Indeterminate Truss Structure Analysis using Topological Load Redistribution Method

- Journal title : Journal of The Korean Society of Agricultural Engineers
- Volume 57, Issue 6, 2015, pp.59-68
- Publisher : The Korean Society of Agricultural Engineers
- DOI : 10.5389/KSAE.2015.57.6.059

Title & Authors

Indeterminate Truss Structure Analysis using Topological Load Redistribution Method

Choi, Won; Kim, Hanjoong;

Choi, Won; Kim, Hanjoong;

Abstract

Traditional structure analysis method is based on numerical matrix analysis to use the geometries consisting of the structure. The characteristics require a lot of computer memories and computational time. To avoid these weaknesses, new approach to analyze truss structure was suggested by adopting topological load redistribution method. The axial forces to be not structurely analyzed yet against outside loads were redistributed by using nodal equation of equilibrium randomly at each node without constructing global matrix. However, this method could not calculate the axial forces if structure is statically indeterminate due to degree of many indeterminacies. Therefore, to apply the method suggested in this research, all redundancies of truss structure were replaced by unit loads. Each unit load could make the deformation of a whole structure, and a superposition method was finally adopted to solve the simultaneous equations. The axial forces and deflections agreed with the result of commercial software within the relative error of 1 %, whereas in the case that the axial forces are relatively very smaller than others, the relative errors were increased to 2 %. However, as the values were small enough not to be considered, it was practically useful as a structural analysis model. This model will be used for structural analysis of truss type of large structure such as agricultural farming facility.

Keywords

indeterminate truss structure analysis;topological load redistribution method;superposition method;

Language

Korean

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