湖天大桥的检测与加固前后的受力性能分析

Load Performance Analysis of Hutian Bridge Before and After the Test and Reinforcement

根据湖天大桥的现场测量数据,建立了空间有限元分析模型,并对该模型进行理论计算。通过对现场监测结果和理论计算结果的对比分析,提出了具体的加固方案。在不同组合荷载下,对该桥加固前、后的受力性能进行了比较,并得出结论:采用马蹄形加大截面法加固桥梁后主要结构受力性能显著提高,跨中位移显著降低。监测数据表明,该加固方案是可靠和有效的。

Base on the field observation data of Hutian Bridge,the spatial finite element analysis model is established for theoretical calculation.The concrete scheme is provided by contrasting results of field test and theoretical calculation.Under different load combination,the comparative analysis in theory shows that mechanical behavior of the main structure rises obviously and the displacement of mid-span remarkably decreases by means of the horseshoe enlarging section method.The actual application of this reinforcement scheme indicates that the scheme is reliable and effective.