摘要
根据环境条件和功能要求,采用Marshall设计方法完成了沥青混凝土配合比设计,研究了沥青混凝土在不同温度和不同加载频率下的黏弹性行为,分析了铁路沥青混凝土的疲劳使用寿命。结果表明:2S2P1D模型可准确表征铁路沥青混凝土的黏弹特性;沥青混凝土结构在高速列车加载频率下具有良好的耗能能力,有助于降低轨道结构的振动水平;增大沥青混凝土结构厚度,可提高其疲劳使用寿命。
According to the environmental conditions and functional requirements,the mix proportion design of asphalt concrete was completed by using Marshall design method.The viscoelastic behavior of asphalt concrete at different temperatures and loading frequencies was studied,and the fatigue life of railway asphalt concrete was analyzed.The results show that 2S2P1D model can accurately characterize the viscoelastic properties of railway asphalt concrete.Asphalt concrete structure has good energy dissipation capacity under high-speed train loading frequency,which can help to reduce the vibration level of track structure.Increasing the thickness of asphalt concrete structure can improve its fatigue life.
作者
艾强
AI Qiang(China Railway Shenyang Group Co.Ltd.,Shenyang 110001,China)
出处
《铁道建筑》
北大核心
2022年第6期134-137,共4页
Railway Engineering
基金
国家自然科学基金(41972299)。
