FINITE ELEMENT INVESTIGATION OF CONCRETE DEEP BEAM REINFORCED BY STEEL FRAME
A new steel reinforced concrete (SRC) beam, concrete deep beam reinforced by steel frame, was developed based on strut-and-tie mode of deep beams. In the paper experimental specimens of the SRC deep beam were simulated using finite element (FE) method, and analytical results were compared with experimental works, then effects of steel frame and reinforcements on mechanical behaviors of the newly developed deep beam were further studied. Results show that the failure mode of FE models matches phenomenon observed in experimental investigations, and the loaddeflection curve and maximum load are in good agreement with the experimental results. The angle of diagonal steel struts as members of steel frame is the most important parameter. With the increase of the angle of diagonal steel struts, the rigidity and ultimate bearing capacity of the SRC deep beams can be significantly improved. The ratio of bottom longitudinal flexural reinforcements should be controlled between the minimum ratio and 1.18％, in which bottom longitudinal flexural reinforcement can greatly enhance the rigidity, ultimate bearing capacity and ductility of the deep beams. Web reinforcement ratios mainly affect the ductility of the deep beams. SRC strut-and-tie model was formed in the concrete deep beams reinforced by steel frame according to analytical and experimental works, and loads were mainly transferred directly from the loading points to abutments.
Steel reinforced concrete (SRC) deep beam mechanical behavior finite element method (FEM)
Chun Yang Yi Wu Jian Cai Qing-Jun Chen
School of Civil Engineering and Transportation of South China University of Technology, Guangzhou 51 College of Civil Engineering of Guangzhou University, Guangzhou 510006, P.R. China
国际会议
广州
英文
738-744
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）