• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Pavements and materials : Modeling, testing, and performance >State of the Art: Anisotropic Characterization of Unbound Aggregate Layers in Flexible Pavements
【24h】

State of the Art: Anisotropic Characterization of Unbound Aggregate Layers in Flexible Pavements

机译：最新技术：柔性路面中未粘结骨料层的各向异性特征

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

The main objective of this paper is to present the state-of-the-art in the anisotropic characterization of unbound aggregate layers to support the development of the next generation of highway as well as airport pavement infrastructure by employing advanced technology and detailed knowledge gathered within the last one and a half decades in characterization of the actual stress- and direction- (anisotropic) dependent aggregate behavior. From advanced triaxial tests conducted in the laboratory, unbound aggregate materials are clearly shown to have greater modulus in the vertical direction, which can be adequately modeled using cross-anisotropic, stress-dependent modulus characterization models. Field validations of the anisotropic aggregate layer behavior have involved comparing measured full-scale pavement test section responses with the predicted ones using the anisotropic aggregate modulus characterization. A simplified approach of obtaining level of anisotropy as an aggregate quality indicator is summarized to indicate use of high quality aggregates with superior properties, including size, gradation and shape, critical to successful pavement designs. Recent efforts as well as the need to develop simplified design and analysis methodologies that will enable optimized use of engineered aggregate structural layers for improved performance and increased use in flexible pavements are also discussed in detail.
机译：本文的主要目的是通过应用先进的技术和详细的知识，介绍未结合骨料层的各向异性表征的最新技术，以支持下一代高速公路以及机场路面基础设施的发展在过去的十五年中，对实际应力和方向（各向异性）相关的骨料行为进行了表征。从实验室进行的高级三轴测试可以清楚地看出，未结合的骨料在垂直方向上具有更大的模量，可以使用跨各向异性，应力相关的模量表征模型对其进行适当建模。各向异性骨料层性能的现场验证涉及使用各向异性骨料模量表征将实测全尺寸路面试验断面响应与预测的响应进行比较。总结了一种获得各向异性水平作为骨料质量指标的简化方法，以表明使用具有优异性能的高质量骨料，包括对成功路面设计至关重要的尺寸，等级和形状。还详细讨论了近期的工作以及开发简化的设计和分析方法的需求，这些方法将能够优化使用工程骨料结构层以提高性能并增加在柔性路面中的使用。

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