Concrete filled steel tubular (CFST) diagrid structures usually have connections intersected by four oblique CFST columns. In order to investigate the performance, capacity and failure mechanism of the connections, tw...Concrete filled steel tubular (CFST) diagrid structures usually have connections intersected by four oblique CFST columns. In order to investigate the performance, capacity and failure mechanism of the connections, two 1/5.5-scale specimens were tested under monotonic axial loading. The parameters in the study were the separation angle between columns. While the test was being conducted, the deflection, stress, failure pattern and capacity of the specimens were obtained and analyzed. In addition, the connection was analyzed using the general finite element analysis (FEA) software ABAQUS, with the purpose of investigating the mechanism, the weakness, the distribution of stress, and the bearing capacity of the connections. Experimental and numerical results indicate that the connecting separation angles resulted in the difference of failure modes and the mechanical behavior of the connections was similar to the behavior of CFST short columns.展开更多
基金The funding for the experiment carried out at the South China University of Technology was provided by the science foundation of Guangzhou Yuexiu Urban Construction International Financial Corporation, with Dr. Xiaodan Fang as the program director
文摘Concrete filled steel tubular (CFST) diagrid structures usually have connections intersected by four oblique CFST columns. In order to investigate the performance, capacity and failure mechanism of the connections, two 1/5.5-scale specimens were tested under monotonic axial loading. The parameters in the study were the separation angle between columns. While the test was being conducted, the deflection, stress, failure pattern and capacity of the specimens were obtained and analyzed. In addition, the connection was analyzed using the general finite element analysis (FEA) software ABAQUS, with the purpose of investigating the mechanism, the weakness, the distribution of stress, and the bearing capacity of the connections. Experimental and numerical results indicate that the connecting separation angles resulted in the difference of failure modes and the mechanical behavior of the connections was similar to the behavior of CFST short columns.
