A novel three-dimensional interface using immersive augmented reality to perform real-time visual analysis of structural models is presented. The interface integrates and builds on the functionalities of two commercial tools: 'Leonar3Do', for visual inspection in a fully three-dimensional immersive environment and 'SAP 2000', for structural analysis and simulation. The resulting interface allows the user to visualize the structural design model in three-dimensions, apply forces/loads directly with a three-dimensional physical pointer to indicate their magnitudes and directions and meanwhile observe the behavior of the structure under this action in fully perceived three-dimension. It integrates traditional structural analysis software, three-dimensional viewing and immersive virtual reality environment. The interface facilitates understanding of the different interactions between the structural components, detection of possible structural design weaknesses and improvement of the structural model in order to quickly develop better virtual prototypes.