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Seismic Design Considerations : Volume I, Technical Approaches and Results; Volume II, Appendices II-VIII
  • Published Date:
    2012-03-01
  • Language:
    English
Filetype[PDF-40.96 MB]


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Seismic Design Considerations : Volume I, Technical Approaches and Results; Volume II, Appendices II-VIII
Details:
  • Corporate Creators:
    University Transportation Research Center ; City University of New York. Institute for Transportation Systems ;
  • Report Number:
    FHWA-NJ-2010-006
  • Resource Type:
  • Geographical Coverage:
    New Jersey
  • Edition:
    Final report, Jan. 2008-Mar. 2012.
  • Corporate Publisher:
    New Jersey. Dept. of Transportation
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-ENERGY AND ENVIRONMENT-Environment Impacts ; NTL-REFERENCES AND DIRECTORIES-REFERENCES AND DIRECTORIESNTL-SAFETY AND SECURITY-SAFETY AND SECURITY ; NTL-PLANNING AND POLICY-PLANNING AND POLICY ;
  • Format:
    PDF
  • Description:
    NJDOT has adopted “AASHTO Guide Specifications for LRFD Seismic Bridge Design” approved by the Highway

    Subcommittee on Bridges and Structures in 2007. The main objective of research presented in this report has

    been to resolve following issues for an effective implementation of AASHTO Guide Specifications: (i) AASHTO

    Guide Specifications don’t provide any specific guidelines for classification and performance requirements for

    critical bridges. This issue is resolved by proposing performance requirements and classification criteria for

    critical bridges in New Jersey. (ii) Guide Specifications present displacement based approach, which is

    significantly different than the force-based approach in previous versions of seismic guidelines. Nine examples

    of reinforce concrete and steel bridges of different characteristics (spans, skew, etc.) illustrating the use of newly

    adopted seismic guide specifications have been developed for training of engineers in New Jersey. (iii) NJDOT

    maintains an extensive electronic database of soil boring logs for the State of New Jersey. A zip-code based soil

    site map for New Jersey has been developed by analyzing soil boring data and other available New Jersey soil

    information. This map can be used for a rapid seismic hazard evaluation for the entire state or for a network of

    bridges in the state. (iv) AASHTO Guide Specifications introduce seismic design categories based on local

    seismicity and soil properties. Using the seismic soil map and zip code based seismic spectra provided in the

    AAHSTO Guide Specifications, seismic design category maps for critical and standard bridges in New Jersey

    have been developed. A detailed analysis has also been carried out to develop liquefaction potential maps for

    the state of New Jersey. These maps can be used to determine the need for a detailed liquefaction analysis for

    a particular bridge site. A detailed guideline on developing site-specific spectra has also been developed, since

    AASHTO Guide Specifications recommend site-specific spectra for critical bridges. (v) Existing bridges in New

    Jersey are required to be retrofitted on the basis of 2006 Edition of the “Seismic Retrofitting Manual for Highway

    Structures: Part 1 – Bridges”. Simplified guidelines for seismic retrofit of existing bridges, that are consistent

    with guidelines for the design of new bridges in AASHTO Guide Specifications, have been developed.

  • Funding:
    75144-01-20
  • Supporting Files:
    No Additional Files
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