Behavior of Circular Fiber-Reinforced Polymer-Steel-Confined Concrete Columns Subjected to Reversed Cyclic Loads: Experimental Studies and Finite-Element Analysis
Behavior of Circular Fiber-Reinforced Polymer-Steel-Confined Concrete Columns Subjected to Reversed Cyclic Loads: Experimental Studies and Finite-Element Analysis
复制标题
圆形纤维增强聚合物钢约束混凝土柱在反向循环荷载作用下的行为：实验研究和有限元分析
DOI：
10.1061/(asce)st.1943-541x.0002373
复制
发表时间：
2019-09-01
影响因子：
4.1
通讯作者：
Tsavdaridis, Konstantinos Daniel
中科院分区：
文献类型：
--
作者：
Wang, Yanlei;Cai, Gaochuang;Tsavdaridis, Konstantinos Daniel
本文对圆形纤维增强聚合物（FRP）-钢约束混凝土柱在低周反复荷载作用下的性能进行了试验研究。讨论了主要结构因素对柱循环性能的影响。试验结果表明，FRP钢约束RC柱和型钢混凝土柱具有良好的抗震性能。验证了玻璃纤维增强聚合物（GFRP）管和GFRP-钢管的侧向约束效果，并建立了基于OpenSees的简化有限元模型来模拟试验柱的试验结果。基于所建立的有限元模型，对影响GFRP约束钢筋混凝土柱低周反复荷载性能的主要因素进行了参数分析。通过试验和数值分析，探讨了在反复荷载作用下，侧限等参数对柱塑性铰区高度和峰值位移比的影响。结果表明，侧向约束对圆形约束RC柱的PHR高度有显著影响。基于对试验数据和文献资料的分析，提出了一个简单的模型来预测约束钢筋混凝土柱的峰值位移率。
This paper studied experimentally the behavior of circular fiber-reinforced polymer (FRP)-steel-confined concrete columns subjected to reversed cyclic loads. The influence of main structural factors on the cyclic behavior of the columns is discussed. Test results showed the outstanding seismic performance of FRP-steel-confined RC and steel-reinforced concrete (SRC) columns. The lateral confinement effectiveness of glass fiber-reinforced polymer (GFRP) tubes and GFRP-steel tubes was verified and a simplified OpenSees-based finite-element method (FEM) model was developed to simulate the experimental results of the test columns. Based on the proposed FEM model, a parametric analysis was conducted to investigate the effects of main factors on the reversed cyclic behavior of GFRP-steel-confined RC columns. Based on the test and numerical analyses, the study discussed the influence of variables such as the lateral confinement on the plastic hinge region (PHR) height and peak drift ratio of the columns under reversed cyclic loads. Results indicate that lateral confinement significantly affects the PHR height of circular confined RC columns. Based on the analyses of the data from this study and literature, a simple model was suggested to predict the peak drift ratio of confined RC columns.