Abstract
The paper reports the construction and surcharge load testing of two large-scale GRS bridge abutment models in an outdoor test station to investigate the influences that the facing type used could have on their load-bearing performance. The facing types examined included commonly used concrete masonry units (CMU) and much larger solid concrete blocks. Reinforcement spacing was kept at 200 mm in both models within the FHWA recommendations. Results show that using large facing blocks in the model abutment led to significant improvements in its load–deformation performance relative to that of the model with the CMU facing alternative. It is concluded that even though the structural contribution of facing is not relied upon in the FHWA guidelines, large-block facing construction could help improve the structural performance of GRS abutments in GRS-IBS projects.
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Acknowledgements
Funding for this project was provided by the Oklahoma Department of Transportation (ODOT) through SP&R Item No. 2262-Phase II. The GSI Fellowship granted to the first author by the Geosynthetic Institute in Folsom, PA, is gratefully acknowledged. Donations of the fill aggregate by Dolese Bros., Inc. in Oklahoma City, OK, and the geotextile reinforcement material by TenCate Geosynthetics, in Cornelia, GA, are gratefully acknowledged. The authors also wish to acknowledge the invaluable assistance from Mike Schmitz, the Fears Structural Laboratory Manager at the University of Oklahoma, and those of graduate students, Jerome Boutin, Kirby Falcon and Matsuura Kazunori, and undergraduate research assistants Stephen Schnabel, Coleman Ross, Uzeir Hodzic, John King, Daniel Farley, Vuth Chea, and Jackie Pham during the construction and testing of the GRS abutment models described in this study.
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Doger, R., Hatami, K. Influence of Facing on the Performance of GRS Bridge Abutments. Int. J. of Geosynth. and Ground Eng. 6, 42 (2020). https://doi.org/10.1007/s40891-020-00225-y
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DOI: https://doi.org/10.1007/s40891-020-00225-y