Time-Dependent Behavior of Concrete Box Girder Bridges

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Title: Time-Dependent Behavior of Concrete Box Girder Bridges

Author(s): Alex C. Scordelis, Lennart G. Elfgren, and Per K. Larsen

Publication: Journal Proceedings

Volume: 76

Issue: 1

Appears on pages(s): 159-178

Keywords: box beams; continuous beams; creep properties; cyclic loads; girder bridges; models;reinforced concrete; strains; static loads.

Date: 1/1/1979

Abstract:
Time-dependent deflections and strain histories under sustained dead load, after successively increasing overload conditions, are presented for two 1:2.82 scale reinforced concrete models of a typical two-lane prototype bridge in California having two 101.5 ft (30.9 m) spans with a single column bent at the center. The two models had the same four cell cross section but one was straight in plan, while the other was curved. The experimental data for the two bridge models are presented and compared with each other as well as with theoretical predictions. Time-dependent responses of the two bridges were quite similar. Maximum dead load deflection after 4 months and the application and removal of heavy overloads was about 4 times the initial deflection.