Site-Specific Seismic Ground Motion Analyses for North-East Arkansas

The New Madrid Fault Zone (NMFZ) passes through the middle of northeast Arkansas (NEA), which is located in the western part of the upper Mississippi Embayment (ME) area. With the history of major earthquakes and the merge of ME and NMFZ in the region, the understanding of the nature of ground responses and prospects of liquefaction hazards in NEAR has been a complex problem. According to the American Association of State Highway Officials (AASHTO), the Arkansas Geological Survey (AGS), and the Federal Emergency Management Agency (FEA), the NEA area is under Site Class F and most of the area has liquefaction susceptibility ranging from high to very high. Furthermore, this area has a history of sand boiling. Thus, the Site Specific Ground Response Analysis (SSGRA) and Cyclic Liquefaction Analysis (CFA) are the basic requirements for the Arkansas Department of Transportation (ARDOT) and other agencies before building any structures in the area. As part of a recent ARDOT’s Transportation Research Committee (TRC) project, researchers have conducted geophysical investigations several construction sites in NEA over the past twelve years. The current study gathered the previously reported test data and estimated seismic site coefficients for five locations near the city of Jonesboro and cyclic liquefaction analysis for 131 sites in northeast Arkansas. The analysis results will guide the bridge design engineers to estimate suitable site factors for designing bridges near Jonesboro, AR. The developed liquefaction risk maps will also help the engineers (bridge, utility, and foundation) in estimating liquefaction potentials and associated risks in northeast Arkansas.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Maps; Photos; References; Tables;
  • Pagination: 126p

Subject/Index Terms

Filing Info

  • Accession Number: 01765912
  • Record Type: Publication
  • Report/Paper Numbers: 19GTASU01
  • Contract Numbers: 69A3551747106
  • Files: UTC, TRIS, ATRI, USDOT
  • Created Date: Feb 12 2021 10:44AM