United States Department of Transportation
i
Long-Term Structural Modeling of the North Halawa Valley Viaduct
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1999-07-01
[PDF-3.99 MB]
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Edition:Research Report
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Abstract:The H-3 Freeway is the newest portion of Hawai'i's freeway system, linking the leeward and windward sides of Oahu. One of the largest sections of the H-3 freeway is the North Halawa Valley Viaduct (NHVV), designed by Nakamura and Tyau Associates of Honolulu, Hawaii and T.Y. Lin International of San Francisco. The twin viaducts which make up the NHVV are segmental cast-in-place concrete box girder structures built by the cantilever construction method. An extensive instrumentation program was initiated by the University of Hawai'i (UH) and T.Y. Lin International personnel during construction of unit 2 of the inbound viaduct in 1994. Four of the spans in this unit were instrumented for long-term monitoring. The focus of this study is the long-term performance of the NHVV after four years of monitoring. Topics covered include: concrete material properties including creep and shrinkage; computer modeling using SFRAME, a structural analysis program; SFRAME results compared with site measurements; and development of deflection envelope.
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