This paper is concerned with the effect of prestress on the minimum weight design of singly loaded trusses which are required to satisfy stress constraints. Use is made of realizability theorems to derive two distinct formulations-the equilibrium formulation and the hybrid formulation, in a linear programming form. The former has the member forces as unknown variables whereas the latter searches directly for the prestressing system and calculates the member forces a posteriori. A 72-bar double layered grid is used as an example to show weight savings of up to 37%.
ASJC Scopus subject areas
- Civil and Structural Engineering
- Modeling and Simulation
- Materials Science (all)
- Mechanical Engineering
- Computer Science Applications