Dynamic Soil-Foundation Interaction at the Meloland Road Overcrossingby C. B. Crouse,
Abstract: Forced vibration tests, using a hydraulic ram device, were conducted on the Meloland Road Overcrossing (MRO) bridge over Interstate 8 near El Centro, California. Dynamic response data from these tests were used to estimate the stiffnesses of the abutment and central pier foundations of this two-span, reinforced concrete, box girder bridge of monolithic construction. These foundation stiffnesses were computed by solving approximate equations of motion for the fundamental transverse mode of vibration of the MRO excited by the quick release of the hydraulic ram loads. The foundation stiffnesses estimated by this simple method were similar to those computed by Douglas et al. (1991) who used a formal parameter identification methodology applied to the test data.
Subject Headings: Soil-structure interaction | Bridge tests | Bridge foundations | Bridge abutments | Highways and roads | Equations of motion | Stiffening | Highway bridges | North America | California | United States
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