Seismic Performance of Hybrid Columns of Concrete-Filled Square Steel Tube with FRP-Confined Concrete Core
Seismic Performance of Hybrid Columns of Concrete-Filled Square Steel Tube with FRP-Confined Concrete Core
复制标题
FRP混凝土核心筒方钢管混凝土混合柱抗震性能
DOI：
10.1061/(asce)cc.1943-5614.0000849
复制
发表时间：
2018-08-01
影响因子：
4.6
通讯作者：
Yu, Tao
中科院分区：
文献类型：
--
作者：
Feng, Peng;Cheng, Shi;Yu, Tao
对纤维增强聚合物（FRP）约束方钢管混凝土核心柱（SCFC）的抗震性能进行了试验研究。采用轴压比、混凝土强度等级、FRP管厚度和钢管厚度4个参数制作了14个SCFC试件，并进行了恒定轴压和反复水平荷载作用下的试验。测试数据的检查产生了一些重要的结论，关于所研究的柱参数对SCFC柱性能的影响。最重要的是，SCFC柱表现出良好的能量耗散和延性，即使在柱受到高轴向载荷。试验结果还表明，在高轴压比下，SCFC柱具有良好的抗侧力和位移延性。此外，一个良好的水平的平均刚度和等效粘性阻尼比进行了检查。此外，还研究了环向应变沿着柱高的变化规律、轴向位移与侧移比的关系以及塑性铰长度，以评价SCFC柱的抗震性能。
An experimental program that investigated the seismic performance of concrete-filled square steel tube with fiber-reinforced polymer (FRP)-confined concrete core (FCCC) column (SCFC) was conducted. Fourteen SCFC specimens were fabricated with four parameters of axial compression ratio, strength grade of concrete, thickness of FRP tube, and thickness of steel tube and tested under constant axial compression and reversed-cyclic lateral loading. Examinations of the test data resulted a number of significant conclusions with regard to the influence of the investigated column parameters on the performance of SCFC columns. Of primary importance, SCFC columns exhibit favorable energy dissipation and ductility, even when the columns were subjected to high axial loads. The results also indicate that SCFC columns delivered satisfactory lateral moment-bearing capacity and displacement ductility under high axial compression ratio. In addition, a good level of average stiffness and equivalent viscous damping ratio were examined. Furthermore, the variations of hoop strains along column height, the relationship of axial displacement-lateral drift ratio, and the plastic hinge length were examined to evaluate the seismic performance of SCFC columns.