T型刚构桥运营期结构变形与应力变化

Structural Deformation and Stress Changes during Operation of T-Shaped Rigid Bridge

以一座在役带挂梁T型刚构桥为研究对象,通过对关键位置应力及挠度进行监测,并结合以往管养资料及计算分析结果,对桥梁运营期的应力及挠度变化进行了分析研究。结果表明:经过前期的合理处治,桥梁暂未出现带挂梁的T型刚构桥常见的腹板开裂、悬臂持续下挠、桥面折线现象;监测期内重点部位的局部应力及挠度未见异常变化,结构目前处于安全的状态。可为同类型桥梁的管养提供参考。

A T-shaped rigid frame bridge with hanging beam in service has been taken as the research object.By monitoring the stress and deflection of key positions,combined with the previous management data and calculation analysis results,the stress and deflection changes of the bridge during operation have been analyzed and studied.The results have shown that after the reasonable treatment in the early stage,the common web cracking,cantilever continuous downward deflection and deck broken line of T-shaped rigid frame bridge with hanging beam don t appear.During the monitoring period,the local stress and deflection of the key parts don t change abnormally,and the structure is currently in a safe state.It can provide reference for the management and maintenance of the same type of bridge.