SEISMIC ANALYSIS AND DESIGN OF BRIDGE ABUTMENTS CONSIDERING SLIDING AND ROTATION

[mahyarov]

SEISMIC ANALYSIS AND DESIGN OF BRIDGE ABUTMENTS CONSIDERING SLIDING AND ROTATION

Author: Fishman, K Richards, R | Size: 3.69 MB | Format: PDF | Quality: Original preprint | Publisher: National Center for Earthquake Engineering Research | Year: 1997 | pages: 88

In this report, the authors update and extend the coupled equations of motions that appear in the literature. A newly developed fundamental theory on seismic bearing capacity of soils was ued to compute the seismic resistance of bridge abutments and the resisting moment offered by the foundation soil. Also, the equations presented have been extended to consider the case of bridge abutments and load transfer from the bridge decks. Algorithms for predicting permanent deformations were applied to a number of test cases that were modeled in the laboratory. Model bridge abutments were constructed within a seismic testing chamber, and seismic loading was applied to the models via a shaking table. Compared to previous studies described in the literature, the models were unique in the sense that they were not constrained to a particular mode of failure. Failure was possible by sliding, tilting or a combination of both. The mode of failure could be accurately predicted and depended on model parameters and properties of the backfill and foundation soil.

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