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半刚性基层材料的有效模量值半刚性基层材料的有效模量值

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Keywords: 道路工程,半刚性基层材料,动态模量,衰变规律,有效模量

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Abstract:

现行半刚性基层材料弯拉模量设计值已不能真实反映材料的力学性状。总结了国内外路面结构设计中对半刚性基层弹性模量的选用方法,进行了梁试件的疲劳试验和梁底拉应变的连续测定,研究了弯拉模量衰变规律。结果表明半刚性基层材料在重复加载过程中动态弯拉模量呈现出3个阶段衰变的特征;路面结构设计中,材料模量的有效值的选取应该考虑模量值的阶段性变化。

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