Research of Thermal Effect of Cable-Stayed Bridge with a Separated Side-Box Steel-Concrete Composite Girder under Solar Radiation

Table 1

Material mechanics parameters.

Parameters	Steel	Asphalt	Concrete	Air	HDPE	Steel wire of stay cable
Elastic modulus (MPa)	206000	—	36000	—	—	205000
Poisson ration	0.3	—	0.2	—	—	0.3
Density (kg/m^3)	7850	2400	2600	—	—	7850
Thermal expansion coefficient (1/°C)	1.2e − 05	—	1.0e-05	—	—	—
Solar radiation absorptivity	0.75	0.9	0.65	—	0.63	—
Solar radiation emissivity	0.8	0.92	0.88	—	0.93	—
Thermal conductivity W/(m·°C)	60	1.8	2.71	0.026	0.42	1.2
Specific heart capacity (J/kg/°C)	460	1075	960	1.007	2250	508

Note: Poisson ratio, solar radiation absorptivity, and solar radiation emissivity are dimensionless parameters. The material properties in the table are derived from [23, 24].