高温下cfrp包覆轻量混凝土的修复和加固

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-04-01 DOI:10.1016/j.dibe.2025.100654

Rami Hawileh, Hind Alharmoodi, Abdallah Hajjaj, Abdulaziz Aljarwan, Sumit Sahoo, Jamal Abdalla

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引用次数: 0

摘要

轻质混凝土已被证明是有效的材料，因为它具有高强度重量比，成本效益，改进的隔音和耐火性能。然而，关于轻质混凝土（LWC）暴露在高温下的约束行为的数据很少，特别是当被纤维增强聚合物（FRP）包裹时。本研究探讨了碳纤维复合材料（CFRP）复合材料加固和修复LWC在高温下的行为。用CFRP复合材料包裹的LWC试样在20°C至800°C的温度范围内进行了实验测试。诸如抗压强度、应力-应变行为、弹性模量和失效模式等参数被评估为温度升高的函数。建立了抗压强度和弹性模量随温度变化的分析模型，并与实验数据进行了验证。本研究的结果支持使用CFRP包装在中等温度下部分恢复LWC压缩构件的强度和弹性，增强其在火灾易发应用中的弹性。

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Repair and strengthening of CFRP-wrapped lightweight concrete exposed to elevated temperatures

Lightweight concrete has proven effective material due to its high strength-to-weight ratio, cost-effectiveness, improved sound insulation, and fire resistance. However, there is scarce data on the confinement behaviour of the lightweight concrete (LWC) exposed to elevated temperatures, particularly when wrapped with fiber-reinforced polymers (FRP). This study explores the behaviour of LWC strengthened and repaired with carbon FRP (CFRP) laminates tested under elevated temperatures. LWC specimens wrapped with CFRP laminates are tested experimentally under temperatures varying from 20 °C to 800 °C. Parameters like compressive strength, stress-strain behaviour, elastic modulus, and failure modes are evaluated as a function of increasing temperature. Analytical models are developed to estimate the degradation on compressive strength and elastic modulus with temperature and validated against experimental data. The outcomes from this study support the use of CFRP wraps to partially restore the strength and elasticity in LWC compression members at moderate temperatures, enhancing its resilience in fire-prone applications.

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.