MAE Center research Success with DOTs Slide 18 Seismic - Seismic - Design - Bridge - Structures - Federal Highway Administration

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Washington, DC 20590
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Bridges & Structures

Seismic

MAE CENTER RESEARCH SUCCESS WITH DOTs

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Elastomeric Bearings

These graphs show the components of movement due to seismic inertial forces of the superstructure at Abutment 1, Pier 2, and Pier 3 due to movement across the slider, movement across the elastomeric bearing, and movement due to bending of the pier columns.

There are four different bearing configurations considered. Bearing types I and II are shown on slide 16. What is called "Pier 3 Retrofit" is a slider which is not shown. The line "Lap Splice Damage Threshold" indicates the level at which column behavior becomes inelastic and provisions to improve the ductility of the column must be considered.

Peak Relative Displacement (mm)
BearingLocationPierSliderElastomerTotal
FixedAbut 1---0
FixedPier 290--90
FixedPier 3155--155
 
Type IIAbut 1-20040320
Type IPier 2195-209404
RetrofittedPier 345363-408
 
Type IIAbut 1-22088258
Type IPier 285-173258
FixedPier 3256--258
 
Type IAbut 1-32232360
Type IPier 2175-210385
Type IPier 3200-180380

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Updated: 06/13/2013
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000