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对轴向恒荷载和循环弯曲荷载作用下异形钢管混凝土异形组合柱(SCFST柱)的性能进行了试验研究。研究SCFST柱的轴压比和长宽比对其性能(刚度、强度、延性以及能量耗散)的影响,并对组合柱的不对称性进行了研究。连接板是传递剪力的主要构件。SCFST组合柱的各构件协同工作,具有较好的抗震性能。随着轴压比的增加,SCFST组合柱的刚度增大,耗能能力、延性和承载能力降低;另一方面,随着长宽比的增加,其耗能能力和延性增加,刚度和承载能力降低。此外,对SCFST柱的性能进行了有限元模拟,其结果与试验结果相吻合。
Experimental research was carried out on the performance of special-shaped CFST special-shaped columns (SCFST columns) under constant axial load and cyclic bending load. The effects of axial compression ratio and aspect ratio of SCFST columns on their properties (stiffness, strength, ductility and energy dissipation) were studied. Asymmetry of the composite columns was also studied. The connecting plate is the main component to transmit the shear force. The components of SCFST composite column work together and have better seismic performance. With the increase of axial compression ratio, the stiffness of SCFST composite column increases, and its energy dissipation capacity, ductility and load carrying capacity decrease. On the other hand, as the aspect ratio increases, its energy dissipation capacity and ductility increase, its stiffness and load carrying capacity reduce. In addition, the performance of the SCFST column was simulated by finite element method. The results are consistent with the experimental results.