Automatic generation of truss model for optimal design of reinforced concrete structures

This paper provides a new approach to the computer-aided design of distribu ted (D) regions of concrete structures. An optimization approach is used to define the topology of the equivalent truss structure (location and amount of reinforcement, and position of compressive struts) needed to provide a specified load capacity while requiring an absolute minimum volume of reinf orcement. The algorithms (and software) include two new features: 1) a prac ticality factor beta to avoid the generation of impractical reinforcement l ayout; and 2) a stress redistribution factor alpha related to the total pla stic energy required in developing the capacity of a given truss. Compariso ns between alternate optimal solutions and between theory and experiment ar e provided.