-19,共5页
Urban Roads Bridges & Flood Control
关键词
连续箱梁
体外预应力
施工监测
MIDAS
continuous box beam
external pre-stressing
construction monitor
MIDAS
