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Seismic Behaviors and Resilience of Concrete-encased Concrete-Filled Steel Tubular Columns with Debonded High-Strength Rebars: Experiment and Assessment
Journal of Earthquake Engineering ( IF 2.6 ) Pub Date : 2022-03-07 , DOI: 10.1080/13632469.2021.1989345
J.H. Wang 1 , Y.P. Sun 2
Affiliation  

ABSTRACT

A total of six cantilever square concrete-encased CFST columns were fabricated for testing under both lateral load and constant compressive load. The debonded high-strength PSB 930 steel rebars were used as the longitudinal rebar to provide resilience for specimen columns. Experimental results indicated that the specimens with debonded PSB longitudinal rebars had smaller residual deformation and smaller yield sectional stiffness compared with the specimen with normal steel rebars because the yielding progress of the longitudinal rebar was delayed. Based on the parametric analytical results, some models are proposed to assess the yield and post-yield sectional stiffness and the residual drift.



中文翻译:

带脱粘高强度钢筋的混凝土包裹混凝土钢管柱的抗震性能和回弹力:实验和评估

摘要

总共制造了六个悬臂方形混凝土包裹的CFST柱,用于在横向载荷和恒定压缩载荷下进行测试。剥离的高强度 PSB 930 钢筋用作纵向钢筋,为试样柱提供弹性。试验结果表明,由于纵向钢筋的屈服进程延迟,与普通钢筋试样相比,脱粘PSB纵向钢筋试样的残余变形和屈服截面刚度较小。基于参数分析结果,提出了一些模型来评估屈服和屈服后截面刚度以及残余漂移。

更新日期:2022-03-07
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