车辆动荷载下沥青路面力学响应分析  

Dynamic Analysis of Asphalt Pavement Response Under Moving Loading

作　　者：袁美俊[1] 纪小平[2] 邢钦玉 张波[2] 

机构地区：[1]江苏省交通技师学院,江苏镇江212006 [2]长安大学公路学院,陕西西安710054 [3]路桥华东工程有限公司,上海200135

出　　处：《华东交通大学学报》2009年第6期21-25,共5页Journal of East China Jiaotong University

摘　　要：为了分析路面结构在行车动荷载作用下的力学响应,建立了单自由度1/4车辆模型和以正弦曲线模拟路面不平整度的模型,通过将不同路面状况和行车速度的组合,分析车辆在各情形下所产生的动荷载,发现路面传给车辆的激励振动频率接近车辆自身振动频率时,车辆对路面产生的动荷载值最大。采用ANSYS静态和瞬态三维有限元方法,计算车辆在静态以及不同速度、不同路面状况下沥青路面面层层底水平拉应变和面层内最大压应变,总体来看采用静态荷载进行路面结构设计是偏安全的。To analyze the response of pavement structure under moving loading, a quarter vehicle model with single freedom degree and unevenness model are established. The dynamic loads are calculated through combining different pavement conditions and speed. When the incentive frequency which is passed to vehicles by the road is close to its own vibration frequency, vehicles will produce the greatest dynamic load. Three-dimensional finite element method is used to calculate the stress and strain of different layer with various speeds under static or dynamic loads. The results conclude that design of pavement structure by static load is safe.

关 键 词：移动荷载 沥青路面 三维有限元 车速 

分 类 号：U416.01[交通运输工程—道路与铁道工程]