Estimation of Fatigue Failure of Asphalt Concrete Based on Three-Parameter Weibull Distribution

doi:10.3969/j.issn.1674-0696.2017.01.07

Journal of Chongqing Jiaotong University(Natural Science) ›› 2017, Vol. 36 ›› Issue (1): 36-41.DOI: 10.3969/j.issn.1674-0696.2017.01.07

• Highway & Railway Engineering • Previous Articles Next Articles

Estimation of Fatigue Failure of Asphalt Concrete Based on Three-Parameter Weibull Distribution

LI Xiao1，2，LIANG Naixing2，CHENG Zhihao1

（1. National Engineering Laboratory for Surface Transportation Weather Impacts Prevention, Broadvision Engineering Consultants, Kunming 650041, Yunnan, P.R.China;2. School of Civil Engineering, Chongqing Jiaotong University，Chongqing400074，P.R.China）

Received:2015-09-21 Revised:2015-11-19 Online:2017-01-20 Published:2017-02-08

三参数Weibull分布估计沥青混凝土疲劳失效研究

黎晓1，2，梁乃兴2，程志豪1

（1.云南省交通规划设计研究院陆地交通气象灾害防治技术国家工程实验室，云南昆明650041；2.重庆交通大学土木工程学院，重庆400074）

作者简介:第一作者：黎晓（1982—），男，重庆人，工程师，博士，主要从事沥青路面结构分析和道路建材方面的研究。E-mail: prettylousy@163.com。
基金资助:
云南省交通运输厅科技项目基金［云交科教2014［231］-（二）］；云南省科技创新强省国际科技合作专项基金（2009AC0009）

Abstract

Abstract: Weibull distribution is widely used in asphalt mixes fatigue failure fitting. Compared with two-parameter Weibull distribution, three-parameter Weibull distribution shows better practicability in the situation that fatigue failure does not exist at initial steps. Through indirect tension test （IDT） at different stress levels and different temperatures, the fatigue behavior of three different asphalt concrete were analyzed with location parameter using iterative computations of scale parameter, shape parameter. Combined with test data, the distribution function was calculated based on three characteristic parameters. The results show more reasonable fitting accuracy of three-parameter Weibull distribution than its calculated results by others methods. The fatigue curves and fatigue equations at different test conditions of 50% reliability are obtained.

Key words: road engineering, asphalt concrete, stress control, three-parameter Weibull distribution, estimation of fatigue failure

摘要： 通过间接拉伸疲劳试验分析3种不同沥青混凝土材料在3种不同温度条件下疲劳失效特性。采用考虑形状参数、位置参数和尺度参数的Weibull分布函数对不同加载条件下材料疲劳寿命分布特征进行估计，提出了基于位置参数迭代计算下的特征参数估算方法，并给出了50%保证率下的材料疲劳寿命曲线和疲劳方程。研究结果表明：三参数Weibull分布函数可以避免在试验初始阶段进行疲劳失效概率的不合理估计，更好地预估小子样条件下材料疲劳失效分布；预估结果中特征参数项具有良好的线性相关性，三参数Weibull分布能较为清晰地反映出材料不同试验条件下的疲劳失效寿命分布。

关键词: 道路工程, 沥青混凝土, 应力控制, 三参数Weibull分布, 疲劳失效估计

CLC Number:

U416.217

LI Xiao1，2，LIANG Naixing2，CHENG Zhihao1. Estimation of Fatigue Failure of Asphalt Concrete Based on Three-Parameter Weibull Distribution[J]. Journal of Chongqing Jiaotong University(Natural Science), 2017, 36(1): 36-41.

黎晓1，2，梁乃兴2，程志豪1. 三参数Weibull分布估计沥青混凝土疲劳失效研究[J]. 重庆交通大学学报（自然科学版）, 2017, 36(1): 36-41.

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Estimation of Fatigue Failure of Asphalt Concrete Based on Three-Parameter Weibull Distribution

三参数Weibull分布估计沥青混凝土疲劳失效研究

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