SEISMIC RESPONSE OF SACRIFICIAL SHEAR KEYS IN BRIDGE ABUTMENTS.

16. Abstract Sacrificial shear keys are used at abutments to provide transverse support for bridge superstructures under seismic loads. In addition, sacrificial shear keys serve as structural fuses to control damage in abutments and the supporting piles under transverse seismic loads. Sacrificial shear keys may be interior or exterior. Exterior shear keys are usually recommended for new construction because they are easier to inspect and repair. One of the important issues addressed in this report is the post-earthquake inspection and repair of abutments with shear keys.

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