A computer-based tool for strut-and-tie model design of structural concrete

The strut-and-tie model (STM) method has been recognized as an efficient methodology for the design of structural concrete disturbed stress regions (D-regions) and is used in design codes worldwide. However, the method requires iterative solution, numerous graphical calculations, and is time consuming. Further it involves designer’s experience in the development of appropriate STM. In this study, a computer graphics program that enables the analysis and design of structural concrete efficiently is presented. This graphics program enables the designer to overcome the implementation drawbacks mentioned above. The program incorporates analysis and design capabilities, including finite element linear/nonlinear analysis programs for the plane truss and solid problems, a module for the automatic determination of effective strengths of struts and nodal zones, and one for the graphical verification of appropriateness of STM by displaying various geometrical shapes of struts and nodal zones.