摘要
为方便且准确地确定索吊体系桥梁横梁承担的车辆荷载,考虑了弹性支承效应,从理论上分析了车辆荷载在横梁间的分配关系。结果表明:横梁承担车辆荷载效应的大小与主梁抗弯刚度与弹性支承刚度的比值有关。还提出一种简化方法,可以较为高效地求得考虑弹性支承因素后横梁的设计车辆荷载,并通过空间有限元分析验证了这种方法的精度。最后,给出了多个桥梁工程横梁计算时设计车辆荷载的计算结果,供设计人员参考。
Taking account of elastic support effect of cable/suspender supported bridge,the distribution of vehicle loads between crossbeams is analyzed from theory for quick use.The result shows that the vehicle load effect of the crossbeam is related to the ratio of main girder's bending stiffness to elastic support rigidity.Also,a simplified method is introduced to effectively get the computational vehicle loads input on such crossbeams,which is vertified by 3D FEM analysis.In addition,several engineering examples are given for reference.
出处
《上海公路》
2013年第2期22-24,13,共3页
Shanghai Highways
关键词
索吊体系
横梁
弹性支承
车辆荷载
cable/suspender supported bridge
crossbeam
elastic support
vehicle loads
