威坪大桥的空间有限元分析与静荷载试验研究

Spatial finite element analysis for Weiping Bridge and its static loading test

采用通用的有限元程序ANSYS对中承式劲性骨架钢筋混凝土拱桥—威坪大桥进行了空间分析,介绍了该桥的静荷载试验,并将荷载试验的实测结果与理论计算结果进行了分析比较。结果表明,采用控制截面内力等效的原则进行成桥试验比较方便、准确;劲性骨架钢筋混凝土拱肋截面受力后变形仍符合平截面假定;威坪大桥的横撑在横桥向偏载时的二次分配内力的作用较弱。

The finite element program ANSYS is adopted for spatial analysis of concrete-filled steel tube skeleton arch bridge. The static loading test of the bridge is introduced in the paper, and the measured and calculated results are compared. It represents that the method of controlling equivalent inner force in section for test is easy and accurate; the deformation is conformed with assumed value in balance section after applying force to an arch rib section of reinforced concrete;secondary distributed inner force to cross bar of Weiping Bridge is weak in eccentric loading.