Analytical work on the response prediction of a hysteretic model for steel deck reinforced concrete (SDRC) diaphragms subjected to seismic loads was performed as part of the overall research diaphragm program conducted at Iowa State University (ISU). This work focused on the development of a hysteretic model with nonlinear, inelastic, degrading and pinching capabilities to predict the in-plane shear response of SDRC diaphragms under earthquake loads, and the definition of an analytical modeling scheme to include the effects of the diaphragm flexibility in the analysis of frame-wall structures;Predictive equations describing the hysteretic characteristics of the model were developed. Developed expressions consisted of the envelope curve equation, strength degradation factor, pinch force equation, hysteresis curve equation, and loop stiffness equations. Two different approaches were used in the model development: analytical and statistical method. The analytical method was used for the prediction of the pre-peak force-displacement envelope curve, and was based on strain compatibility and equilibrium conditions. Additionally, edge connectors and deck-to-concrete flexibility were included in this scheme;The statistical approach was based on results of 32 full-scale SDRC diaphragms tested under in-plane loads that were part of a previous phase of the research program at ISU. A pool of eleven regression models was used to select the model with the lowest mean absolute error for each particular characteristic to be described. Linear, multilinear, nonlinear, and stepwise regression analyses were used to identify parameters that significantly improved the predicted response;A review of the state-of-art in analytical macro-modelling of steel and concrete members was made. A model to incorporate the flexibility of diaphragm-wall connection was obtained. In addition, a methodology was reported in order to incorporate the effect of SDRC diaphragms in the dynamic analysis of structures;A computer program was also developed to perform the inelastic dynamic analysis of frame-wall structures including the effect of SDRC diaphragms. Finally, the computer code was verified against analytical solutions available in the literature.