Optimum Plane Trusses among Different Cross Sections (original) (raw)

2015

Abstract

This work aims to find the optimum cross section shape that offers optimum plane trusses. The expression optimal structure is extremely vague because of the structure may be optimal in different aspects. These aspects are known as objectives. Weight optimization of structures plays a major role due to its significant effect to overall costs. The research uses finite element method by the aid of STAAD software for analysis and sizing optimization design for six trusses types which are common used for span12m. Different cross sections shapes are used to verify the one that gives optimal truss weight. Many of previous existing researches employ the areas of cross sections as design variables without heightening to the shape of cross section at the beginning of the process: accordingly the result area may be not sufficient in case that the designer do not select the effective shape than others. Results of this paper show that the chosen cross section shape has a significant impact on the weight trusses optimization which is formulated selecting a set of design variables that represent the structural and architectural configuration of the system.

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