移动载荷作用下沥青路面稳态响应与计算

为了研究移动载荷作用下沥青路面稳态响应，将沥青路面看作为作用在Kelvin黏弹性地基 上不仅具有弹性而且具有黏滞性的无限长梁，建立了梁的稳态响应数学模型. 找到了稳态响 应与瞬态响应的关系，由瞬态响应解析解得到了稳态响应近似解析解，并进行了实例计算. 从而解决了稳态数学模型难以求解和计算的问题. 计算结果表明，依所给的道路参数和车辆 载荷，只要响应位置距初始位置一定距离，移动载荷作用下沥青路面的瞬态响应即为稳态 响应.

STEADY DYNAMIC RESPONSE AND CALCULATION ON ASPHALT PAVEMENT SUBJECTED TO MOVING LOAD

In our study on the steady response of asphalt pavement subjected to moving load, the asphalt pavement is considered as an infinite long elastic beam on Kelvin viscous-elastic foundation. The mathematical model of steady response of the beam is established. The relationship between the steady response and the transient response is obtained, an approximate analytic solution of steady response is obtained from the transient response analysis solution. Based on the parameters of road, an example is calculated. The calculation results show that as long as the zone of response is enough far from the initial point, the transient response of the asphalt pavement subjected to some vehicle load is a steady response. Therefore, a simple method is provided for obtaining the asphalt pavement steady response.