TY - JOUR
T1 - Acceleration Response of a Geosynthetic Reinforced Soil Bridge Abutment under Dynamic Loading
AU - Zheng, Yewei
AU - McCartney, John S.
AU - Fox, Patrick J.
AU - Shing, P. Benson
N1 - Funding Information:
Financial support for this study was provided by the California Department of Transportation (Caltrans) Project 65A0556 and Federal Highway Administration (FHWA) Pooled Fund Project 1892AEA, and is gratefully acknowledged. The first author appreciates funding from the GSI Fellowship provided by the Geosynthetic Institute. The authors thank Dr. Charles Sikorsky and Ms. Kathryn Griswell of the Caltrans for their support and assistance with the project. The authors also thank the staff and undergraduate research assistants at the UCSD Powell Structural Laboratories for their help with the experimental work. The geogrid materials used in this study were provided by Tensar International Corporation.
Publisher Copyright:
© 2018 American Society of Civil Engineers.
PY - 2018
Y1 - 2018
N2 - This paper presents results from dynamic testing of a half-scale geosynthetic reinforced soil (GRS) bridge abutment using a shaking table, with the goal of understanding the acceleration response of the backfill soil, bridge seat, and bridge beam under dynamic loading. The GRS bridge abutment model was constructed using modular facing blocks, well-graded angular sand backfill, and uniaxial geogrid reinforcement in both the longitudinal and transverse directions. A series of input motions was applied to the GRS bridge abutment system in the direction longitudinal to the bridge beam. The horizontal accelerations increase with elevation in the reinforced soil zone and retained soil zone. The average peak acceleration of the reinforced soil zone is slightly greater than the calculated value from the current design guidelines, indicating that the guidelines may not be sufficiently conservative. The acceleration response spectrum for the bridge beam indicates a slight attenuation compared with that of the bridge seat, likely due to the isolation effect of an elastomeric bearing pad between the bridge beam and bridge seat.
AB - This paper presents results from dynamic testing of a half-scale geosynthetic reinforced soil (GRS) bridge abutment using a shaking table, with the goal of understanding the acceleration response of the backfill soil, bridge seat, and bridge beam under dynamic loading. The GRS bridge abutment model was constructed using modular facing blocks, well-graded angular sand backfill, and uniaxial geogrid reinforcement in both the longitudinal and transverse directions. A series of input motions was applied to the GRS bridge abutment system in the direction longitudinal to the bridge beam. The horizontal accelerations increase with elevation in the reinforced soil zone and retained soil zone. The average peak acceleration of the reinforced soil zone is slightly greater than the calculated value from the current design guidelines, indicating that the guidelines may not be sufficiently conservative. The acceleration response spectrum for the bridge beam indicates a slight attenuation compared with that of the bridge seat, likely due to the isolation effect of an elastomeric bearing pad between the bridge beam and bridge seat.
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U2 - 10.1061/9780784481486.001
DO - 10.1061/9780784481486.001
M3 - Conference article
AN - SCOPUS:85048858183
VL - 2018-June
SP - 1
EP - 9
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
SN - 0895-0563
IS - GSP 293
T2 - 5th Geotechnical Earthquake Engineering and Soil Dynamics Conference: Slope Stability and Landslides, Laboratory Testing, and In Situ Testing, GEESDV 2018
Y2 - 10 June 2018 through 13 June 2018
ER -