Research on seismic behavior of BFRP-confined reinforced concrete circular and square columns

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Dec.2024, Vol.47 No.12: 1704-1708, 1714

DOI: 10.3969/j.issn.1003-5060.2024.12.019

Authors

HUANG Jingting $ ^{1} $, GAO Peng $ ^{2} $, HU Lingzhi $ ^{1} $

(1. School of Urban Construction and Transportation, Hefei University, Hefei 230601, China; 2. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: To investigate the seismic behavior of reinforced concrete (RC) circular and square columns confined with basalt fiber reinforced polymer (BFRP), three confined and control columns were tested under low cyclic lateral loading, respectively. The influence of parameters such as axial compression ratio and cross section shape on the seismic behavior was investigated. The results show that the columns present flexural failure mode after confinement. The load carrying capacity, ductility and energy dissipation capacity of columns are improved. With the increase of axial compression ratio, the load carrying capacity of confined columns rises and the ductility and energy dissipation capacity drop. With the same cross section area and longitudinal reinforcement ratio, the peak load and elastic stiffness of the confined square columns are larger than those of the confined circular columns, but the deformation and energy dissipation capacity of the former are slightly smaller than those of the latter. Finally, the seismic bearing capacities of BFRP-confined RC circular and square columns are calculated with relatively high accuracy, respectively.

Keywords: basalt fiber; confined circular columns; confined square columns; low cyclic lateral loading; seismic behavior

作者信息

黄镜淳 $ ^{1} $，高鹏 $ ^{2} $，胡凌志 $ ^{1} $

(1. 合肥大学城市建设与交通学院, 安徽合肥 230601; 2. 合肥工业大学土木与水利工程学院, 安徽合肥 230009)

摘要和关键词

摘要: 为研究玄武岩纤维增强聚合物(basalt fiber reinforced polymer, BFRP)约束钢筋混凝土圆柱和方柱的抗震性能,文章分别对3根约束柱和对比柱开展低周反复侧向加载试验,研究轴压比、截面形状等参数对加固柱抗震性能的影响。结果表明:约束柱皆为弯曲破坏模式,其承载、延性和耗能能力均有上升;随着轴压比增大,加固柱承载力增大,延性和耗能性能降低;在相同截面面积和纵筋配筋率下,加固方柱的峰值荷载和弹性刚度比加固圆柱明显较大,但变形及耗能性能略小。最后分别计算BFRP布约束钢筋混凝土圆柱和方柱抗震承载力,所得结果的预测精度较高。

关键词: 玄武岩纤维；约束圆柱；约束方柱；低周反复侧向加载；抗震性能

Funding

国家自然科学基金资助项目(52208158); 安徽省高校重点自然科学研究资助项目(2022AH051805)和合肥大学人才科研基金资助项目(21-22RC38)

合肥工业大学学报(自然科学版)

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