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| 轴载对复合式路面应力吸收层荷载应力的影响 | |
| 引用本文： | 李祖仲,王伯禹,陈拴发.轴载对复合式路面应力吸收层荷载应力的影响[J].长安大学学报(自然科学版),2012,32(1):20-25. |
| 作者姓名： | 李祖仲 王伯禹 陈拴发 |
| 作者单位： | 1. 长安大学材料科学与工程学院,陕西西安710061／中国石油独山子石化公司,新疆克拉玛依,833600 2. 湖北省交通运输厅汉十高速公路管理处,湖北武汉,430051 3. 长安大学材料科学与工程学院,陕西西安,710061 |
| 基金项目： | 交通运输部西部交通建设科技项目(2008 318 812 10);中央高校基本科研业务费专项资金项目(CHD 2010JC011) |
| 摘 要： | 研究改性沥青混合料应力吸收层在复合式路面结构中的受力状态,对于其材料组成设计具有指导意义。采用有限元数值分析方法,建立基于应力吸收层的复合式路面三维有限元模型,分析轴载、模量变化对应力吸收层荷载应力的影响。结果表明：应力吸收层本身处于极为不利的受力状态,刚性基层接缝处应力吸收层层底存在应力集中,应力增长了60%,其模量越低,应力集中越明显,层内荷载应力呈3阶多项式函数变化;应力吸收层层内荷载应力随轴载增加呈线性增长,轴载变化对层底荷载应力影响最显著。 |
| 关 键 词： | 道路工程 复合式路面 应力吸收层 轴载 荷载应力 三维有限元 |
Impact of axle load on load stress of stress absorbing layer in composite pavement |
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| LI Zu-zhong,WANG Bo-yu,CHEN Shuan-fa.Impact of axle load on load stress of stress absorbing layer in composite pavement[J].JOurnal of Chang’an University:Natural Science Edition,2012,32(1):20-25. | |
| Authors: | LI Zu-zhong WANG Bo-yu CHEN Shuan-fa |
| Institution: | 1(1.School of Material Science and Engineering,Chang’an University,Xi’an 710061,Shaanxi,China; 2.Management Office of Hanshi Freeway,Department of Transportation of Hubei Province Government,Wuhan 430051,Hubei,China;3.Dushanzi Petrochemical Company, PetroChina,Kelamayi 833600,Xinjiang,China) |
| Abstract: | There is a guiding significance to study the stress states of stress absorbing layer of modified asphalt mix in composite pavement,especially for the material composition design.This paper established 3D finite element model based on the stress absorbing layer in composite pavement by finite element numerical analysis method,and analyzed the influence of axle load and the modulus of stress absorbing layer on the loading stress of stress absorbing layer.The results indicate that stress absorbing layer are in extremely detrimental stress state and there is stress concentration on its bottom beside junctures of rigid base,the percentage of stress growth in its bottom is more than 60%,and the lower the modulus of the stress absorbing layer,the more obvious the stress concentration is.In addition,the load stress changes as third-order polynomial function with its thickness.Especially,the loading stress in stress absorbing layers grows linearly as axle load rising,and axle load has the most remarkable impact on the stress of its bottom. |
| Keywords: | road engineering composite pavement stress absorbing layer axle load load stress 3D finite element |
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