摘要
以京化(北京-阳原县化稍营)高速公路二期路基工程为研究对象,借助非线性有限元数值分析软件AN-SYS进行了数值仿真模拟,研究分析车辆动荷载作用下路基的动力特性。结果表明:车辆动荷载作用下,路基动应力随深度的增加而呈衰减趋势;车辆动荷载对路基竖向动应力值σy影响较大,而水平向动应力值σx影响相对较小;车速差异对路基动应力值影响显著;动应力值沿水平方向衰减较快,其传递距离存在一定的范围。
Take phase II subgrade project of Beijing to Huashaoying, Yangyuan expressway for research, numerical simula-tion with the nonlinear finite element analysis software ANSYS, this paper analyzed the dynamic characteristics of subgrade under vehicles dynamic load. The results showed that： under vehicle dynamic loads, subgrade dynamic stress showed an attenuation trend with increasing depth ; the effect of vehicle dynamic load on subgrade vertical dynamic stress try is great, and horizontal dy- namic stress o＇~ is relatively small; the effect of speed differences on the subgrade dynamic stress value is great; dynamic stress value along the horizontal direction decreases rapidly, and there is a certain range in pass distance. Keywords： highway sub- grade ; dynamic response ; finite element ; dynamic load ; simulation analysis
出处
《内蒙古公路与运输》
2012年第3期21-23,共3页
Highways & Transportation in Inner Mongolia
关键词
公路路基
动力响应
有限元
动荷载
模拟分析
subgrade of highway
dynamic response
finite elements method
dynamic loading
simulation analysis
