Seismic experimental research on damaged resilient reinforced concrete columns retrofitted by FRP sheets

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-03-17 DOI:10.1016/j.engstruct.2025.120119

Yunjian He , Gaochuang Cai , Cheng Xie , Prafulla Bahadur Malla , Yiyuan Li , Amir Si Larbi

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引用次数: 0

Abstract

The post-earthquake repairability was an attractive advantage of reinforced concrete (RC) frame structures with resilient RC (RRC) members. This paper investigates the seismic behavior of six RRC columns repaired with different fiber-reinforced polymer (FRP) types, the number of FRP layers, and additional steel plates. The results indicate that all original RRC columns exhibited a drift-hardening behavior before the drift ratio reached 3.0 %, while the residual drift ratio was less than 0.5 %. FRP-repaired RRC columns can achieve even higher peak strength than the original columns and effectively control their residual deformation. The increase in the number of carbon FRP (CFRP) layers leads to a decrease in residual displacement, while the type of FRP has no significant effect. Compared with the Aramid FRP-repaired column, the CFRP-repaired column showed higher initial stiffness and lower stiffness degradation rate. The FRP-steel plate repaired columns showed the highest initial stiffness and energy dissipation capacity. A simplified model containing two yield points was proposed to evaluate the residual displacement of the repaired RRC column referring to the FEMA’s recommendation which was based on the displacement at steel bar yield. In addition, a bilinear skeleton model curve based on a simplified hysteresis loop rule was proposed to predict the hysteresis behavior of the repaired RRC columns.

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.