摘要
采用动力有限元方法模拟沥青路面在FWD作用下弯沉盆响应,分析土基模量与弯沉盆几何指标之间的关系以及路面开裂、层间滑移和刚性层深度等变量对弯沉盆的影响。计算结果表明:土基模量可由曲率指标CI7和形状指标F8确定;开裂和层间滑移对CI7-F8关系曲线没有影响;当刚性层深度小于7 m时,刚性层深度将对CI7-F8关系曲线产生影响。最后通过实体工程对评价方法进行了验证。
The asphalt pavement deflection basin response was simulated with FWD by dynamic FEM model. The relationship of subsoil modulus with deflection basin parameters was analyzed. Furthermore, the effects of structure cracks, layer interface sliding and depth of rigid layer on deflection basin response were investigated. The resuhs show that （1） the curvature index CI7 and shape factor F8 can be used to determine the subsoil modulus; （2） crack and interface sliding have no influence on CI7-F8 characteristic curve; （3） the depth of rigid layer has impact on CI7-F8 characteristic curve when the depth is lower than 7 m. The method of subsoil condition assessment was verified by FWD measurements from test sections.
出处
《公路交通科技》
CAS
CSCD
北大核心
2009年第12期28-31,共4页
Journal of Highway and Transportation Research and Development
基金
上海市市政工程管理局科技项目(20080302)
关键词
道路工程
土基模量
动力有限元
弯沉盆参数
曲率指标
形状指标
road engineering
subsoil modulus
dynamic FEM
deflection basin parameter
curvature index
shape factor
