Análise comparativa dos esforços solicitantes em estruturas típicas de pavilhões pré-moldados

Abstract

The use of precast concrete as a construction system is one of the fastest-growing technologies in Brazilian civil engineering. One of its main applications is in industrial pavilions. This study aimed to calculate and analyze the demand forces of one of the main types of tied portal frame used in Brazil. For this purpose, three basic height dimensions and three basic maximum span dimensions were defined to investigate the behavior of forces in each segment of the structure. Loadings were determined based on the current Brazilian standards, NBR 6120 (2019) and NBR 6123 (1988), along with the assistance of VisualVentos software for determining wind pressure coefficients acting on the portal frames. The structure modeling and force calculations were performed using SAP2000 software, and the obtained values were compiled into Excel spreadsheets and presented in graphs to facilitate comparisons. Therefore, it was possible to verify that in lower structures, combinations where wind has no effect are responsible for the highest resultant forces. However, increasing the free height of the portal significantly increases the bending moment forces on the columns, making this the main point to be taken into consideration in the future design of these elements.