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作者:

Zhang, Yufeng (Zhang, Yufeng.) | Bai, Yulei (Bai, Yulei.) (学者:白玉磊) | Han, Shiwen (Han, Shiwen.) | Milani, Gabriele (Milani, Gabriele.) | Jin, Xiaojie (Jin, Xiaojie.)

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摘要:

This paper proposed a novel composite column with exceptional resilience and corrosion resistance achieved through the casting of engineered cementitious composites (ECCs) in the plastic hinge region and the utilization of steel-FRP composite bars (SFCBs). A total of six specimens were tested under constant axial load and cyclic lateral load to examine their seismic performance and reparability. The influence of the type of longitudinal reinforcement (steel bar, SFCB, and GFRP bar) and the matrix type (ECC and concrete) in the plastic hinge region was discussed. Test results indicated that configuring SFCB in the columns facilitated drift-hardening characteristics, which in turn enhanced resilience. The adoption of ECC in the plastic hinge region further reduced residual deformation of the composite columns while significantly improving both lateral strength and ductility. The maximum repairable limit of the specimens increases by a factor of 1.36, 1.86, and 2.5, respectively, as the FRP content increases from 0% to 31.3%, 56.4%, and 100%. The specimens reinforced with SFCBs can be quickly restored to their intended use without repair, before reaching a 2% drift ratio. The slip effect of SFCBs has a substantial impact on increasing the lateral displacement of test columns, and this effect tends to increase with an increase in FRP content. A fiber model was developed for predicting the skeleton curves, and its accuracy was validated through comparisons between the predicted and test results.

关键词:

Resilience Fiber model SFCB ECC Slip Corrosion resistance

作者机构:

  • [ 1 ] [Zhang, Yufeng]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Bai, Yulei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Jin, Xiaojie]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Han, Shiwen]Harbin Inst Technol, Guangdong Prov Key Lab Intelligent & Resilient Str, Shenzhen 518055, Peoples R China
  • [ 5 ] [Milani, Gabriele]Politecn Milan, Dept Architecture Built Environm & Construct Engn, Piazza Leonardo Vinci 32, I-20133 Milan, Italy

通讯作者信息:

  • 白玉磊

    [Bai, Yulei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China

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来源 :

ENGINEERING STRUCTURES

ISSN: 0141-0296

年份: 2024

卷: 305

5 . 5 0 0

JCR@2022

被引次数:

WoS核心集被引频次:

SCOPUS被引频次: 14

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

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