Nonlinear analysis of the pressure field in industrial buildings with curved metallic roofs due to the wind effect by FEM

Abstract

In this paper, an evaluation of distribution of the air pressure is determined throughout the laterally closed industrial buildings with curved metallic roofs due to the wind effect by the finite element method (FEM). The non-linearity is due to Reynolds-averaged Navier-Stokes (RANS) equations that govern the turbulent flow. The Navier-Stokes equations are non-linear partial differential equations and this non-linearity makes most problems difficult to solve and is part of the cause of turbulence. The RANS equations are time-averaged equations of motion for fluid flow. They are primarily used while dealing with turbulent flows. Turbulence is a highly complex physical phenomenon that is pervasive in flow problems of scientific and engineering concern like this one. In order to solve the RANS equations a two-equation model is used: the standard k   model. The calculation has been carried out keeping in mind the following assumptions: turbulent flow, an exponential-like wind speed profile with a maximum velocity of 40 m/s at 10 m reference height, and different heights of the building ranging from 6 to 10 meters. Finally, the forces and moments are determined on the cover, as well as the distribution of pressures on the same one, comparing the numerical results obtained with the Spanish CTE DB SE-AE, Spanish NBE AE-88 and European standard rules, giving place to the conclusions that are exposed in the study.

Design of composite tank covers

“…Another interesting solution design, steel-concrete composite shell roofs (Comshell roofs), are formed by pouring concrete on a thin stiffened steel base shell (the permanent formwork with the tensile steel reinforcement). It is constructed by bolting together open-topped modular units consisting of a base plate with surrounding edge plates to form with thin stiffeners in both directions [3]. Concrete [4,5], steel [6,7] tank dome roofs are widely described in literature.…”