TY - JOUR
T1 - Dynamic response of high-speed rail foundations using linear hysteretic damping and frequency domain substructuring
AU - Wang, Judith
AU - Zeng, Xiangwu
AU - Gasparini, D. A.
PY - 2008/4
Y1 - 2008/4
N2 - A proposed method for mitigating ground-borne vibration generated by high-speed trains is the usage of rubber-modified asphalt concrete as a ballast mat material. To gauge this material's influence in vibration control, a dynamic finite element code that models distinct damping properties in a large, nonhomogenous system was created. A linear hysteretic damping model is used to capture the dissipative mechanisms of each material; frequency domain substructuring is used for computational efficiency. Vibratory responses utilizing different ballast mat materials in a high-speed rail foundation are compared. It is shown that rubber-modified asphalt concrete results in a general reduction of motion, particularly in directions horizontally parallel and perpendicular to the train's passage. The described modeling procedure may be used for any dynamic analysis where the preservation of material damping characteristics is desired.
AB - A proposed method for mitigating ground-borne vibration generated by high-speed trains is the usage of rubber-modified asphalt concrete as a ballast mat material. To gauge this material's influence in vibration control, a dynamic finite element code that models distinct damping properties in a large, nonhomogenous system was created. A linear hysteretic damping model is used to capture the dissipative mechanisms of each material; frequency domain substructuring is used for computational efficiency. Vibratory responses utilizing different ballast mat materials in a high-speed rail foundation are compared. It is shown that rubber-modified asphalt concrete results in a general reduction of motion, particularly in directions horizontally parallel and perpendicular to the train's passage. The described modeling procedure may be used for any dynamic analysis where the preservation of material damping characteristics is desired.
KW - Damping
KW - Finite elements
KW - Frequency domain substructuring
KW - Ground-borne vibration
KW - High-speed trains
KW - Linear hysteretic damping
KW - Rubber-modified asphalt concrete
KW - Vibration isolation
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U2 - 10.1016/j.soildyn.2007.06.004
DO - 10.1016/j.soildyn.2007.06.004
M3 - Article
AN - SCOPUS:38149022555
SN - 0267-7261
VL - 28
SP - 258
EP - 276
JO - Soil Dynamics and Earthquake Engineering
JF - Soil Dynamics and Earthquake Engineering
IS - 4
ER -