府河盘龙大桥施工预拱度预测与分析

采用有限元方法，对府河盘龙大桥主桥三跨预应力连续箱梁桥的悬臂挂篮施工过程进行了数值模拟分析。预测和分析了施工预拱度的大小。同时，研究了恒载、预应力及混凝土的收缩徐变对顸拱度的贡献影响分析，并对比研究了4种规范的收缩徐变计算模式和对施工顸拱度的影响。另外，对混凝土材料力学参数、密度及弹性模量，进行了敏感性分析，得到了其对预拱度的影响范围。这些工作对预拱度设置的分析调整具有重要的指导意义。

Evaluation and Analysis of Fuhe-Panlong Bridge's Construction Camber

The cantilevered construction stages of the Fuhe-Panlong Bridge were simulated by the finite element method, which was composed of three-span prestressed continuous box girder beam. The construction cambers were evaluated and analyzed. Meanwhile, the influences of dead loads, prestressed loads and shrinkage and creep of concrete on construction camber were studied, and four kinds of shrinkage-creep's calculation codes and their influence on construction camber were investigated. Finally, sensitivity analysis of construction camber in virtue of the fluctuation of concrete density and elastic modulus was conducted. The study played an important role in the analysis and modification of construction camber.