Experimental and numerical investigation on the non-uniform temperature distribution of steel beams with corrugated web under solar radiation

Investigation of Temperature Variations and Extreme Temperature Differences for the Corrugated Web Steel Beams under Solar Radiation

“…where ε is the emissivity of the steel surface and C B stands for the Stefan-Boltzmann constant. The steel's thermal properties applied in this paper are as follows [6]: thermal conductivity = 56 W/mK, density = 7850 kg/m 3 , and specific heat = 480 J/kgK. Besides, the steel surface's absorptivity, emissivity, and ground reflectance values were set as 0.6, 0.8, and 0.2, respectively.…”

“…The FE model is meshed by the physics-controlled mesh in COMSOL which includes nine different precision grades from extremely coarse to extremely fine. The finer mesh size is adopted in the FE model and it is proved to have sufficient accuracy for the thermal analysis of steel beams according to previous researches [6,15]. The FE model contains a total of 56,952 tetrahedra elements and 38,014 triangular elements.…”

“…Nowadays, corrugated web steel beams are widely applied in engineering structures due to their lightweight and superior carrying capacity [4,5]. The corrugated web steel beam's temperature field can be more complicated and non-uniform on account of its complicated geometric construction [6]. Therefore, investigations of the non-uniform temperature field are of critical importance for improving their engineering application and ensuring the structural safety of corrugated web steel beams.…”

Experimental and numerical investigation on the temperature distribution of composite box‐girders with corrugated steel webs

“…The incoming heat flux from total solar radiation on the structure surfaces can be determined by where α is the absorption coefficient and I s is the total solar radiation intensity on the structure's surfaces. The Hottel clear sky model is widely applied in the thermal analysis of bridges and the model is also adopted in the current study to estimate the total radiation intensity, as displayed in follows 10,28,34 : where I b and I d are the direct and diffuse radiation on a horizontal plane, respectively; R b , R d , and R e are the correction factors; and e is the reflection coefficient (0.2 is applied in the current study 15,28 ). The direct radiation I b and the diffuse radiation I d in Equation (7) can be acquired by the decomposition of the total radiation I T .…”

“…The nonuniform features and the temperature distribution characteristics of beam string structures were analyzed based on the experimental data. Huang et al 15 experimentally and numerically investigated the nonuniform temperature field in a corrugated steel beam under solar radiation. Meanwhile, the differences of steel beam's temperature distributions in respect of flat web and corrugated web were investigated numerically.…”