应用J积分断裂准则评价应力吸收层抗裂性能(英文)

Evaluation Fracture Resistance of Stress Absorbing Layer Using J-Integral Fracture Criterion

应用弹塑性断裂力学J积分理论,采用半圆弯曲试验评价了3种级配应力吸收层的抗裂性能,发现采用断级配设计的应力吸收层具有良好的抗裂性能,结果表明断裂韧度JC可以用来评价应力吸收层的抗裂性能,由丰富沥青胶浆填充断级配骨架结构的级配设计,可以提高沥青混合料的抗裂能力。

Fracture resistance of three kinds of stress absorbing layers were evaluated based on the J-integral theory of elasticity-plasticity fracture mechanics by semi-circular bending test, and the critical fracture resistance were compared with relative study. It is shown that gap gradation stress absorbing layer has the better fracture resistance. The results indicate that the critical fracture resistance-jcis appropriate to appraise the fracture resistance of stress absorbing layer, and the gap gradation asphalt mixtures with skeleton structure and full asphalt binders can increase its fracture resistance.