Seismic vulnerability of existing bridge substructures supporting the I-55 undercrossing at MS-302 (Goodman Road).

Final report.PDFTech ReportSP-9999-00(27) 101411/011000 [79-999-00-027-11 PE]Earthquake resistant designEarthquake engineeringEarthquake resistant structuresBridgesBridge substructuresMississippiMississippi. Dept. of TransportationMullen, Chris L.University of Mississippi. Dept. of Civil EngineeringMississippi. Dept. of TransportationNTL-ENERGY AND ENVIRONMENT-Environment ImpactsNTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and StructuresUS Transportation CollectionAs part of a work assignment issued by the Mississippi Department of Transportation,Bridge Division, the following report has been prepared to document results of aninvestigation of seismic vulnerability of the primary structural elements supporting thedeck of the existing I-55 Undercrossing at MS-302 (Goodman Road). In order to assessthe complex nature of the response to seismic excitation, a multi-level analysis has beenperformed, including: 1) a two-dimensional pushover analysis of a typical bent, 2) aneigenvalue and linear response spectrum analysis of a three-dimensional, fixed-base,finite element model of the four-span, concrete structural system, and 3) a threedimensional,nonlinear, time history analysis of the soil-structure system including theembankments and the soil column to a depth of about 100 ft below the deck level