• 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) >Analysis of Airfield Concrete Slabs Connected by Continuous Elastic Joints
【24h】

Analysis of Airfield Concrete Slabs Connected by Continuous Elastic Joints

机译：连续弹性接头连接的机场混凝土板分析

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

Many studies have been conducted on the abilities of jointed concrete pavements to transfer load from one slab to the next. Finite elements procedures, layered elastic back-calculations schemes, and empirical correlations have been used in the past to account for this load transfer efficiency. With the purpose of designing concrete pavements, specific load transfer efficiencies have been pre-established based on studies from in-service pavements. However, load transfer provided by friction (shear) and dowels across joints will significantly impact the resulting tensile stresses imparted by gear loads. Gear geometry, as well as position of tires relative to the joint, also influences the maximum stresses acting at the bottom of the slabs. This paper describes an analytical procedure for the calculations of stresses and deflections in concrete pavements with continuous elastic joints due to aircraft loads. The analytical methodology, which was originally developed by Skarlatos in 1949, under the supervision of H.M. Westergaard, has been in obscurity for many years. The methodology was recently brought to light by Hammons and Ioannides in 1996 in an U.S. Army Engineer Research and Development Center (ERDC) report discussing the load transfer efficiency of concrete slabs subjected to a Boeing 777 landing gear. The general equations for the solutions of stresses and deflections under point loads acting across a joint are presented and solved by numerical integration techniques. The solution technique is capable of computing stresses and deflections at any location in the loaded and adjacent slabs under any gear or load configuration. This numerical solution has been implemented into a computer program and was used to analyze a Boeing 777 landing gear moving across a joint. The computed deflections on both sides of the joint were compared to actual field measurements and with finite element predictions made by Hammons and Ioannides (1996). This simpler analytical procedure produced results that compared just as well with measured data as did the results of the more sophisticated finite element procedure. This simpler solution technique should be of great value for engineers designing and analyzing jointed concrete pavements. This analytical tool will be extended and later recommended to be used as the basis for the design and evaluation of concrete pavements for the military.
机译：关于节理混凝土路面将荷载从一块板转移到另一块板的能力，已经进行了许多研究。过去已使用有限元程序，分层弹性反计算方案以及经验相关性来说明这种载荷传递效率。为了设计混凝土路面，已经根据在役路面的研究预先确定了特定的荷载传递效率。但是，由摩擦（剪切）和销钉穿过关节提供的载荷传递将显着影响齿轮载荷所产生的拉伸应力。齿轮的几何形状以及轮胎相对于接头的位置也会影响作用在平板底部的最大应力。本文介绍了一种计算程序，该程序用于计算由于飞机载荷而具有连续弹性接头的混凝土路面的应力和挠度。这种分析方法最初是由Skarlatos在1949年在H.M.韦斯特加德（Westergaard）一直默默无闻。该方法最近由Hammons和Ioannides于1996年在美国陆军工程师研究与发展中心（ERDC）的一份报告中进行了讨论，该报告讨论了承受波音777起落架作用的混凝土板的荷载传递效率。通过数值积分技术提出并求解了在点荷载作用下的应力和挠度的通用方程。该解决方案技术能够在任何齿轮或负载配置下计算加载和相邻板中任何位置的应力和挠度。该数值解决方案已实施到计算机程序中，并用于分析在关节上移动的波音777起落架。将计算得出的接头两侧的挠度与实际的现场测量结果进行比较，并与Hammons和Ioannides（1996）进行的有限元预测相比较。这种更简单的分析程序所产生的结果与测量数据相比，与更复杂的有限元程序的结果一样好。这种更简单的解决方案技术对工程师设计和分析节理的混凝土路面具有重要的价值。该分析工具将得到扩展，以后推荐用作军事混凝土路面设计和评估的基础。

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