聚酯玻纤布防治荷载型反射裂缝的断裂力学分析  

Fracture mechanics analysis on reflective cracking resistance of treatment with fiberglass-polyester paving mat

作　　者：胡学亮[1] 杨文军 朱洪洲[1] 韦刚 

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆高速公路发展有限公司垫利分公司,重庆400060

出　　处：《交通科学与工程》2009年第2期13-18,共6页Journal of Transport Science and Engineering

基　　金：重庆市交通委员会科技项目(JK2007-31)

摘　　要：基于断裂力学的方法,采用ANASYS软件模拟沥青路面典型结构,分析了设置聚酯玻纤布夹层后,在正载和偏载作用下,裂缝尖端应力强度因子的变化,研究了沥青层模量、基层厚度及裂缝扩展深度等结构参量及层间接触条件和夹层模量对应力强度因子的影响规律.分析结果表明,设置聚酯玻纤布夹层,可以有效防治荷载型反射裂缝的扩展.Based on the fracture mechanics approach, the finite element method analyzed a varity of the stress intensity factor at the pavement crack tip when setting fiberglass-polyester paving mat, and the effect of the stress intensity factor in symmetric load and asymmetric load was studied when the asphalt layer modulus, thickness of semi-rigid base, the the depth of the crack,touch condition, interlay modular, etc. , changed. The results show that setting fiber- glass-polyester paving mat was a treatment with reflective cracking resistance.

关 键 词：有限元 应力强度因子 反射裂缝 聚酯玻纤布 

分 类 号：U418.8[交通运输工程—道路与铁道工程]