Design and Performance of Elastic Fastening （设计和弹性连接的性能）.pdfVIP

Design and Performance of Elastic Fastening System Assemblies and Concrete Sleepers for Heavy-Haul Service 1 1 1 1 2 3 M. Dersch , M. Gutierrez Romero , J.R. Edwards , C. Barkan , B. Wilson , J. Mediavilla 1 Rail Transportation Engineering Center, University of Illinois at Urbana-Champaign, Urbana IL, USA; 2 Amsted Rail Company, Inc, Granite City, IL, USA; 3 Unit Rail Division of Amsted Rail Company, Inc. Overland Park, KS, USA Abstract As heavy-haul freight axle loads and cumulative tonnages increase and high-speed passenger rail systems develop, improved concrete sleeper and fastening system performance is becoming increasingly important. In addition to the increased service demands, poor performance of the fastening system is often correlated to the occurrence of rail seat deterioration (RSD), one of the primary maintenance concerns with concrete sleepers on North American heavy-haul railroads. Reducing the life cycle costs of concrete sleeper fastening systems is of paramount importance to the railway industry to ensure the continued acceptance of concrete ties as a viable means of rail restraint. Recent advancements in fastening system design for concrete sleepers in heavy-haul and passenger service stem from research and testing addressing current problems the industry is facing regarding the use of concrete sleepers and fastening systems. This paper includes a brief review of fastening system characteristics and performance. This paper also presents results from full-scale crosstie and fastening system component tests at UIUC. Testing