Temperature Effects on Rail Anchor Slip Force – Year 2

Details

• Creators:
  Rahmaninezhad, S. Mustapha ; Tarawneh, Constantine ; Vera, David ; Fuentes, Arturo ; Encinia, Jorge
• Corporate Creators:
  University of Texas Rio Grande Valley. University Transportation Center for Railway Safety
• Corporate Contributors:
  United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
• Subject/TRT Terms:
  Cold Weather Failure Ground Anchors Longitudinal Strength Railroad Rails Railroad Tracks Repeated Loads Slip Resistance Temperature Thermal Analysis
• Publication/ Report Number:
  UTCRS-UTRGV-I6CY24
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  June 1, 2024 – August 31, 2025
• Corporate Publisher:
  University of Texas Rio Grande Valley. University Transportation Center for Railway Safety
• Abstract:
  Rail anchors are integral to the rail industry due to their effectiveness in improving track stability, enhancing track resistance to longitudinal movement, and preventing thermal-related track failures. The resistance to longitudinal movement allows for maintaining Rail Neutral Temperature (RNT). Temperatures outside the RNT range can lead to derailments and other catastrophic failures. Despite the positive impact rail anchors have in the rail industry, research on the interaction between rail and anchors remains minimal. In this study, utilizing a modified Track Panel Pull Test (TPPT) setup, the interaction of rail and anchor is analyzed with varying temperatures under cyclic loading. Temperatures range from below freezing to extremely hot temperatures, with a range from -10°C (14°F) to 78°C (172°F). Furthermore, displacement-controlled testing procedures were utilized to obtain consistent slip forces, or longitudinal resistances, for specified displacements of the anchors. Temperature affects longitudinal resistance differently for different anchor types. Specifically, resistance consistently increases as temperature increases, but the magnitude of this effect varies by anchor design. From hot to cold temperatures, there was a 38%, 34%, and 32% drop in longitudinal resistance for Anchors X, Y, and Z, respectively.
• Format:
  PDF
• Funding:
  69A3552348340
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:58ae4db04ebef84317ba3a9210a56b64a78d0072a83a89369ed18d09d9eb9cf353024b40cbcf35757bcac3a123b50d3b309093dcc0b9682d8e5a9524457074f5
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/88808/dot_88808_DS1.pdf
• File Type:
  [PDF - 2.96 MB ]