Comparative study of steel purlins in conventional beams, in planar trusses and multi-planar trusses / Estudo comparativo entre terças de aço, convencionais em vigas, em treliças planas e em treliças multiplanares

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Steel roof systems are widely used in buildings that require large free internal spaces and small execution times, such as commercial and industrial warehouses and storage and distribution centers. The purlins have a considerable contribution in the roof system total weight composition. In this work was developed a study on the different types of purlins for medium and large spans, up to 40 meters, analyzing the hot-rolled sections, cold-formed sections and trusses with open or hollow sections. Purlin design studies were conducted for hot-rolled and cold-formed sections, with a computational software development for these purlin types. The use of planar trusses as purlins, also called steel joists, is already well known, and its design was studied too, as well as the multi-planar tubular trusses, whose use is still small when compared with the other purlin types. With these studies, a comparative analysis was made for various spans, applying the loads commonly used in steel roof systems, allowing the investigation of the best purlin type for each proposed situation. An analysis of the purlin costs was also performed, allowing to study the feasibility of the tubular trusses use in steel roof systems, especially the multi-planar tubular trusses, whose application is still small

ASSUNTO(S)

estruturas metalicas treliças (construção civil) cobertura metalica aço - estruturas steel roofing tubular steel structures aço tubular - estruturas trusses structures steel steel structures

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