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含裂缝沥青混凝土路面的粘弹性断裂分析

, PP. 18-23

Keywords: 道路工程,沥青混凝土路面,有限元法,松弛应力强度因子,裂缝

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Abstract:

?为了研究含裂缝沥青混凝土路面结构工作性状,基于粘弹性断裂力学理论和平面应变有限元法(FEM),采用ABAQUS有限元软件分析了基准温度、路表变温及裂缝长度对含表面裂缝路面和含反射裂缝路面结构的松弛应力强度因子分布规律的影响。无论是对于含表面裂缝路面结构还是含反射裂缝路面结构,均可得出:路表降温幅度增加使松弛应力强度因子增大且应力强度因子松弛曲线逐渐变缓;基准温度对最大应力强度因子几乎无影响,基准温度越高应力强度因子松弛越快;裂缝长度增加导致应力强度因子增大。

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