| 摘要: |
| 采用三维有限元动力分析模型,分析了重载移动作用下轴载重量、轴载速度、路面结构参数等因素变化,对沥青路面动态响应的影响.结果表明:路面动态响应随着轴重的增加呈线性显著增加;轴载速度对路面动态响应有一定的影响,路面结构动态响应随轴载速度的增加呈现先增加再降低的趋势,重载车辆以常见速度运行时,对路面结构产生的疲劳破坏影响显著大于静载产生的疲劳破坏;路面结构参数中,面层厚度对路表剪应力、路表竖向压应力影响特别显著,路基模量对路表弯沉、底基层拉应力、路基顶面压应变影响特别显著. |
| 关键词: 沥青路面 重载 动态响应 敏感性 有限元分析 |
| DOI： |
| 分类号: |
| 基金项目:上海师范大学一般科研项目(A-3101-12-001047) |
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| Sensitivity analysis of asphalt-pavement structure dynamic responses under heavy load |
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ZHANG Lijuan
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College of Civil Engineering,Shanghai Normal University
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| Abstract: |
| With the 3-Dimensional finite-element dynamic model,the influence of axis-load,axis-speed,and pavement structure parameters on dynamic performance of pavement structure is studied.The results show that with the increase in load,the dynamic response of pavement is nearly proportional to axis-load and increases noticeably;Axis-speed influences the dynamic response to some extent.With the increase of axis-speed,dynamic response of pavement structure increases firstly.With axis-speed further increasing,dynamic response of pavement structure then decreases gradually.For fatigue failure,the influence of heavy-load with common moving speed is much greater than that of static load.Among the pavement structure parameters,thickness of surface-layer has a significant effect on shear stress and the compression stress at road surface.Subgrade modulus has a significant effect on road surface deflection,tensile stress at the bottom of subbase,and compression-strain at the top of subgrade. |
| Key words: bituminous pavement heavy load dynamic response sensitivity analysis asphalt pavement |
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