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建立了CRC+AC复合式路面结构模型,在搜索层间最大剪应力发生位置的基础上,分析了AC层厚度、模量和层间结合状态等对层间剪应力的影响水平,以及层间剪应力对模量和层间结合状态的响应规律。结果表明:单轴双轮组作用下CRC+AC复合式路面的层间最大剪应力发生在靠近荷载中心一侧的当量单圆的0.8δ圆周与135°或225°线的交点附近;剪切弹性柔量对层间最大剪应力的影响最大、AC层弹性模量次之、AC层厚度最小;层间最大剪应力随层间结合状况的减弱而上升,良好的层间黏结措施对减少层间剪切破坏意义重大;气温降低时AC层模量对层间最大剪应力的影响大于气温升高时,季节性冰冻地区在层间结构设计时需重视气温条件对沥青混合料模量的影响。
The model of CRC + AC composite pavement structure is established. Based on the location of the maximum shear stress between layers, the influence of AC thickness, modulus and interlayer bonding on the interlaminar shear stress is analyzed. Response of shear stress to modulus and interlayer bonding. The results show that the maximum interlaminar shear stress of the CRC + AC composite pavement under the uniaxial and double-wheel set occurs near the intersection of 0.8δ circle and 135 ° or 225 ° line of equivalent single circle near the load center. The elastic compliance has the greatest influence on the maximum shear stress between layers. The elastic modulus of AC layer is the second, and the thickness of AC layer is the smallest. The maximum interlaminar shear stress increases with the weakening of interlaminar bonding condition. Interlaminar shear failure is of great significance. When the air temperature decreases, the effect of AC layer modulus on the interlaminar maximum shear stress is greater than that of air temperature. In the seasonal freezing area, the influence of air temperature on the asphalt mixture modulus should be emphasized .