车辆经拱桥的全过程曲线及其应用研究

基于拱桥影响线,以每足够小的车辆列队行距模拟车辆列队过桥全过程,并利用叠加计算各控制截面内力,开发了内力全过程曲线的实用软件,深入认识车辆过桥对主拱结构的作用,确定拱桥静载试验的车辆荷载、等代荷载和各种汽车的实际荷载等级,得到重轴位于圆弧拱跨中附近时拱脚弯矩最大,与现役桥实测吻合得很好.全过程曲线可方便地进行荷载标准对比,公路I级比城市A级荷载在拱顶小6.34%,某省道线路超载大于113%.

Study of whole process curve of vehicles through arch bridge and its application

Based on influence line theory of an arch bridge,internal forces at control sections are calculated with superposition in small enough steps for a lined-up-vehicles which is employed to analogize lining-up vehicles across the bridge.A practical software is developed to find out internal force curves in the whole process when vehicles passing through.The effect is deeply grasped in the process;so that the arch bridge loads of static tests and its equivalent one,and the load level of the running vehicle are d...