摘要
为准确评价温度影响下沥青路面结构的抗疲劳性能,解决采用某单一固定温度预估疲劳损伤不够精确的问题,以德国德累斯顿工业大学提出的路面温度场预估模型为例,基于Miner疲劳累积损伤定理,分析路表不同温度及其组合对沥青路面疲劳损伤的影响。通过大量实测的路表温度数据,确定不同的路表温度组合及其组合内温度区间的温度代表值,研究路面结构疲劳损伤变化的规律。分析结果表明:采用由多个温度区间组成的路表温度组合预估疲劳损伤比用某单一固定路表温度预估更精确;组成路表温度组合的温度区间划分越多,路面结构疲劳损伤预估的精度越高;温度区间划分越少,区间内选取不同的温度代表值预估路面结构疲劳损伤差异越大;温度区间内温度代表值取区间上限高温,对沥青路面结构疲劳损伤的影响远比区间下限低温影响大。
To evaluate anti-fatigue performance of asphalt solve the problem of inaccurately prediction of fatigue pavement impacted by temperature effectively and damage by adopting a single fixed temperature, the impact of different surface temperatures and their combinations on fatigue damage in asphalt pavement is analyzed based on Miner law of accumulated fatigue damage, taking the temperature field prediction model of asphalt pavement provided by Dresden University of Technology in Germany for example. According to plenty of measured surface temperature data, different values in temperature intervals are determined surface temperature combinations and and the change regularity of fatigue their representative damage in asphalt pavement is studied. The analysis result shows that （ 1 ） the fatigue damage predicted by adopting surface temperature combinations is more accurate than that predicted by adopting a single fixed temperature; （2） when the number of temperature intervals forming temperature combination is much more, the predicted fatigue damage much less, the （ 3 ） the fatigue in asphalt pavement is more accurate, while when the number of temperature intervals was fatigue damage damage impacted by representative values in temperature intervals varies obviously; impacted by high temperature （ or upper limit） for representative value of temperature intervals is larger than the one by low temperature （lower limit）.
出处
《公路交通科技》
CAS
CSCD
北大核心
2013年第1期1-5,16,共6页
Journal of Highway and Transportation Research and Development
基金
安徽省高等学校省级优秀人才基金项目(2011SQRL114ZD)
安徽建筑工业学院博士启动基金项目
关键词
道路工程
沥青路面
计算机仿真
路表温度组合
疲劳损伤
温度区间
road engineering
asphalt pavement
computer simulation
surface temperatures combination
fatigue damage
temperature interval
