摘要
为适应复杂的海洋环境,该研究提出玄武岩纤维增强聚合物(basalt fiber reinforced polymer,BFRP)管钢筋混凝土柱,并采用拟静力试验和有限元软件OPENSEES研究其抗震性能,探讨BFRP管厚度、轴压比、长细比、纵筋直径和屈服强度对BFRP管钢筋混凝土柱破坏机理和抗震性能的影响规律。研究结果表明:试件的滞回环都比较饱满,均发生弯曲破坏;BFRP管厚度的增大使试件的承载力和耗能性能小幅提高,强度退化放缓;轴压比大的试件承载力高,耗能性能较强,但变形能力差,强度以及刚度退化较快;长细比的增大使试件的滞回曲线变得更为瘦长,整体刚度、峰值荷载、累积耗能大幅降低,同时极限位移明显增大;增大纵筋直径和提高纵筋屈服强度均可使试件的滞回曲线愈加饱满,初始刚度、峰值荷载以及累积耗能也得到有效提高。BFRP管混凝土柱相比于钢筋混凝土柱,多项抗震性能指标都比较优异,但是与钢管混凝土柱相比仍存在一定差距。
In order to adapt to the complex marine environment,a reinforced concrete-filled basalt fiber reinforced polymer(BFRP)tube column was presented.The seismic performance was studied with a pseudo static test and the 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 were 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 makes the hysteretic curves of the specimens plumper,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.
作者
李红健
陈林聪
宁西占
LI Hongjian;CHEN Lincong;NING Xizhan(College of Civil Engineering,Huaqiao University,Xiamen 361021,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第10期106-114,161,共10页
Journal of Vibration and Shock
基金
国家自然科学基金(12072118,51908231)
福建省自然科学基金(2019J01049)
厦门市青年创新基金(3502Z20206005)。
