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考虑实测轮载的动态模量加载波形及荷载作用时间取值研究

, PP. 22-27

Keywords: 道路工程,加载波形,作用时间,三维有限元,动态模量,实测轮载接地压力

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Abstract:

利用三维有限元计算工具,考虑沥青路面结构层不同的模量和厚度组合,结合实测的竖向轮胎-路面接地压力并考虑水平作用力,分析沥青路面结构层不同深度处的竖向应力脉冲波形。分析结果表明同一沥青路面结构层不同深度处,不仅其竖向应力脉冲波形不相同,波长也不一样;也就是说,对同一路面结构不同深度处动态模量的确定,除了需要考虑不同的实验室加载波形和加载频率以外,还需要对荷载作用时间的取值做出修正。

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