A system for optimum reinforcement design and non-linear analysis of reinforced concrete structures is presented. The specially-tailored program ORCHID (Optimum Reinforced Concrete Highly Interactive Dimensioning) is utilized for the reinforcement design and optimization. The commercially available program DIANA (DIsplacement ANAlyzer) is adopted for the nonlinear analysis and evaluation of the different reinforcement designs provided by ORCHID. It is demonstrated how the two programs intended to complete two separate tasks can be integrated in an environment for performance-based reinforcement design ensuring cost-effectiveness through optimization and structural safety through satisfying serviceability conditions. Examples of a oneway slab in bending and a deep beam in membrane action, highlighting the specific aspects of such an integrated analysis/design environment, are provided.

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