Experimental characterization and capacity assessment of GFRP retrofitted AAC block masonry

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-04-09 DOI:10.1016/j.engfailanal.2025.109595

Suraj Malla , Purushotam Dangol , Dipendra Gautam

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引用次数: 0

Abstract

Masonry buildings reflect a suboptimal performance during strong to major earthquakes. Seismic enhancement of masonry buildings is thus instrumental because masonry is still the most dominant structural system adopted to construct residential buildings in many active seismic regions worldwide. The present study performs experimental characterization of autoclaved aerated concrete (AAC) blocks, polymer modified mortar (PMM), AAC prisms, and AAC wall panels to highlight the efficacy of alternative construction material that is gaining increasing attention lately. Compressive strengths of units and prisms as well as shear strength of walls with and without glass fiber reinforced polymer (GFRP) are reported in this paper. The experimentally characterized material properties are also deployed to a code recommended two story case study structure and eigenvalue analysis and capacity assessment through static nonlinear pushover analysis are performed. The effect of aspect ratio is assessed for both with and without GFRP scenarios. The polymer modified mortar is found to be efficient in enhancing the crushing strength of mortar to be used in AAC block masonry. The sum of observations highlights that the introduction of GFRP in a two story building results in the enhancement of the fundamental frequency by at least 16%. Similarly, considerable enhancement in seismic capacity of AAC masonry is possible with the use of GFRP. Furthermore, GFRP is found to be effective in enhancing both compressive strength and shear strength of AAC block masonry with PMM.

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GFRP加固AAC砌块砌体的试验表征及承载力评价

砖石建筑在强地震到大地震中表现不佳。因此，砌体建筑的抗震增强是有帮助的，因为在世界上许多地震活跃地区，砌体仍然是建造住宅建筑最主要的结构体系。本研究对蒸压加气混凝土（AAC）砌块、聚合物改性砂浆（PMM）、AAC棱镜和AAC墙板进行了实验表征，以突出最近越来越受到关注的替代建筑材料的功效。本文报道了加玻璃钢和不加玻璃钢的墙体单元和棱柱的抗压强度以及墙体的抗剪强度。并将实验表征的材料性能应用于规范推荐的两层结构案例研究，通过静态非线性推覆分析进行结构特征值分析和能力评估。在有和没有GFRP的情况下，评估了纵横比的影响。聚合物改性砂浆可有效提高AAC砌块砌体砂浆的抗压强度。总的观察结果表明，在两层建筑中引入玻璃钢可使基频提高至少16%。同样，使用GFRP可以显著提高AAC砌体的抗震能力。GFRP对混凝土砌块砌体抗压强度和抗剪强度均有显著提高。

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

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.