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本文研究了沥青路面由于温度和荷载反复作用引起的开裂机理。温度裂纹包括一次降温引起的裂纹和反复降温引起的疲劳裂纹。荷载作用产生的裂纹主要是指荷载反复作用引起的疲劳裂纹。另一类裂纹是反射裂纹,它也是与温度和荷载作用有关的。对于不同原因产生的裂纹,本文分析裂纹的形成和发展,并用光弹试验研究了路面开裂后的应力状态,应力强度因子和裂纹扩展的稳定性问题。
In this paper, the cracking mechanism of asphalt pavement due to the repeated action of temperature and load is studied. Temperature cracks include cracks caused by a cooling and fatigue cracks caused by repeated cooling. Cracks caused by load mainly refers to the fatigue load caused by repeated fatigue cracks. Another type of crack is a reflection crack, which is also related to temperature and load. For the cracks caused by different reasons, this paper analyzes the formation and development of cracks, and uses the photoelastic test to study the stress state, the stress intensity factor and the stability of crack propagation after pavement cracking.