In order to adapt to the complex marine environment, a reinforced concrete-filled Basalt Fiber Reinforced Polymer tube column is presented. The seismic performance is studied with the pseudo static test and finite element software OPENSEES. The effects of BFRP tube thickness, axial compression ratio, slenderness ratio, longitudinal reinforcement diameter and yield strength to the failure mechanism and the seismic response of the reinforced concrete-filled BFRP tube columns are examined. The results show that the hysteretic curves of the specimens are full, and they all show bending failure. The increase in the thickness of BFRP tube slightly increases the lateral strength and energy consumption performance of the specimen, and the strength degradation is alleviated. The specimen with higher axial compression ratio has higher peak load and energy consumption performance, but deformability is poorer, and strength and rigidity degrade quickly. The increase in slenderness ratio makes the hysteretic curve of the specimens more slender, integral stiffness, peak load and cumulative energy consumption reduce greatly, and at the same time ultimate displacement increases obviously. Increasing the diameter and yield strength of the longitudinal bars make the hysteretic curves of the specimens plumper, and the initial stiffness, peak load and cumulative energy consumption are effectively improved. Compared to the reinforced concrete column, the reinforced concrete-filled BFRP tube column has better seismic behavior indexes, but there is still a gap between it and the concrete-filled steel tube column.
Key words
BFRP tube /
reinforced concrete column /
hysteretic behavior /
quasi-static test /
OPENSEES
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