Design of a composite steel-concrete multi-storey building with high- strength steels and built-up sections

Resumo

One of the main advantages of the composite steel-concrete structures is the feasibility to explore the
combined potential of the materials, i.e., steel in tension and concrete in compression. The construction system
allows two materials to be used together in beams, columns, and slabs to obtain a building with excellent structural

performance. Therefore, this project aimed to evaluate the reduction of the self-weight of the structure of a multi-
story (G+7 story) building using steel-concrete composite structures together the use of high strength steels, such

as the ASTM A572 grade 65 (yield strength of 450 MPa). A complete building project of real building available
in the literature was used to be the comparison parameter for this study. Originally, the design present in the
literature adopted European rolled profiles with European S355 steel, which has yield strength similar to the ASTM
A572 grade 50 (yield strength of 345 MPa). A complete finite element model of the building was developed using
the finite element program Autodesk Robot Structural to carry out static and quasi-static structural analyses.
Design verifications were implemented and conducted in Visual Basic for Applications (VBA) and MS Excel®
macros using Brazilian design standards (NBR 8800 and NBR 6118) for ultimate-limit and serviceability states.
This paper is included in the context of an undergraduate final project work and present the state of the ongoing
research. At this first phase, the use of high-strength steel allowed the reduction of some built-up sections and
hence the total weight of the structure.