摘要
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%.
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 determined.It is shown that for the circular arches,the largest bending moments at arch springing occurs in the case of the heaviest axes near the midspan,that is in good agreement with the bridge on active duty.The whole process curve is convenient to comparing with load level such as city level-A larger 6.34% than highway-level-I.And overload more than 113% is gotten on a provincial line.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2011年第2期235-238,共4页
Engineering Journal of Wuhan University
关键词
拱桥
影响线
全过程曲线
静载试验
arch bridge
influence line
whole process curve
static loading test
