Computer Graphics in Detailing Strut‐Tie Models

Abstract

An interactive computer‐graphics program implementing the strut‐tie model approach for analysis and design of reinforced and prestressed concrete members is presented. The program consists of three parts. The first and second parts can be considered as a pre‐ and postprocessor for a finite element code to analyze plane stress and plane strain problems as well as plane truss problems. The results of the first part (direction of compressive principal stresses) provide guidance in the development of strut‐tie models. In the second part of the program, the chosen strut‐tie model is analyzed to determine the forces in the individual components of the model. The third part is a design routine for dimensioning and detailing the components of the proposed strut‐tie model (struts, nodes, ties). The features and the interaction between the parts of the program are demonstrated with the design of a reinforced concrete, dapped‐end beam. Computer graphics is shown to be an efficient way to develop and detail strut‐tie models for the design of reinforced concrete structures.