The micro truss model: An innovative rational design approach for reinforced concrete

Abstract

The strut and tie models have been widely used as an effective tool for designing reinforced concrete structures. The concrete is considered to carry only compressive forces through, while the tension forces are carried by reinforcing steel. The strut and tie model is effective for designing disturbed regions, however, it is essential that the designer should have a minimum level of experience to assume optimum trusses. In this study, a generalization of the strut and tie model is introduced through the micro truss model, in which, small isotropic truss members are used and the macro strut and tie model are automatically obtained. Both material and geometrical nonlinearity are introduced. The proposed model can be used for both design and checking the nonlinear response of reinforced concrete structures. The model has been verified through published experimental results. Rational steps of design have been incorporated and examples of design have been illustrated.