| 半刚性基层材料的疲劳特性 |
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| 引用本文： | 沙爱民,贾侃,李小刚.半刚性基层材料的疲劳特性[J].交通运输工程学报,2009,9(3). |
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| 作者姓名： | 沙爱民 贾侃 李小刚 |
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| 作者单位： | 沙爱民,贾侃(长安大学,特殊地区公路工程教育部重点实验室,陕西,西安,710064);李小刚(西安公路研究所,陕西,西安,710054)
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| 基金项目： | 国家西部交通建设科技项目 |
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| 摘 要： | 采用振动法制作了4种半刚性基层材料不同结构类型的梁试件,应用MTS试验机进行了疲劳性能试验,利用Weibull分布函数对疲劳试验结果进行回归分析,建立了不同材料不同结构试件的室内疲劳寿命预估模型,分析了半刚性基层材料的结构类型和弯拉强度对疲劳寿命的影响.分析结果表明:不同半刚性基层材料疲劳方程的回归系数a、b有差别.水泥稳定类材料的疲劳方程除骨架空隙结构类型外均较接近,回归系数a为0.969～1.110,回归系数b为-0.073～0.096.二灰稳定类材料的疲劳方程的回归系数a为1.129～1.173,回归系数b为-0.079～-0.083.0.70应力水平下水泥稳定碎石骨架密实结构的疲劳寿命对数为3.602,悬浮密实结构的为3.118,因此,骨架密实结构的抗疲劳性能优于悬浮密实结构.0.70应力水平下二灰稳定碎石的疲劳寿命对数为5.006,水泥稳定类材料的疲劳寿命对数最大为3.724,因此,前者的抗疲劳性能优于后者.
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| 关 键 词： | 路面工程 半刚性基层 疲劳性能 预估模型 威布尔分布 |
Fatigue performances of semi-rigid base course materials |
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| SHA Ai-min,JIA Kan,LI Xiao-gang.Fatigue performances of semi-rigid base course materials[J].Journal of Traffic and Transportation Engineering,2009,9(3). |
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| Authors: | SHA Ai-min JIA Kan LI Xiao-gang |
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| Institution: | 1.Key Laboratory for Special Area Highway Engineering of Ministry of Education;Chang'an University;Xi'an 710064;Shaanxi;China;2.Xi'an Highway Research Institute;Xi'an 710054;China |
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| Abstract: | Four kinds of beam specimens with different structural types for four semi-rigid base materials were made by using vibration compaction method.The fatigue performance test of semi-rigid base materials was carried out by utilizing material test system(MTS).The results of the test were recursively analyzed by using Weibull's probability distribution function.A series of fatigue prediction models were set up.The effects of the structural types and flexural strengthes of semi-rigid base materials on their fatig... |
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| Keywords: | pavement engineering semi-rigid base course material fatigue performance prediction model Weibull distribution |
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