Methodology of numerical research of trihedral trusses with continuous chords for planar roofs of buildings
Abstract
Methodology of numerical research of trihedral trusses with continuous chords for planar roofs of buildings
Incoming article date: 09.01.2023The formation of the structural form of the roof of trihedral trusses, each of which consists of two inclined flat trusses with a common lower chord, is considered. The design of the spatial truss is made with continuous chords of a closed composite section and a triangular slanting lattice from single rolling corners. The purpose of numerical research of a span trihedral trusses is to assess its stress-strain state with variability of influencing parameters. The methodology of numerical research is based on a calculated mathematical model of a trihedral truss with the application of single loads in the knots and allows you to obtain an array of stress-strain state data, taking into account the variability of the load, which is due to the characteristics of the construction region and the features of the enclosing structure of the roof. The structure of the spatial-stem model is based on a centered geometric scheme. The approbation of the presented methodology was carried out using a trihedral truss spatial-stem calculation model. As a result of numerical research of the proposed technique, data characterizing the stress-strain state of the trihedral truss model from a single nodal load were obtained. The analysis of the obtained results shows that the presented research methodology allows obtaining structured data taking into account the variability of load values and can have practical application of the calculation results in the design.
Keywords: trihedral truss; pentahedral composite profile; direct coupling knot; centered geometric scheme; stem calculation model