Research Article
Fragility-Based Improvement of System Seismic Performance for Long-Span Suspension Bridges
Table 1
Uncertainty parameters incorporated in the modeling design.
| Modeling parameter | Probability distribution | Mean | COV | Unit | Source |
| Concrete compressive strength | C55 | Normal | 46.6 | 0.149 | MPa | [20] | C35 | 32.1 | 0.164 | Steel yield strength | HRB500 | Lognormal | 569.6 | 0.0743 | MPa | HRB400 | 455.7 | HRB335 | 381.6 | Friction coefficient | Sliding pot bearing | Uniform | 0.03 | 0.33 | — | [14] | Fixed pot bearing | Lognormal | 0.2 | 0.002 | — | [7] | Abutment | Passive stiffness | Uniform | 20.15 | 0.25 | kN/mm/m | [7] | Active stiffness | Uniform | 14.0 | 0.29 | kN/mm/pile | [9] | Gap | Deck-deck | Normal | 760 | 0.2 | mm | [7] | Deck-abutment | 80 | | Deck-shear key | Uniform | 120 | 0.29 | mm | [16] | Damping ratio | Uniform | 1 | 0.1 | — | [7] | Deck mass | Normal | 0.02 | 0.15 | — | [28] |
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COV: coefficient of variation.
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