Finite Element Numerical Simulation Of SRC Cantilever Deep Beam

As a new configuration of composite beam, the cantilever deep beam of steel reinforced concrete (SRC), with embedded section steel or steel plate, stems from the cantilever deep beam of reinforced concrete (RC). With the advantages of high strength, high capacity, and the cross-section is easy to meet the requirements of building space, the cantilever deep beam of steel reinforced concrete has broad prospects in engineering. There is little theoretical and experimental research on the cantilever deep beam of steel reinforced concrete at present, particularly about the finite element analysis in this issue. Both theoretical and practical value will be obvious in this study.The researcher developed a finite element model of the cantilever deep beam of steel reinforced concrete (SRC-2), which is the reduced scale SRC beam of the Grand Theater of Chongqing, based on the concrete damaged plastic model of ABAQUS. By comparative analysis on the result of test and the FEM model, the researcher found that the model can reflect the macro-mechanical behavior of the SRC beam. Based on the experiment and the FEM models, some impact factors, failure mechanism and weak load-bearing zone about the bearing capacity of SRC deep beam are found. The optimized improvement was proposed. The main contents are as follows:â‘ By comparative analysis on the result of test and the simulation, the validity and applicability of the FEM model about SRC deep beam base on the concrete damaged plastic model of ABAQUS is verified.â‘¡Some factors such as concrete strength, steel ratio, distribution reinforcement ratio, longitudinal reinforcement ratio, which maybe impact on the bearing capacity of SRC beam are studied. The main factors such as concrete strength and distribution reinforcement ratio are found.â‘¢For the stress mechanism of SRC deep beam and its weak load-bearing zone, the improvements, with steel plate and steel braces embedded, to enhance the ultimate capacity of SRC deep beam, are introduced from the SRC shear wall. Comparing of three improvements, the best one that has parallel double inclined braces is proposed.