Resistance of cracked concrete composite for direct fire exposure

机译：开裂的混凝土复合材料的耐直接火暴露性

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In this paper a cracked concrete panels are exposed to the direct fire. The cracks are made by the researchers during the casting of the concrete panels. These pre-cracks are mainly of mixed mode type which will be under both compression and shear stresses. These concrete panels are studied under the thermal stresses only and then studied under static loading in addition to the thermal effect. The cracked are monitored during the concrete exposure to the fire. The fracture resistance to the fire is studied in addition to strength of the concrete material. The concrete panels are exposed to different degrees of temperature and different times for thermal effect. The results are very exciting and good.

机译：在本文中，破裂的混凝土面板暴露于直接火中。研究人员在浇铸混凝土面板时产生了裂缝。这些预裂纹主要是混合模式类型，将同时处于压缩应力和剪切应力下。这些混凝土面板仅在热应力下进行研究，然后除了热效应外还在静态载荷下进行研究。在混凝土暴露于火中期间监测裂缝。除了混凝土材料的强度外，还研究了耐火的断裂强度。混凝土板暴露于不同温度和时间以产生热效应。结果非常令人兴奋和良好。

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《International Structural Engineering and Construction Conference(ISEC-03); 20050920-23; Shunan(JP)》|2005年|P.299-307|共9页
会议地点 Shunan(JP)
作者
R. El-Sheikhy;
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作者单位

Osaka University, JAPAN;

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原文格式 PDF
正文语种 eng
中图分类混凝土结构、钢筋混凝土结构;
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1. Fire-Resistance Mechanism and Residual Bearing Capacity of Prestressed Concrete Beams after Fire Exposure [J] . Yu Ying, Hang Zhenyuan, Zhao Wei, Journal of structural engineering . 2021,第8期

机译：火灾曝光后预应力混凝土梁的防火机理及残余承载力
2. Fire resistance of reinforced concrete bearing walls subjected to all-sided fire exposure [J] . S. Lee, C. Lee Materials and structures . 2013,第6期

机译：钢筋混凝土承重墙的耐火性
3. Fire resistance of reinforced concrete bearing walls subjected to all-sided fire exposure [J] . S. Lee, C. Lee Materials and Structures . 2013,第6期

机译：钢筋混凝土承重墙的耐火性
4. Resistance capacity of repaired cracked concrete composite structural elements for collapse [C] . R. El-Sheikhy International Structural Engineering and Construction Conference(ISEC-03); 20050920-23; Shunan(JP) . 2005

机译：修复后的开裂混凝土复合结构构件的抗倒塌能力
5. Fibre reinforced polymers (FRP) and FRP-concrete composites subjected to various loads and environmental exposures. [D] . Homam, Sayed Mukhtar. 2005

机译：纤维增强聚合物（FRP）和FRP-混凝土复合材料承受各种载荷和环境影响。
6. The Fire Resistance Performance of Recycled Aggregate Concrete Columns with Different Concrete Compressive Strengths [O] . Hongying Dong, Wanlin Cao, Jianhui Bian, 2014

机译：不同抗压强度的再生骨料混凝土柱的耐火性能
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。

Resistance of cracked concrete composite for direct fire exposure

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