...
首页> 外文期刊>Frontiers in Materials >Introducing a New Limit States Design Concept to Railway Concrete Sleepers: An Australian Experience
【24h】

Introducing a New Limit States Design Concept to Railway Concrete Sleepers: An Australian Experience

机译:向铁路混凝土轨枕引入新的极限状态设计概念:澳大利亚的经验

获取原文

摘要

Over 50 years, a large number of research and development projects with respect to the use of cementitious and concrete materials for manufacturing railway sleepers have been significantly progressed in Australia, Europe, and Japan (Wang, 1996; Murray and Cai, 1998; Wakui and Okuda, 1999; Esveld, 2001; Freudenstein and Haban, 2006; Remennikov and Kaewunruen, 2008). Traditional sleeper materials are timber, steel, and concrete. Cost-efficiency, superior durability, and improved track stability are the main factors toward significant adoption of concrete materials for railway sleepers. The sleepers in a track system, as shown in Figure 1, are subjected to harsh and aggressive external forces and natural environments across a distance. Many systemic problems and technical issues associated with concrete sleepers have been tackled over decades. These include pre-mature failures of sleepers, concrete cancer or ettringite, abrasion of railseats and soffits, impact damages by rail machinery, bond-slip damage, longitudinal and lateral instability of track system, dimensional instability of sleepers, nuisance noise and vibration, and so on (Pfeil, 1997; Gustavson, 2002; Kaewunruen and Remennikov, 2008a,b, 2013). These issues are, however, becoming an emerging risk for many countries (in North and South Americas, Asia, and the Middle East) that have recently installed large volumes of concrete sleepers in their railway networks (Federal Railroad Administration, 2013). As a result, it is vital to researchers and practitioners to critically review and learn from previous experience and lessons around the world.
机译:50多年来,澳大利亚,欧洲和日本在使用水泥和混凝土材料制造铁路轨枕方面进行了大量研究和开发项目(Wang,1996; Murray和Cai,1998; Wakui和奥田(1999);埃斯维尔德(Esveld),2001;弗洛伊登斯坦(Freudenstein)和哈本(Haban),2006;雷门尼科夫(Remennikov)和凯文鲁恩(Kaewunruen),2008)。传统的枕木材料是木材,钢材和混凝土。成本效益,出色的耐久性和改善的轨道稳定性是铁路枕木大量采用混凝土材料的主要因素。如图1所示,轨道系统中的轨枕要承受一定距离的苛刻和侵略性外力以及自然环境。与混凝土轨枕有关的许多系统性问题和技术问题已经解决了数十年。其中包括轨枕过早失效,混凝土癌或钙矾石,铁路座椅和拱腹的磨损,铁路机械的冲击损伤,结合滑移损伤,轨道系统的纵向和横向不稳定性,轨枕的尺寸不稳定性,有害的噪音和振动以及等等(Pfeil,1997; Gustavson,2002; Kaewunruen和Remennikov,2008a,b,2013)。然而,对于许多最近在其铁路网络中安装了大量混凝土轨枕的国家(北美和南美,亚洲和中东),这些问题正成为新兴风险(联邦铁路管理局,2013)。因此,至关重要的是,研究人员和从业人员必须认真审查并从世界各地的以往经验教训中学习。

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