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Experimental and numerical analysis on the structural fire behaviour of three-cell hollowed concrete masonry walls

机译：三电池镂空混凝土砌体结构火灾行为的实验与数值分析

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摘要

Masonry is one of the oldest and most traditional materials in building construction. Nevertheless, the knowledge on the structural fire behaviour of masonry elements is not yet well consolidated. The literature on the load bearing capacity of masonry walls in case of fire showed an enhanced performance of these elements, however the lack of normative documents, characterization of material properties at high temperatures and experimental results, for calibrating and validating the numerical models, indicates the need of further research. A research study on the structural fire behaviour of three-cell hollowed concrete masonry walls subjected to fire is presented based on results of experimental and numerical studies. First, several loadbearing capacity tests at high temperatures and fire resistance tests on the walls, were carried out in order to assess their behaviour, critical times, failure modes and temperature distribution. The specimens were built with three cell concrete blocks and M10 mortar and were then subjected to an in-plane serviceability load during test. The temperatures, loads and displacements were measured. Second, finite element models were developed and validated with the experimental results. The experimental and numerical results were also compared with the ones given by EN1996-1-2 provisions.
机译：砌体是建筑施工中最古老，最传统的材料之一。然而，对砌体元素结构火灾行为的知识尚未巩固。在火灾的情况下，砌体墙承载力的文献表明，这些元素的性能提高，但缺乏规范文献，在高温下表征材料特性和实验结果，用于校准和验证数值模型，表示需要进一步研究。基于实验性和数值研究的结果，提出了对火灾的三封闭混凝土砌体墙体结构火灾行为的研究。首先，进行几种在墙壁上的高温和耐火性测试的负载容量测试，以评估其行为，关键时间，故障模式和温度分布。试样用三个细胞混凝土块和M10砂浆构建，然后在试验期间进行面内可用性负荷。测量温度，载荷和位移。其次，开发了有限元模型并用实验结果验证。还与EN1996-1-2规定给出的实验和数值结果进行了比较。

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