摘要
运用损伤力学原理,从力学近似角度出发,分析钢桥面双层沥青混合料铺装结构体系的疲劳损伤演化规律,推导出钢桥面双层沥青混合料铺装结构体系的损伤场、应力应变和疲劳寿命的预测公式,并以南京四桥现场摊铺、碾压成型的复合梁疲劳试验为例,验证所推导模型的可靠性。研究结果表明:本文模型的预测结果与实验结果较为接近,误差在8%以内,具有较高的可靠性。利用本文推导的模型能较准确预测钢桥面双层沥青混合料铺装结构体系的疲劳寿命。
In this study,based on the damaged mechanics principle,the fatigue damage evolution law of a doublelayer asphalt mixture paving system on steel bridge deck was analyzed from the perspective of mechanicalapproximation.Also some prediction formulas of damaged field,stress-strain relationship and fatigue life of thepaving system were proposed.Fatigue tests of compound beams were prepared at a paving layer construction siteof Nanjing’s fourth Yangtze river’s bridge and used to validate the reliability of established models.Resultsindicated that predicting values from established models were closed to those from experimental measurementswith a deviation rang of8%.This suggests that the proposed prediction formulas were reliable.This studyconcludes that the established models can be used to accurately predict the fatigue life of a double layer asphaltmixture paving system on steel bridges’decks.
作者
柳富勇
王宏畅
魏洋
李国芬
LIU Fuyong;WANG Hongchang;WEI Yang;LI Guofen(School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2017年第9期1899-1906,共8页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51608273)
江苏省"青蓝工程"资助项目(QL2017)
江苏交通科技资助项目(2010Y34)
中国交通运输部部省联合攻关资助项目(2010-353-332-100)
关键词
损伤分析
疲劳寿命
复合梁疲劳试验
双层沥青混合料铺装
钢桥面
damage analysis
fatigue life
fatigue test on compound beam
double layer asphalt mixture paving system
steel bridge deck
