• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of testing and evaluation >Viscoelastic Asphalt Pavement Simulations and Simplified Elastic Pavement Models Based on an 'Equivalent Asphalt Modulus' Concept
【24h】

Viscoelastic Asphalt Pavement Simulations and Simplified Elastic Pavement Models Based on an 'Equivalent Asphalt Modulus' Concept

机译：基于“等效沥青模量”概念的粘弹性沥青路面模拟和简化的弹性路面模型

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Asphalt pavements exhibit viscoelastic behavior resulting in deflections, strains, and stresses varying with both temperature and traffic speed. For structural thickness design against fatigue cracking, the material response is typically assumed to be linear elastic to simplify the calculation of the critical horizontal strain at the bottom of the asphalt layer. An asphalt modulus representing the response of the materials under average conditions for both temperature and traffic speed is generally adopted in the simplified pavement model. This paper presents a method to determine an equivalent asphalt modulus (EAM) for the asphalt layer. The EAM, when used in the linear elastic analysis of a pavement, will result in a resilient response in terms of the critical strain criterion that is equivalent to the response of that structure when calculated using viscoelastic modeling. The methodology of this paper included a qualitative comparison of the EAM approach with published field results. Two thick asphalt pavement configurations representative of typical French pavement designs were considered in this paper. Results showed expected trends of the equivalent asphalt modulus with changes in traffic speed and temperature. The application of time-temperature superposition principle allowed building pseudo-master curves for the EAM dataset. The effect of different asphalt temperature and different traffic speed on the viscoelastic strains was qualitatively validated against the trends observed under full-scale testing.
机译：沥青路面表现出粘弹性，导致变形，应变和应力随温度和交通速度的变化而变化。对于针对疲劳裂纹的结构厚度设计，通常将材料响应假定为线性弹性，以简化沥青层底部的临界水平应变的计算。在简化的路面模型中，通常采用代表平均温度和行进速度下材料响应的沥青模量。本文提出了一种确定沥青层等效沥青模量（EAM）的方法。当在路面的线弹性分析中使用时，EAM将在临界应变准则方面产生弹性响应，该弹性响应等效于使用粘弹性模型进行计算时该结构的响应。本文的方法论包括EAM方法与已公布的现场结果的定性比较。本文考虑了两种代表典型法国路面设计的厚沥青路面构造。结果显示了等效沥青模量随交通速度和温度变化的预期趋势。时间-温度叠加原理的应用允许为EAM数据集建立伪主曲线。定性地验证了不同沥青温度和不同交通速度对粘弹性应变的影响，并与在全尺寸测试中观察到的趋势进行了对比。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号