Research Article

An Experimental Investigation of Unbonded Laminated Elastomeric Bearings and the Seismic Evaluations of Highway Bridges with Tested Bearing Components

Table 2

Testing matrix.

Test specimenBearing typeProtocolVertical stress (MPa)Loading rate (mm/s)Target ESS (%)Boundary condition

Y1-4/30-UBY1Cycle430400Unbonded
Y1-6/30-UBY1Cycle630400Unbonded
Y1-8/30-UBY1Cycle830400Unbonded
Y1-8/45-UBY1Cycle845400Unbonded
Y2-8/3-UBY2Cycle83400Unbonded
Y2-8/30-UBY2Cycle830400Unbonded
Y2-8/45-UBY2Cycle845400Unbonded
Y3-8/30-BBY3Cycle830250Bonded
Y3-8/45-BBY3Cycle845250Bonded

Note. Unbonded boundary condition indicates that bearings do not have thick end plates, which cannot be bonded to structure. Bonded boundary condition indicates that bearings can be bonded to structure.