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运用损伤理论研究和分析了旧水泥混凝土路面上沥青罩面层的反射裂缝。为了反映旧水泥混凝土路面上沥青加铺层的实际工作状况,提出引用损伤变量的力学模型,详细介绍沥青加铺复合结构的荷载应力的平面有限元计算方法,并编制相应的程序。通过程序模拟在荷载作用下沥青加铺层中反射裂缝的产生和发展,并分析各结构层模量、夹层参数、层间接触条件以及板底脱空对加铺层工作性能的影响。
The damage theory is used to study and analyze the reflection crack of asphalt overlay on the old cement concrete pavement. In order to reflect the actual working condition of asphalt overlay on the old cement concrete pavement, a mechanical model of the damage variable is proposed. The finite element method for calculating the load stress of asphalt pavement composite structure is introduced in detail and the corresponding program is compiled. The generation and development of reflection cracks in asphalt overlay under load were simulated by program, and the influence of various structural layer modulus, interlayer parameters, interlayer contact conditions and underfloor voidage on the workability of overlay was analyzed.