Ballast Vibrations and Deformations due to Different Train Loading Scenarios Studied Using the Discrete Element Method
This paper focuses on the effects of different dynamic train loading patterns on the vibra -tion and permanent deformation accumulation trends of railroad ballast. As opposed to a continuous sinusoidalload pulse often applied in cyclic triaxial tests ,the actual dynamic train loading may have loading patterns of varying pulse shapes with rest periods. A validated ballast model, based on the Discrete Element Method and imaging based aggregate size/shape characterization ,was used to simulate both continuous sinusoidal and moving wheel loading patterns of different train loading speeds or frequencies with and without rest periods between loadpulses. The continuous sinusoidal loading resulted in larger ballast layer settlements in DEM simulations when compared to a more realistic moving wheel dynamic loading pattern that considered rest periods.
Yu QIAN Erol TUTUMLUER Hai HUANG
Department of Civil and Environmental Engineering , University of Illinois at Urbana-Champaign ( UIU Division of Business and Engineering , Pennsylvania State University ,Altoona, Pennsylvania, 16601,
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
613-619
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）