NONLINEAR ANALYSIS OF REINFORCED CONCRETE CONTINUOUS DEEP BEAMS USING STRINGER-PANEL MODEL

This paper describes the numerical tests for the nonlinear analysis of eight reinforced concrete (RC) deep beams. A stringer-panel model is presented for the nonlinear analysis of the deep beams. Cracked reinforced concrete is treated as an orthotropic material. To model nonlinear material response, the constitutive relations currently utilized are those of the modified compression Field theory. Stiffness matrices are defined for concrete and reinforcement, and element stiffness matrices are derived for stringer and panel elements. A solution algorithm is described. The ability of the stringer-panel model to assess ultimate load is evaluated by correlation studies with available experimental data. The computational efficiency, numerical stability, and potential application of the model are demonstrated through example analyses.