异形钢管混凝土组合柱的抗震性能

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。

Seismic Behavior of Special Shaped Column Composed of Concrete Filled Steel Tubes

This paper experimentally investigated the behavior of a special shaped column composed of concrete-filled steel tubes (SCFST column) subjected to a constant axial load and a cyclically varying flexural load. The effects of both the axial compression ratio and the length to width ratio on the behavior (stiffness, strength, ductility, and energy dissipation) of SCFST columns were studied. The asymmetry character of the column was studied. The connection plate was an important member transferring shear force. The mono columns of SCFST columns worked together well and the seismic behavior of SCFST columns was good. An increase of the axial compression ratio increased the stiffness with a decrease of energy dissipation ability, ductility, and bearing capacity. On the other hand, an increase of the length to width ratio led to an increase of energy dissipation ability and ductility and a decrease of stiffness and bearing capacity. Furthermore, a finite element analysis was also carried out to simulate the behavior of SCFST columns and the test results agreed with the results of finite element analysis.