Research Article
Study on the Seismic Performance of Different Combinations of Rubber Bearings for Continuous Beam Bridges
Table 2
Physical parameters of bearings.
| Bearings | NRB-1 | NRB-2 | LRB-1 | LRB-2 | HDRB-1 | HDRB-2 |
| Height of bearings (mm) | 96 | 112 | 154 | 234 | 137 | 187 | Total thickness of rubber layer (mm) | 67 | 82 | 76 | 125 | 70 | 110 | Vertical bearing force (kN) | 1258 | 2701 | 1417 | 3510 | 1360 | 3489 | Vertical stiffness, (kN/m) | 689183 | 1168633 | 806791 | 1382812 | 875000 | 1427000 | Preyield stiffness, (kN/m) | — | — | 7225 | 12810 | 4690 | 7510 | Postyield stiffness, (kN/m) | — | — | 1133 | 1930 | 1340 | 2150 | Equivalent stiffness, (kN/m) | 1700 | 2720 | 1700 | 2720 | 1700 | 2720 | Yield force, (kN) | 25 | — | 106 | 190 | 53 | 133 | Shear modulus, (MPa) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | Damping ratio, (%) | — | — | 19.1 | 16.7 | 12 | 12 | Limiting displacement (mm) | 90 | 150 | 227 | 376 | 210 | 330 |
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