论文部分内容阅读
对典型的沥青路面结构建立了三维粘弹性有限元模型,并对其有效性进行了验证.分别研究了荷载模式(矩形、半正弦和三角形荷载)和温度等因素对沥青路面路表弯沉、沥青层底水平拉应变和土基顶面压应变粘弹性响应的影响.发现温度越高,粘弹性响应峰值和残余响应越大,且矩形荷载下得到的响应峰值和残余响应都大于半正弦和三角形荷载下的响应峰值.在循环荷载作用下,粘弹性响应峰值和残余响应逐渐累积,并且逐渐趋于稳定,且温度越高,达到稳定所需的循环次数越多.研究表明对沥青路面结构采用回弹参数进行线弹性理论分析有其合理性,但这种简化分析可能不能反映材料或结构完整的行为特性.
A three-dimensional viscoelastic finite element model is established for a typical asphalt pavement structure, and its effectiveness is verified. The effect of load mode (rectangular, half sine and triangular load) and temperature on the road surface deflection of asphalt pavement, The results show that the higher the temperature is, the greater the peak value of viscoelastic response and the residual response are and the response peak and residual response obtained under rectangular load are both greater than half-sine and The response peak under triangular load.The peak and residual response of viscoelastic response gradually accumulate and gradually become stable under cyclic loading, and the higher the temperature, the more the cycle required to achieve stability.The study shows that the asphalt pavement structure It is reasonable to use the springback parameters to analyze the linear elastic theory, but this simplified analysis may not reflect the complete behavior of materials or structures.