Shear-compression tests on stone masonry walls strengthened with basalt textile reinforced mortar (TRM)
Shear-compression tests on stone masonry walls strengthened with basalt textile reinforced mortar (TRM)
复制标题
用玄武岩纤维增强砂浆（TRM）加固的砌石墙的剪切压缩试验
DOI：
10.1016/j.conbuildmat.2021.125804
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发表时间：
2022
影响因子：
7.4
通讯作者：
G. de Felice
中科院分区：
文献类型：
--
作者：
P. Meriggi;C. Caggegi;A. Gabor;G. de Felice
纺织增强砂浆 (TRM) 复合材料是预防地震多发地区无筋砌体失效和确保抗震保护的最有效技术之一。为了评估该技术对不规则石砌墙的适用性，本研究描述了在石灰岩砌石墙上进行的准静态循环剪切压缩测试，该墙是联合国教科文组织历史街区里昂和博若莱地区（法国）的典型特征。测试了四块中等规模的面板：一块未加固，一块抹灰，两块通过外部与石灰砂浆（BTRM）粘合的玄武岩织物加固，带有或不带有横向连接器和墙到基础锚栓。对 BTRM 进行机械表征是为了强调墙的整体行为对钢筋特性的依赖性。数字图像相关 (DIC) 用于彻底捕捉墙面损伤的发展情况。测试结果证明了 BTRM 在增强墙体抗剪强度和位移能力方面的有效性。结果还显示了连接器和锚杆的关键作用以及砂浆基质的不可忽视的贡献，从而可以研究当前指南提供的设计公式的可靠性。
Textile Reinforced Mortar (TRM) composites are one of the most effective techniques to prevent failure and ensure seismic protection of unreinforced masonry in earthquake-prone areas. Aiming at assessing the suitability of this technology for irregular stone masonry walls, this study describes quasi-static cyclic shear-compression tests carried out on limestone masonry walls, typical of the UNESCO historical district of Lyon and of the Beaujolais region (France). Four medium-scale panels were tested: one unreinforced, one plastered, and two strengthened by a basalt textile externally bonded with a lime mortar (BTRM), either with or without transversal connectors and wall-to-foundation anchors. The mechanical characterization of the BTRM was carried out to highlight the dependence of the overall behaviour of walls on the characteristics of the reinforcement. Digital Image Correlation (DIC) was used to thoroughly capture damage development over the wall surfaces. Test outcomes demonstrate the effectiveness of BTRM in enhancing the shear strength and the displacement capacity of the wall. The results also show the key role of connectors and anchors and the non-negligible contribution of the mortar matrix, allowing to investigate the reliability of the design formulations provided by the current guidelines.