Research Article
Layout Optimization of Rail Expansion Joint on Long-Span Cable-Stayed Bridge for High-Speed Railway
| Structure | Items | Units | Simply supported beam | Steel box beam |
| Beam | Modulus of elasticity | N/m2 | 3.6 × 1010 | 2.1 × 1011 | Poisson ratio | — | 0.2 | 0.3 | Coefficient of thermal expansion | /°C | 1.0 × 10−5 | 1.2 × 10−5 | Density | kg/m3 | 2625 | 7875 |
| Main tower | Modulus of elasticity | N/m2 | 3.6 × 1010 | Poisson ratio | — | 0.2 | Coefficient of thermal expansion | /°C | 1 × 10−5 | Density | kg/m3 | 2625 |
| Stay cable | Elastic modulus of stay cable material | N/m2 | 1.98 × 1011 | Cross-sectional area | m2 | 1.16 × 10−2 | Poisson ratio | — | 0.3 | Coefficient of thermal expansion | /°C | 1.2 × 10−5 |
| Rail CHN60 | Modulus of elasticity | Pa | 2.06 × 1011 | Cross-sectional area | m2 | 7.745 × 10−3 | Poisson ratio | — | 0.3 | Coefficient of thermal expansion | /°C | 1.18 × 10−5 | Density | kg/m3 | 7850 |
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