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为了研究动荷载作用下纤维沥青路面的响应,基于弹性理论,应用有限元方法分析单周期动荷载作用下,不同的荷载作用时间、路面体阻尼比、土基模量和加载方式对不同纤维沥青路面结构的路表最大弯沉的影响规律.对于不同纤维沥青路面结构:不同荷载作用时间下,路面的动静态弯沉差值基本接近;随着路面体阻尼比的逐渐增加,路面的动态弯沉逐渐减小,但减小率和到达最大动弯沉对应的时间基本接近;随着土基模量的逐渐增加,路面的动态弯沉逐渐减小,但减小率基本接近;半矩形波荷载比半正弦荷载作用下的路面动态弯沉大,而弯沉差值基本接近.分析表明,在单周期动荷载作用下,纤维的加入提高了路面的整体抗变形能力,但对路面的动态弯沉影响规律基本相同.
In order to study the response of the fiber asphalt pavement under dynamic load, based on the elastic theory, the finite element method was used to analyze the influence of different loading time, pavement damping ratio, soil modulus and loading mode on different fiber asphalt Pavement structure of the maximum deflection of the road table for different fiber asphalt pavement structure: different load time, the static and dynamic deflection of the pavement close to the basic value; with the pavement damping ratio gradually increased, the dynamic curve of the road But the decreasing rate is almost the same as that of reaching the maximum dynamic deflection. With the increase of the modulus of the soil foundation, the dynamic deflection of the road surface gradually decreases, but the reduction rate is basically close to that of the semi-rectangular wave The dynamic deflection of the pavement is larger than that of the semi-sinusoidal load, while the difference of the deflection is basically close. The analysis shows that the addition of fiber improves the overall deformation resistance of the pavement under the action of single periodic dynamic load, The effects of deflection are basically the same.