Análise teórica e experimental de ligações soldadas em estruturas de aço submetidas a ensaios de tração.

Abstract

The use of steel in metallic structures, although old, has gained space as its productive process becomes viable and trustworthy, and because of the greater variability, the connection points between pieces become a critical point of analysis. Therefore, the present work deals with general aspects of structural steel utilization, with emphasis on connections between parts made by welding processes. Initially, the work bases the use of welded connections in bibliographical revision and later, it’s dimensioned a metallic structure according to the determinations of the Brazilian norm NBR 8800:2008, and then the structure is submitted to traction tests to determine the mechanical properties of the weld material and the steel flow of the parts. Finally, the results are compared with the previous design, in order to prove the efficiency and compatibility of the calculation model with the analyzed structure. The results of experimental resistance, although higher than those suggested by the standard, present considerable variation between the different tested specimen, therefore, the high normative coefficients are justifiable.