Design and experimental investigation of deep beams based on the Generative Tie Method

Abstract

The high level of shear stress present in reinforced concrete deep beams has been the subject of interest for a considerable number of studies due to the uncertainties involved. Several structural codes and standards around the world have recommended using the strut-and-tie method (STM) to design such elements. The STM is proven efficient and accurate, however, the successful application of the method relies decisively on the skills of the designer to conceive truss-like models. In this paper, a framework named Generative Tie Method (GTM) is proposed as an alternative approach to overcome some limitations of the available methods for the design of deep beams. The GTM uses performance ratios obtained from finite element analysis (FEA) as decision-making criteria on the reinforcement layout design of structural concrete members. The FEA strategy used in this approach is based on the elastic–plastic stress fields. The concrete compressive strength loss ratio is obtained using the modified compression-field theory. A large-scale experimental investigation using the digital image correlation technique was carried out on four deep beams designed by the proposed method. The suitable structural performance presented by the specimens demonstrated that the application of the GTM is promising even under unusual design requirements.