低温下基于断裂力学的ISAC防反射裂缝

Study of Anti-Reflective-Cracking of ISAC Based on Fracture Mechanics in Low-Temperature

为了有效解决在使用CC-AC复合式路面时出现反射裂缝的问题,对设置复合式应力吸收夹层(In-terlayer Stress Absorbing Composite,简称ISAC)的复合式路面结构的力学响应及结构设计方法进行系统研究.根据断裂力学理论,重点针对低温不利情况,通过计算设与不设ISAC复合式路面结构最不利位置的应力强度因子,分析了ISAC的防裂优势.

To effectively solve the problem of reflective crackings before using CC-AC composite pavement, the compound road which set ISAC （ Interlayer Stress Absorbing Composite） is studied, and systematically the road mechanical responses and the structural design method are discussed. Focusing on unfavorable conditions of the low-temperature based on fracture mechanics theory, the ISAC advantages of preventing reflective crack are an- alysed by calculating the stress intensity factor of the composite pavement with and without seting ISAC at the most unfavorable position.