Research Article
Progressive Collapse of RC Box Girder Bridges due to Seismic Actions
Table 3
Properties of the bridge materials.
| | Parameter | Concrete | Steel reinforcement and plates | Bearing interface | Unit |
| | Compressive strength | 4e06 | 3.6e07 | 5.51e + 07 | kg/m2 | | Tensile strength | 4e05 | 3.6e07 | — | kg/m2 | | Young’s modulus | 2.213e09 | 2.0389e + 09 | 2.0389e + 09 | kg/m2 | | Shear modulus | 984297e03 | 8.1556e + 09 | 203943 | kg/m2 | | Specific weight | 2500 | 7840 | 7840 | kg/m3 | | Separation strain | 0.2 | 0.12 | 1 | — | | Friction coefficient | 0.8 | 0.8 | 0.6 | — | | Ultimate strength/tensile stress | — | 1.4444 | — | — | | Normal contact stiffness factor | 0.0001 | 0.0001 | 0.0001 | — | | Shear contact stiffness factor | 1.00e − 05 | 1.00e − 05 | 1.00e − 05 | — | | Contact spring unloading stiffness factor | 2 | 2 | 2 | — | | Postyield stiffness ratio | — | 0.01 | — | — |
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