Análise orçamentária comparativa entre estrutura metálica e estrutura de concreto pré-moldado para um caso específico de galpão industrial em João Pessoa - PB

Abstract

Cost analysis and feasibility studies for the adoption of elements within a work are essential for the success of the project. In this sense, the present work is a budgetary analytical study of direct costs of materials, labor and equipment applied to a standard architectural project, defined by ABNT 12721: 2006 for industrial warehouses. The warehouses are structural structures commonly used in industry, where a large part of their cost refers to their structural components. The typologies studied are a project in metallic structure and a project in precast concrete, for which the dimensioning was developed, the calculation considerations were detailed, structural planks were made, quantitative works, for later budget analysis using as a reference of prices based on public compositions of SINAPI (National System of Research of Costs and Indices of Civil Construction) for the month of February 2020 in the state of Paraíba. For the design, calculation, details and quantitative surveys of the structures, the software Cype 3D applied to the metallic structure was used and CypeCad applied, under some considerations and adjustments, to the precast concrete structure. The analyzes carried out relate, for the projects conceived, the direct costs for the different groups of constituent parts to the structural design of the shed, classified into pillars, locking beams, roof support elements, thirds and braces. From such analyzes it was found a higher total direct cost for the structure designed in steel, although, when analyzing the types of costs, it was found that precast concrete structures have a higher direct cost related to equipment and labor. Budgetary analysis also found that structural parts normally subjected to bending are less costly in metal structures, while parts subjected to compression point precast concrete as more advantageous, thus justifying the existence and adoption of mixed steel and concrete structures.