Soil Investigation and Soil-Structure Interaction Modeling of the Kealakaha Bridge

FHWA is currently funding the seismic instrumentation of the Kealakaha Stream Bridge through a Hawaii Department of Transportation grant to University of Hawaii. This project includes purchase, placement and monitoring of various instrumentation systems on this new long-span post-tensioned box-girder bridge to be constructed starting in 2003. The Kealakaha Bridge will be the first major structure on the Island of Hawaii to be equipped with an extensive instrumentation system for monitoring response to future seismic events. The instrumentation will also be used to monitor structural response to ambient traffic, thermal effects, and long-term effects of creep and shrinkage. The seismic response of the bridge structure will be recorded during any earthquake event exceeding a predetermined ground acceleration threshold. This response will be compared with that obtained from finite element computer models of the structure. During ambient traffic conditions and for low intensity seismic events, the bridge structure and foundation system are expected to respond elastically. SAP2000 and ANSYS 3-D models have already been developed to predict the elastic response of the structure and foundation. During moderate to high intensity seismic events, both soil and structural systems are expected to respond in the nonlinear range. In order to effectively model this response, it is proposed that a cutting edge software code, OpenSees, currently under development by researchers at the Pacific Earthquake Engineering Research Center (PEER), be used to model the bridge and surrounding soil. In order to provide the necessary hysteretic material properties for this non-linear analysis, additional soil material properties are required. The original geotechnical investigation performed prior to the bridge design collected only limited static material properties. No data are available regarding the dynamic soil properties or the large deformation nonlinear response of the soil. The first year of this proposal includes a detailed soils investigation involving both in-situ and laboratory tests of dynamic and nonlinear soil properties. The second year of the program will use OpenSees or other suitable software codes to develop a three-dimensional nonlinear model of the soil-structure system for use in future evaluation of seismic response.


    • English


    • Status: Active
    • Contract Numbers:



    • Sponsor Organizations:

      Federal Highway Administration

      300 Ala Moana Boulevard
      Honolulu, HI  USA  96850

      Hawaii Department of Transportation

      2530 Likelike Highway
      Honolulu, HI  USA  96817
    • Project Managers:

      Santo, Paul

    • Performing Organizations:

      University of Hawaii, Manoa

      College of Engineering, Department of Civil and Environmental Engineering
      2540 Dole Street, Holmes Hall 383
      Honolulu, HI  USA  96822
    • Principal Investigators:

      Robertson, Ian

    • Start Date: 20040217
    • Actual Completion Date: 20070216
    • Source Data: RiP Project 12792

    Subject/Index Terms

    Filing Info

    • Accession Number: 01460460
    • Record Type: Research project
    • Source Agency: Hawaii Department of Transportation
    • Contract Numbers: 51068, HWY-L-2003-02
    • Files: RiP, USDOT, STATEDOT
    • Created Date: Jan 3 2013 1:25PM