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考虑环境因素的沥青路面疲劳开裂预估模型

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Keywords: 道路工程,沥青路面,实证分析,疲劳开裂,环境因素,预估模型

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Abstract:

?为了延长沥青路面使用寿命,针对不同荷载环境与自然环境作用下的沥青路面疲劳开裂病害,依据疲劳开裂准则,得到了沥青路面结构层状况参数及荷载-轴型参数等预估变量,构建了考虑环境因素的沥青路面疲劳开裂预估模型。推荐采用“超限疲劳寿命折减率”作为沥青路面结构疲劳寿命折减评价指标,提出了沥青路面疲劳寿命折减评价步骤。结合上海地区7条道路,对不同荷载作用下路面结构疲劳寿命进行了计算。结果表明:当车辆荷载超限25%时,各条道路疲劳寿命折减了45%~50%;当荷载超限100%时,疲劳寿命折减了85%~88%。

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