首页> 外文期刊>Journal of testing and evaluation >Field and Numerical Evaluation of Traffic Speed Surface Deflection Measurements to Estimate Load-induced Fatigue Response
【24h】

Field and Numerical Evaluation of Traffic Speed Surface Deflection Measurements to Estimate Load-induced Fatigue Response

机译:估计速度引起的疲劳响应的交通速度表面挠度测量的现场和数值评估

获取原文
获取原文并翻译 | 示例
       

摘要

Traffic speed deflection devices (TSDDs) are actively used around the world in network level pavement management applications because of their relative merits over traditional deflection devices (e.g., FWD, Benkelman beam, etc.) in evaluating the pavement structural condition. Past researchers utilized several deflection indices based on FWD surface deflections to estimate critical responses such as load induced fatigue strains at the bottom of the asphalt concrete (AC) layer. However, the differences in loading configuration and viscoelastic material behavior under moving nature of the load of TSDDs may limit the use of the same indices from the FWD deflections to predict those critical responses. The two TSDDs: traffic speed deflectometer (TSD) and rolling weight deflectometer (RWD) were evaluated as a part of a FHWA study at the MnROAD facility in September 2013. Load-induced pavement response data were collected during field tests along with TSDD surface deflection measurements. 3D-Move program was chosen to undertake the analytical modeling since it can model moving load and accommodate the rate-dependent material properties (viscoelastic). A number of indices that are best related to fatigue strain were identified from 48 individual indices. The study verified the capability of TSDD surface deflection measurements to predict the critical fatigue strains at the network level. However, the prediction accuracy can be improved if response lag between the maximum load and the deflection is accounted in the TSD deflection computation algorithm. Evaluation of the RWD device with two surface deflection measurements reveals that both RWD sensors need to be positioned in front of the rear axle to have a better related index to fatigue strains.
机译:由于交通速度偏转装置(TSDD)在评估路面结构状况方面优于传统偏转装置(例如FWD,Benkelman梁等),因此在世界范围的网络级路面管理应用中得到了积极使用。过去的研究人员利用基于FWD表面挠度的几种挠度指数来估算关键响应,例如沥青混凝土(AC)层底部的载荷引起的疲劳应变。但是,在TSDDs的载荷移动特性下,载荷配置和粘弹性材料行为的差异可能会限制使用FWD挠度相同的指标来预测那些关键响应。作为FHWA研究的一部分,2013年9月在MnROAD设施中对交通运输速度偏转仪(TSD)和滚动重量偏转仪(RWD)的两个TSDD进行了评估。在现场测试期间,收集了荷载引起的路面响应数据以及TSDD表面偏转测量。选择3D-Move程序进行分析建模,因为它可以对移动载荷进行建模并适应速率相关的材料特性(粘弹性)。从48个单独的指标中发现了许多与疲劳应变最相关的指标。这项研究验证了TSDD表面挠度测量功能在网络水平上预测临界疲劳应变的能力。但是,如果在TSD挠度计算算法中考虑了最大载荷和挠度之间的响应滞后,则可以提高预测精度。对具有两个表面挠度测量值的RWD设备的评估表明,两个RWD传感器都需要定位在后轴的前面,以具有更好的疲劳应变相关指标。

著录项

  • 来源
    《Journal of testing and evaluation》 |2017年第5期|1702-1712|共11页
  • 作者单位

    Dept. of Civil & Environmental Engineering, University of Nevada -Reno, 1664 N. Virginia St., Reno, NV 89557;

    Dept. of Civil & Environmental Engineering, Univ. of Nevada - Reno, 1664 N. Virginia St., Reno, NV 89557;

    ESC Inc., Turner Fairbank Highway Research Center, 6300 Georgetown Pike, McLean, VA 22101;

    Dept. of Civil & Environmental Engineering, Univ. of Nevada - Reno, 1664 N. Virginia St., Reno, NV 89557;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    field evaluation; fatigue strain; traffic speed surface deflections; deflection indices; TSD; RWD;

    机译:现场评估;疲劳应变交通速度表面偏转;挠度指数;TSD;后轮驱动;
  • 入库时间 2022-08-17 13:31:01

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