混凝土曲线连续梁桥受力性能分析

Mechanical Performance Analysis of Concrete Curved Continuous Girder Bridge

随着交通事业的快速发展,混凝土曲线连续梁桥在工程中得到了广泛的应用。运用有限元分析软件ANSYS建立了跨径相同的直线连续梁桥和曲线连续梁桥模型,并对二者的力学特性进行了分析对比。结果显示:在恒载(含二期恒载)和公路-Ⅱ级荷载共同作用下,梁单元建模与实测值更为接近,而壳单元建模偏于保守,曲线连续梁桥比直线连续梁桥受力具有更明显的空间特性。动力特性分析显示,曲率半径对曲线连续梁桥与直线连续梁桥的振型和自振频率无明显影响。

With the rapid development of transportation,concrete curved continuous beam bridge has been widely used in engineering.In this paper,the detailed results are compared with the measured values.Using the finite element analysis software ANSYS,the models of linear continuous beam bridge and curved continuous beam bridge with the same span are established,and their mechanical characteristics are analyzed and compared.The results show that the analysis results,under the combined action of dead load(including phaseⅡdead load)and highway class-Ⅱload,with beam element modeling are closer to the measured values,while the shell element modeling is conservative,The curved continuous beam bridge has more obvious spatial characteristics than the straight one.The analysis of dynamic characteristics shows that curvature radius has no obvious effect on the mode and natural frequency of curved and linear continuous beam bridges.