连续刚构箱梁桥温度场及温度效应的研究

Research on Temperature Field and Temperature Effects on Continuous Rigid Frame Box Beam Bridge

分析温度荷载类型,指出温度荷载是连续刚构箱梁桥产生裂缝的重要原因。结合某桥工程实际,在跨中截面布置了埋入式应变计,并对该桥应变进行了现场观测。对观测数据进行处理,求得适合某连续箱梁桥温度模式。在此基础上用该温度模式通过应用软件Ansys算出温度应力和温度变形,比较几种温度模式计算温度应力时的差异,说明了计算温度应力时选取合理的温度模式至关重要。

Types of temperature load were analyzed, wilch was an important reason for cracks of continuous rigid frame box beam bridge. According to the practical project, the embedded strain gauge in the middle sections was laid out and field observation of bridge strain was done. Temperature mode of continuous box beam bridge was got after analyzing the observation data and then temperature stress and temperature deformation were calculated via the applied software Ansys. Differences of temperature stress under different temperature mode were compared and it was indicated that selection of appropriate temperature mode when calculating temperature stress was very important.