• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Airfield and Highway Pavement Specialty Conference; 20060430-0503; Atlanta,GA(US) >Effectiveness of Steel Reinforcing Interlayer Systems on Delaying Reflective Cracking
【24h】

Effectiveness of Steel Reinforcing Interlayer Systems on Delaying Reflective Cracking

机译：钢筋中间层体系对延迟反射裂纹的影响

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

Pavement reflection cracking propagates into the surface due to environmental and vehicular loadings. In order to delay reflection cracking, several interlayer systems have been recently introduced. These interlayer systems may delay reflective cracking by two mechanisms: Reflective cracking can be retarded by using reinforcement systems, which are stiffer than surrounded materials, such as geosynthetics or steel reinforcement. The other mechanism is based on using stress absorption material such as a low modulus material. In this paper, a fracture mechanics approach is used to predict crack initiation and propagation in a pavement overlay with and without interlayer systems. The cohesive zone model (CZM), which has been prevalently employed to simulate crack formation, is adapted for modeling crack development in overlays. Using the aforementioned modeling, crack initiation time and crack propagation rate are obtained. Effectiveness of interlayer systems is quantified based on interface shear stiffness as well as hot-mix asphalt (HMA) temperature. The steel reinforcement interlayer was found to delay the initiation and propagation of reflective cracking. This retardation of reflective cracking is affected by the interface shear stiffness; hence, suggests the importance of proper bonding at the interface. Improper installation of steel reinforcement netting may cause local and global debonding at interface between interlayer and surrounded layers. Consequently, this behavior at interface affects the initiation and propagation of reflective cracking.
机译：由于环境和车辆负荷，路面反射裂缝传播到表面中。为了延迟反射裂纹，最近已经引入了几种夹层系统。这些夹层系统可能通过两种机制延迟反射裂纹：可以通过使用增强系统来延迟反射裂纹，增强系统比周围的材料（如土工合成材料或钢增强材料）更坚硬。另一种机理是基于使用应力吸收材料，例如低模量材料。在本文中，采用断裂力学方法来预测有无夹层系统的路面覆盖层中的裂纹萌生和扩展。普遍用于模拟裂纹形成的内聚区模型（CZM）适用于对覆盖层中的裂纹发展进行建模。使用上述模型，可以获得裂纹萌生时间和裂纹扩展速率。基于界面剪切刚度以及热混合沥青（HMA）温度来量化夹层系统的有效性。发现钢筋增强夹层延迟了反射裂纹的产生和传播。反射裂纹的这种延迟受界面剪切刚度的影响。因此，表明在界面处进行适当粘合的重要性。钢筋网的不正确安装可能会导致中间层和被包围层之间的界面处的局部和整体剥离。因此，界面处的这种行为会影响反射裂纹的产生和传播。

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