Experimental study to unraveling the seismic behavior of CFRP retrofitting composite coupled shear walls for enhanced resilience

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES
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Abstract

This study focuses on the empirical examination of the nonlinear seismic performance of carbon fiber-reinforced polymer (CFRP)-strengthened composite coupled reinforced concrete (RC) shear walls. The experimental setup involves testing the structure in two distinct states, wherein CFRP sheets are utilized for retrofitting and reinforcement. In the initial phase, three samples undergo reinforcement utilizing distinct patterns of CFRP sheets. In the subsequent stage, an additional trio of specimens is fabricated and tested without the application of CFRP sheets. Subsequently, all structures are exposed to a load equivalent to 60 % of their flexural capacity. Following this, the tested specimens undergo retrofitting with CFRP sheets, utilizing the same patterns as in the initial phase. The retrofitted composite coupled shear walls are then subjected to retesting. The principal aim of CFRP retrofitting is to amplify the flexural and shear capacities of the specimens, empowering them to endure heightened seismic loads in comparison to their original configurations. This research contributes by evaluating ductility, ultimate strength, energy dissipation, and construction costs associated with composite coupled steel plate-concrete shear walls. All specimens underwent cyclic loading in accordance with the ATC-24 guidelines [1], which provide standard protocols for testing the cyclic performance of structural components. These guidelines, outline procedures for simulating seismic loading conditions in laboratory settings to evaluate the performance of structural systems under cyclic loading. Finally, a parametric study explores the impact of CFRP sheets and their adhesion patterns on the seismic behavior of composite coupled shear walls. The selection of the optimal retrofitting scheme considers the construction cost of each specimen based on the total area of CFRP sheets utilized.
揭示 CFRP 加固复合耦合剪力墙抗震行为的实验研究
本研究的重点是对碳纤维增强聚合物(CFRP)加固复合耦合钢筋混凝土(RC)剪力墙的非线性抗震性能进行实证检验。实验设置包括在两种不同状态下对结构进行测试,其中 CFRP 片材用于改造和加固。在初始阶段,三个样本利用不同模式的 CFRP 片材进行加固。在随后的阶段,在不使用 CFRP 片材的情况下,制作并测试另外三个试样。随后,所有结构都承受了相当于其抗弯能力 60% 的荷载。之后,利用与初始阶段相同的模式,对测试过的试样加装 CFRP 片材。然后对加装的复合耦合剪力墙进行重新测试。加装 CFRP 的主要目的是提高试样的抗弯和抗剪能力,使其能够承受比原始结构更高的地震荷载。本研究通过评估与钢板-混凝土复合材料耦合剪力墙相关的延展性、极限强度、能量消耗和建筑成本,为本研究做出了贡献。所有试样都按照 ATC-24 准则[1]进行了循环加载,该准则为测试结构部件的循环性能提供了标准协议。这些指南概述了在实验室环境中模拟地震加载条件的程序,以评估结构系统在循环加载下的性能。最后,一项参数研究探讨了 CFRP 片材及其粘合模式对复合材料耦合剪力墙抗震性能的影响。在选择最佳改造方案时,考虑了基于所使用的 CFRP 片材总面积的每个试样的施工成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Composites Part C Open Access
Composites Part C Open Access Engineering-Mechanical Engineering
CiteScore
8.60
自引率
2.40%
发文量
96
审稿时长
55 days
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