高温对 FRCM 混凝土的影响

IF 3 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Structural Concrete Pub Date : 2024-08-01 DOI:10.1002/suco.202301022

Klajdi Toska, Flora Faleschini, Anne‐Lise Beaucour, Carlo Pellegrino, Albert Noumowe

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引用次数: 0

摘要

本文研究了高温暴露对通过织物/纤维增强复合材料约束的混凝土性能的影响。使用两种类型的碳纤维（干碳纤维和环氧树脂涂层碳纤维）对小型圆柱形试样（150 × 300 毫米）进行了约束。为了便于比较，所有试样都使用了两层限制层。固化后，圆柱体暴露在 20°C（环境温度）、80°C、100°C 和 250°C 四种升温范围内，冷却后在压缩循环载荷下进行测试。实验结果表明，热应力极大地影响了织物增强复合材料的约束效果。暴露在高温下会降低极限约束强度，并显著影响整体轴向应力-应变行为。

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Effect of high temperature on FRCM‐confined concrete

The paper investigates the effect of high temperature exposure on the performance of concrete confined through textile/fabric‐reinforced composites. Small‐scale cylindrical specimens (150 × 300 mm) were confined using two types of carbon fibers (dry and epoxy‐resin coated). For the sake of comparison, two confining layers were applied to all specimens. After curing, cylinders were exposed to four ranges of increasing temperatures—being 20°C (ambient), 80°C, 100°C, and 250°C and, after cooling down, were tested under compressive cyclic loading. The experimental results show that thermal stress significantly influences the confinement effectiveness of textile‐reinforced composites. Exposure to high temperatures reduces the ultimate confined strength and significantly influences the overall axial stress–strain behavior.

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来源期刊

Structural Concrete CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

5.60

自引率

15.60%

发文量

284

审稿时长

3 months

期刊介绍： Structural Concrete, the official journal of the fib, provides conceptual and procedural guidance in the field of concrete construction, and features peer-reviewed papers, keynote research and industry news covering all aspects of the design, construction, performance in service and demolition of concrete structures. Main topics: design, construction, performance in service, conservation (assessment, maintenance, strengthening) and demolition of concrete structures research about the behaviour of concrete structures development of design methods fib Model Code sustainability of concrete structures.