Tran-SET 2021
Estimation of Seismic Site Factors for Selected Locations in Northeast Arkansas
Publication: Tran-SET 2021
ABSTRACT
Northeast Arkansas (NEA) lies within the Mississippi Embayment (ME), and it has a deep deposition of soil (ranging from 200m~1000m) overlying the bedrock. The code based design approaches such as the American Association of State Highway and Transportation Officials (AASHTO) do not consider the impact of deep deposition of soil while designing structures like bridges. As a result, short period spectral accelerations are overestimated at significant cost and long period spectral accelerations are underestimated at significant risk. The purpose of this study is to bring out importance of performing site specific ground motion response analysis (SSGMRA) over code-based design procedures and predict seismic site factors for the NEA region by ground response analyses. After the analyses, it has been found that short period spectral accelerations get deamplified and long-period spectral accelerations get amplified compared to that of the AASHTO method. This study strengthens the demand for performing SSGMRA over code-based approaches in the case of deep deposition of soil.
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ACKNOWLEDGMENTS
The authors gratefully acknowledge the funding support, which was provided by the United States Department of Transportation (USDOT) through the Transportation Consortium of the South- Central States (TranSET). The authors are also thankful to the Arkansas Department of Transportation (ARDOT), and suppliers of the materials for their technical support throughout this study.
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Information & Authors
Information
Published In
Tran-SET 2021
Pages: 232 - 246
Editors: Zahid Hossain, Ph.D., Arkansas State University, Marwa Hassan, Ph.D., Louisiana State University, and Louay Mohammad, Ph.D., Louisiana State University
ISBN (Online): 978-0-7844-8378-7
Copyright
© 2021 American Society of Civil Engineers.
History
Published online: Nov 17, 2021
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