基于交通荷载作用的道路地下塌陷模型研究  

Research on Road Collapse Model Based on Traffic Load

作　　者：付大伟[1] 庄宇[2] FU Da-wei;ZHUANG Yu(College of Civil Engineering,Changchun Institute of Technology,Changchun Jilin 130012,China;College of Architectural Engineering,Jiamusi University,Jiamusi Heilongjiang 154002,China)

机构地区：[1]长春工程学院土木工程学院,吉林长春130012 [2]佳木斯大学建筑工程学院,黑龙江佳木斯154002

出　　处：《计算机仿真》2021年第9期288-291,333,共5页Computer Simulation

摘　　要：随着社会的不断发展,因交通作用导致的道路地下塌陷问题已经屡见不鲜。为此,分别从交通荷载特性和路面动力特性两方面进行分析研究,通过路面弹性模量与路面应变的关系模拟道路地面结构层中的路面效应。然后把路面结构划分成有限个单元,并将其进行离散化处理,通过对位移、速度和加速度三个矢量进行不断的迭代处理,直到达到收敛状态。再次通过有限元模型的计算,分析研究交通工具行驶过程荷载的不平稳增长对路面结构疲劳损伤的影响。最后选取5种常见的不同轴载车辆,分别从位移和应力两方面进行分析,研究其对道路路面上施加的静荷载稳定性以及路面结构稳定性的影响。通过对道路路面上监测节点的测试,证明了上述方法可以准确预测出车辆的非平稳增长对路面所造成的疲劳损伤,同时说明了对交通荷载的非平稳增长加以考虑是非常必要的。With the continuous development of society, the problem of road underground collapse caused by traffic has been common.Therefore, this paper analyzed and studies the traffic load characteristics and pavement dynamic characteristics respectively, and simulated the pavement effect in the road surface structure layer through the relationship between pavement elastic modulus and pavement strain.Then the pavement structure was divided into finite elements and discretized.The displacement, velocity, and acceleration vectors were iterated continuously until the convergence state was reached.Thirdly, through the calculation of the finite element model, the influence of non-stationary load growth on pavement structure fatigue damage was analyzed.Finally, five kinds of common vehicles with different axle loads were selected and analyzed from displacement and stress respectively to study the influence of static load stability and pavement structure stability on the road surface.Through the test of the monitoring nodes on the road surface, it is proved that the method can accurately predict the fatigue damage of the road caused by the non-stationary growth of vehicles.Therefore, it is necessary to consider the non-stationary growth of traffic load.

关 键 词：交通荷载 离散化处理 疲劳损伤 非平稳增长 

分 类 号：TU46[建筑科学—结构工程]