车辆荷载作用下钢波纹板拱桥应变分析

Strain analysis of porous corrugated steel arch bridge under vehicle loads

文章依托安徽泗洪至许昌高速公路淮北段钢波纹板拱桥工程实例,采用ANSYS软件建立该桥的等效实体模型,对钢波纹板拱桥在车辆荷载作用下的应变进行模拟计算,将计算结果与现场实测数据进行对比分析,验证了所建模型的有效性和可行性。在该模型基础上研究公路-Ⅰ级车辆动荷载下的应变变化规律。研究结果表明:在车辆荷载作用下,边跨各位置整体受到拉应变,且拱脚处的应变值稍大于其他位置;车速的改变并不改变钢波纹板拱桥各测点位置的应变规律,而钢波纹板拱桥各测点的应变值与车速大小成正比。

For the engineering project of corrugated sheet steel arch bridge in Huaibei segment of Si -hong-Xuchang expressway ,Anhui Province ,the equivalent physical model of this bridge is built by u-sing ANSYS software to calculate the strain of the corrugated sheet steel arch bridge under the vehicle loads .The calculated results and the measured data are compared and analyzed to verify the effective -ness and feasibility of the model .The strain variation rules under the load of highway I-level vehicle are researched on the basis of this model .The results show that under the vehicle loads ,the whole of the side span positions are under tensile strain ,and the strain value at the arch foot is slightly larger than those of the other positions ;the strain variation rules of each measuring point position of the cor-rugated steel plate arch bridge do not change with the speed ,while the strain values of the measuring point positions of the corrugated steel plate arch bridge are proportional to the vehicle speed .