Full Scale Bridge Abutment Passive Earth Pressure Tests and Calibrated Models

Abstract eng:
Passive earth resistance at the abutments may limit earthquake induced bridge deck displacements. Including this abutment contribution in seismic bridge design may reduce the demand on the bridge piers and foundation. In consideration of such bridge abutment force-displacement resistance, static and shake table full scale abutment passive earth pressure tests are presented and discussed. Experimental and numerical results are used to calibrate hyperbolic force-displacement backbone curves to represent the abutments in bridge analyses and simulations. Parameters for implementation of these relationships are presented to account for various possible design assumptions. A cyclic loading abutment spring model is described in order to employ the calibrated hyperbolic backbone curves in dynamic numerical bridge simulations.

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