连续箱梁桥力学性能分析

The Mechanical Characteristics Analysis of the Continuous-box Bridge

根据郑州Gl07线跨机场路钢筋混凝土连续箱梁高架桥的结构特点,采用空间梁单元对其进行有限元离散,建立了该桥梁结构的有限元分析模型,利用大型结构有限元分析程序SuperSAP93对连续箱梁桥的力学性能进行了计算和分析,给出了在试验荷载作用下桥梁控制点的位移、内力,经对比桥梁静载试验实测值和有限元计算值,得到了该桥梁结构校验系数小于l的结论,证明了该桥梁结构整体工作性能良好,计算结果可为桥梁检验提供参考.

In this paper, according to the reinforced concrete continuous-box bridge structure characteristics on the airdrome-rode of G107 line,by using space beam element the structure is dispersed and the FEM analysis model of the bridge structure is established.By using the large-scale FEM analysis program Super SAP93,the mechanical characteristics of the continuous-box bridge is calculated and analysed.The displacements and internal forces of the reference points are obtained under the test load,and after comparing the survey results of the static loading examination and the FEM calculate results,the result shows that the checkout coefficient of the bridge is less than 1 and the whole performance of the bridge is fine.The results provide reference for the bridge detecting and checking.