连续梁桥加固技术施工监控研究

Research on Construction Monitoring of Reinforcement Technology of Continuous Girder Bridge

以某高速公路互通为工程背景,根据桥梁的受力特点,采用有限单元法进行理论计算。通过对连续梁桥加固全过程进行现场施工监控,分析比较结构的应力、挠度改变量等的理论值和实测值。结果表明:经加固后连续梁桥,桥梁线形及应变变化不大,底板压应力储备提高,达到了加固设计要求。

Abstract Taking interchange of an expressway as the engineering background, theoretical calculation is made by adopting finite element method according to the loading features of bridge. The theoretical value and measured value of stress, variable quantity of deflection and so on of comparative structure are analyzed through site operation monitoring on the whole process of continuous girder bridge reinforcement. The result shows that： the changes of line shape and strain of continuous girder bridge after the reinforcement are not large and pressure stress reserve of base plate is improved to meet the requirement of reinforcement design.