预应力混凝土箱梁桥静载试验评定与分析

桥梁的静载试验是检测桥梁结构承载能力、分析桥梁静力特性的重要手段.以兰州市小西湖黄河预应力混凝土箱梁桥为背景,采用结构分析商用程序MI-DAS/CIVIL建立三维实体单元有限元模型进行静载试验计算,分析了预应力混凝土箱梁桥在设计荷载作用下的挠度特性、承载能力以及应变特性.通过实测值与理论计算值的比较,讨论分析结构校验系数得出该桥梁的实际强度、刚度以及了解结构的实际运行状况,从而对其作出科学客观的评定.

Evaluation and analysis of static load test of prestressed concrete box girder bridge

The bridge static load test is an important means, bearing capacity analysis of static characteristics of bridge detection of bridge structure. In the Yellow River Lanzhou West Lake prestressed concrete box girder bridge, using the structural analysis software MIDAS/CIVIL to establish three-dimensional solid finite element model of static load test calculation, the author analyzed the deflection characteristics of prestressed concrete box girder bridge under the design load, its bearing capacity and the strain characteristics. The scientific and objective assessment is made based on the comparison between the measured values and the theoretical values, and the analysis of the actual strength, stiffness, actual operating conditions of its structure calibration coefficient.