改扩建高速公路新旧T梁桥拼接缝受力分析

Stress analysis of splicing joint of new and old T-beam bridge in reconstruction and expansion expressway

为满足交通需求,高速公路改扩建已成为公路建设的一项重要任务。文章以某改扩建高速公路工程为背景,采用Midas/Civil建立旧桥拓宽后全桥的空间梁格模型进行计算分析,分别探讨了新旧T梁桥基础沉降差、混凝土收缩徐变、连接刚度对拼接缝的影响,并给出了相关建议。

In order to meet the traffic demand,highway reconstruction and expansion has become an important task of highway construction.Based on the reconstruction and expansion project of bridge in expressway,this paper uses Midas/Civil to establish the spatial grillage model of the whole bridge after the widening of the old bridge for calculation and analysis,and discusses the influence of foundation settlement difference,concrete shrinkage and creep,and connection stiffness on the splicing joints.