应用能量原理预测沥青混合料的疲劳破坏  

Predicting Fatigue Failure of Bituminous Mixture Using Energy Dissipation

作　　者：张婧娜[1] 谭忆秋[2] 张肖宁[2] 

机构地区：[1]同济大学道路与交通工程系 [2]哈尔滨建筑大学

出　　处：《中国公路学报》1998年第4期11-17,共7页China Journal of Highway and Transport

基　　金：国家自然科学基金

摘　　要：对不同沥青品种、不同级配类型的１０种沥青混合料进行了劈裂疲劳及劈裂蠕变试验，分析了两种试验的联系及其必然性。用疲劳与蠕变的应力比分析了疲劳与蠕变试验结果的差异，并应用能量耗散理论分析蠕变累积能耗与疲劳蠕变应力比的关系，最终建立了用蠕变试验的累积流动能耗预测沥青混合料疲劳性能的统计方程。对建立的预测方法用疲劳方程等进行了检验。Based on the energy dissipation indicator, a new prediction method of fatigue properties of bituminous mixtures is presented. Ten types of mixtures consisted of different penetration grades bituminous and aggregate gradation are subjected to the indirect tensile splitting test to assess their fatigue and creep performance. The differences between fatigue and creep experimental properties of the mixtures are described by the stress ratio analyzing the relationship between fatigue and creep tests results. The relationship between cumulative energy and stress ratio is analyzed based on the dissipated energy theory. Finally, the statistical equation correlating creep cumulative energy and stress ratio is derived as the prediction model. The predicting model is verified by fatigue equations.

关 键 词：疲劳破坏 蠕变性能 能量消散原理 沥青混合料 

分 类 号：U414.75[交通运输工程—道路与铁道工程]