市政道路地下通道框架结构计算若干问题研究

Research on Calculation of frame structure of underground passage of municipal road

通过一个算例,建立Midas Civil有限元模型,分析了不同覆土厚度条件下汽车荷载的选取,在覆土厚度较小时汽车荷载应取车辆荷载和车道荷载的不利值。覆土厚度较大时,对比了汽车荷载与土压力的大小关系,超过一定覆土厚度后,汽车荷载可忽略不计。对比两种常用的基底约束模拟方式,得出较为合理的模拟方法。对结构计算过程中其他荷载的取值进行了介绍。

This paper analyzes the selection of vehicle load under the condition of different soil thickness through an example.When the soil thickness is small,the vehicle load should take the unfavorable value of vehicle load and lane load.When the thickness of soil cover is large,the relationship between vehicle load and earth pressure is compared.When the thickness of soil cover is larger,the vehicle load can be ignored.The Midas Civil finite element model is established,and two commonly used simulation methods of base constraint are compared,and a more reasonable simulation method is obtained.The values of other loads in the process of structural calculation are introduced.