Structural and thermal performance of masonry walls: Insights from TRM-based upgrading techniques

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Flavio Stochino, Arnas Majumder, Andrea Frattolillo, Monica Valdes, Mauro Sassu, Fausto Mistretta
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Abstract

Masonry buildings, often constructed without adherence to modern seismic standards, are highly vulnerable to seismic events. Retrofitting techniques, such as Textile Reinforced Mortar (TRM), offer effective solutions for enhancing both structural and thermal performance. This study investigates the retrofitting of hollow clay-brick and concrete-brick masonry walls using TRM systems composed of various textile combinations, including galvanized steel and glass fiber textiles, as well as basalt fiber with Inox steel micro-fiber textiles, along with configurations of four or five diatons. Structural performance was evaluated through in-plane cyclic tests, demonstrating a significant increase in load-bearing capacity: approximately 90 % for clay-brick walls and 23 % for concrete-brick walls. To address energy efficiency, the TRM-upgraded/retrofitted walls were thermally upgraded with lime-based insulating mortar (mixed with recycled aggregates) and assessed in a climate chamber. Results revealed a substantial reduction in thermal transmittance for upgraded/retrofitted clay-brick and upgraded/retrofitted concrete-brick walls, and drops of about 44 % and 34 %, respectively, were observed compared to un-strengthened samples. Notably, the recycled aggregates are responsible for improving the insulation property of the masonry wall. Overall, the integrated TRM retrofitting approach effectively enhances both the seismic resilience and thermal efficiency of masonry structures.
砌体墙的结构和热性能:基于trm的升级技术的见解
砖石建筑通常不遵守现代地震标准,极易受到地震事件的影响。改造技术,如纺织增强砂浆(TRM),为提高结构和热性能提供了有效的解决方案。本研究调查了使用由各种纺织品组合组成的TRM系统对空心粘土砖和混凝土砖砌筑墙的改造,包括镀锌钢和玻璃纤维纺织品,以及玄武岩纤维与Inox钢微纤维纺织品,以及四或五个斜纹的配置。通过平面内循环试验评估了结构性能,表明承载能力显著提高:粘土砖墙的承载能力约为90 %,混凝土砖墙的承载能力约为23 %。为了解决能源效率问题,trm升级/改造的墙壁使用石灰基绝缘砂浆(与再生骨料混合)进行热升级,并在气候室中进行评估。结果显示,升级/翻新的粘土砖和升级/翻新的混凝土砖墙的热透射率显著降低,与未加固的样品相比,分别下降了约44% %和34% %。值得注意的是,再生骨料负责改善砌体墙的保温性能。总体而言,综合TRM改造方法有效地提高了砌体结构的抗震能力和热效率。
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来源期刊
Structures
Structures Engineering-Architecture
CiteScore
5.70
自引率
17.10%
发文量
1187
期刊介绍: Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.
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