Influence of Design Parameters on Composite and Noncomposite Space Truss Structure Analysed Using ANSYS

Abstract

A space frame is a skeleton structural system assembled using linear elements so arranged that forces are transferred in a three-dimensional manner. Architects and engineers aim for new structural forms to accommodate large unobstructed areas. Space frames satisfy the objectives, and it provides lightness, economy, and speedy construction. Previous research investigation in the composite space truss, proved that using concrete slab acting compositely with the top chord member is to reduce the buckling of the compression chord members and also improve the overall behaviour of the space truss sturctures. The advantages of the composite space truss, gives confidence to use as floor system in the multistorey buildings. The composite space truss is influenced by various design parameters like cross-sectional area of the tubular member, support condition, module size and their depth, concrete strength and concrete slab thickness. The analysis of composite and noncomposite space truss as roof as well as floor for the building of size 30 m × 30 m was carried out using ANSYS software for varying design parameters. The overall maximum central deflection for the models was observed and compared with the codal provision. The load–deflection behaviour of the models was plotted, and the optimal solution for the noncomposite and composite space truss was arrived.