Design, analysis, and seismic performance of a hypothetical seismically isolated bridge on legacy highway.

Details

• Creators:
  Ryan, Keri L. ; Richins, Brian
• Corporate Creators:
  Utah State University. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Utah. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridges
  • Earthquake engineering
  • Earthquake resistant design
  • Earthquake resistant structures
  • Bridges--Earthquake effects--Utah
  • Earthquake resistant design--Utah
  • Earthquake engineering--Utah--Design and construction
• Publication/ Report Number:
  UT-11-01
• Resource Type:
  Tech Report
• Geographical Coverage:
  Utah
• Edition:
  Final report; 11/2007 - 01/2011.
• Corporate Publisher:
  Utah. Dept. of Transportation. Research Division
• Abstract:
  The need to maintain the functionality of critical transportation lifelines after a large seismic event motivates the ; strategy to design certain bridges for performance standards beyond the minimum required by bridge design codes. ; To design a bridge to remain operational, one may stiffen and strengthen the load carrying members to increase the ; capacity, or alternatively use response modification devices such as seismic isolators to shift the dynamic ; characteristics of the bridge, henceforth reducing the seismic demands. Seismic isolation systems are attractive ; because they are directly conducive to accelerated bridge construction techniques. The two strategies are compared ; for a typical Utah highway bridge, using a three-span, pre-stressed concrete girder bridge that crosses Legacy ; Highway as a case study example. The existing Legacy Bridge, which was designed as a Standard bridge for a 2500- ; year return period earthquake, is evaluated as an Essential bridge for a 1000-year return period earthquake. ; Subsequently, this bridge is redesigned and evaluated as a seismically isolated bridge. Configuration changes needed ; to accommodate a seismic isolation system are discussed, and reductions to column and foundation elements are ; proposed. Example seismic isolator designs are provided for several different types of isolation systems commonly ; used in the United States. Inspection and maintenance practices for seismically isolated bridges are discussed.
  More +
• Format:
  PDF
• Funding:
  08-9182
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23890/dot_23890_DS1.pdf
• File Type:
  [PDF - 3.52 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9e654e33ca46cce989d5bd35bfc3611a42edc6c511ee1a3ff77521758a9dfdf856b0ee2943f7bbf5ed34f322af83ad1f03c1e3af661574fc0d7f61d946234a1d