Experimental and numerical study on compressive performance of perforated brick masonry after fire exposure

Zhang Jin; Zhang Qiang; Zhang Donghao; Xu Qingfeng; Li Weibin

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Experimental and numerical study on compressive performance of perforated brick masonry after fire exposure

机译：火灾后多孔砖砌体的抗压性能试验与数值研究

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This paper discusses the compressive performance of perforated brick masonry after fire exposure. Compressive strength tests of the mortar, clay perforated brick, and perforated brick masonry specimens were performed in accordance with ISO834 fire tests of different durations. The temperature distribution of the masonry materials and specimens was simulated using the finite element software ABAQUS, with the thermal parameters of masonry materials recommended by European standard Eurocode 6 and related literature. The compressive strength reduction factors of mortar and clay perforated brick exposed to different fire durations were calculated via the layered method suggested by European standard Eurocode 1. In addition, the compressive strength reduction factors after cooldown were obtained from the experimental data of the masonry materials, and by considering further reductions in the compressive strength after cooling from high temperatures. Experimental data of the masonry specimens were compared with the numerical results obtained using the reduction factors proposed in this work. The comparison revealed an overall acceptable approximation. Thus, the method presented in this paper can be used to evaluate the residual capacity of masonry structures after fire.

机译：本文讨论了火灾后多孔砖砌体的抗压性能。砂浆，粘土多孔砖和多孔砖砌体样品的抗压强度测试是根据不同持续时间的ISO834防火测试进行的。使用有限元软件ABAQUS模拟砖石材料和标本的温度分布，并使用欧洲标准Eurocode 6和相关文献推荐的砖石材料的热参数。通过欧洲标准Eurocode 1建议的分层方法，计算了在不同火灾持续时间下的砂浆和粘土多孔砖的抗压强度折减系数。此外，从砌体材料的实验数据中得出了冷却后的抗压强度折减系数，并考虑进一步降低高温冷却后的抗压强度。将砌体标本的实验数据与使用本文提出的折减系数获得的数值结果进行了比较。比较显示总体可接受的近似值。因此，本文提出的方法可用于评估火灾后砌体结构的剩余容量。

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来源
《Fire and materials》 |2019年第2期|200-218|共19页
作者
Zhang Jin; Zhang Qiang; Zhang Donghao; Xu Qingfeng; Li Weibin;
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作者单位

Southeast Univ, Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, Nanjing, Jiangsu, Peoples R China;

Southeast Univ, Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, Nanjing, Jiangsu, Peoples R China;

China Shanghai Architectural Design & Res Inst Co, Shanghai, Peoples R China;

SRIBS, Shanghai Key Lab Engn Struct Safety, Shanghai, Peoples R China;

Southeast Univ, Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, Nanjing, Jiangsu, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
after-fire exposure; compressive strength; high-temperature exposure; numerical calculation; perforated brick masonry; reduction coefficient;

机译：火灾后暴露;抗压强度;高温暴露;数值计算;多孔砖砌体;折减系数;

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机译：着火的多孔砖砌体墙抗震性能的试验研究
2. Experiment and Numerical Simulation on Axial Compressive Performance of Autoclaved Fly Ash Solid Brick Masonry Columns [J] . XU Chunyi, LIU Ming, ZHOU Haiying 天津大学学报：英文版 . 2011,第006期

机译：蒸压粉煤灰实心砖砌体柱轴向抗压性能试验与数值模拟
3. Experiment and Numerical Simulation on Axial Compressive Performance of Autoclaved Fly Ash Solid Brick Masonry Columns [J] . XU Chunyi, LIU Ming, ZHOU Haiying 天津大学学报（英文版） . 2011,第006期

机译：蒸压粉煤灰实心砖砌体柱轴向抗压性能试验与数值模拟
4. Experimental and Numerical Simulation Study on Compressive Performance of Autoclaved Fly Ash Perforated Brick Masonry Long Columns [C] . Chunyi Xu, Ming Liu, Bo Xu International Conference on Civil Engineering,Architecture and Building Materials . 2011

机译：高压灭菌粉煤灰穿孔砖砌砌体长柱压缩性能的实验性和数值模拟研究
5. Statistical analysis of compressive strength of clay brick masonry prisms. [D] . Aryana, Saman Afqahi. 2006

机译：黏土砖砌体棱镜抗压强度的统计分析。
6. Thermal performance of brick and stone masonry: Cumulative heat flux dataset for main orientations and under diverse seasonal conditions [O] . Loukas Georgiou, Christiana Panteli, Angeliki Kylili, 2020

机译：砖块砌体的热性能：主要取向和各种季节性条件下的累积热通量数据集
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。
8. In-Depth Study Report: Control Technology for Crystalline Silica Exposures in Construction: The Effect of Exhaust Flow Rate Upon the Respirable Dust Emissions for Tuck Pointing Operations and a Preliminary Evaluation of a Ventilated Tool for Brick Cutting at International Masonry Institute, Cascade, Maryland. [R] . Heitbrink, W. A., Watkins, D. S. 2001

机译：深入研究报告：结构二氧化硅暴露在施工中的控制技术：排气流量对塔克指向操作的可吸入粉尘排放的影响以及马里兰州卡斯卡德国际砌体研究所用于砖切割的通风工具的初步评估。

Experimental and numerical study on compressive performance of perforated brick masonry after fire exposure

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