FIRE RESISTANCE OF CIRCULAR STEEL TUBES INFILLED WITH ULTRA-HIGH STRENGTH CONCRETE WITH EXTERNAL FIRE PROTECTION

Xiao Lyu; Erfeng Du; Ran Li

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FIRE RESISTANCE OF CIRCULAR STEEL TUBES INFILLED WITH ULTRA-HIGH STRENGTH CONCRETE WITH EXTERNAL FIRE PROTECTION

机译：圆形钢管的耐火耐火，外部防火用超高强度混凝土渗透

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In this paper, a non-linear three-dimensional finite element model is presented in order to study the behaviour of axially loaded ultra-high strength concrete filled circular hollow tubular columns exposed to fire. Ultra-high strength concrete with compressive strength greater than 180 N/mm2 has been developed for concrete filled tubes for use in high-rise buildings. This paper studies the structural performance of fire protected ultra-high strength concrete filled tubular columns exposed to the standard ISO fire. The aim of this work is to understand and represent the behaviour of axially loaded ultra-high strength concrete filled circular hollow tubular columns in fire situations and to compare calculation results with experiment. The numerical analyses are carried out using a general finite element analysis package ABAQUS and the results are validated against the test results in terms of heat distribution and mechanical behavior. Comparison with the test results showed a reasonable agreement with finite element results in terms of temperature prediction and load displacement behavior during the fire.

机译：本文提出了一种非线性三维有限元模型，以研究轴向装载的超高强度混凝土填充圆形中空管柱暴露于火灾的行为。对于用于高层建筑的混凝土填充管，已经开发出大于180N / mm2的电压强度大于180n / mm2的超高强度混凝土。本文研究了火灾保护的超高强度混凝土填充管状柱的结构性能，暴露于标准ISO火灾。这项工作的目的是理解并代表轴向装载的超高强度混凝土填充圆形空心管柱在火灾情况下的行为，并通过实验比较计算结果。数值分析使用一般有限元分析封装ABAQUS进行，并且在热量分布和机械行为方面验证了结果。与测试结果的比较表明，在火灾期间，与温度预测和负载位移行为方面的有限元件的合理协议。

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来源
《Engineering Review》 |2019年第1期|共10页
作者
Xiao Lyu; Erfeng Du; Ran Li;
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作者单位

School of Civil Engineering Shandong Jianzhu University Jinan 250101 China;

School of Civil Engineering Southeast University Nanjing 210096 China;

School of Civil Engineering Southeast University Nanjing 210096 China;

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原文格式 PDF
正文语种 eng
中图分类冶金工业;
关键词
Finite element analysis; Fire protection; Fire resistance; Circular steel tube; Ultra-high strength concrete;

机译：有限元分析;防火;耐火;圆形钢管;超高强度混凝土;

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专利

1. FIRE RESISTANCE OF CIRCULAR STEEL TUBES INFILLED WITH ULTRA-HIGH STRENGTH CONCRETE WITH EXTERNAL FIRE PROTECTION [J] . Xiao Lyu, Erfeng Du, Ran Li Engineering Review . 2019,第1期

机译：圆形钢管的耐火耐火，外部防火用超高强度混凝土渗透
2. FIRE RESISTANCE OF STEEL TUBULAR COLUMNS INFILLED WITH ULTRA-HIGH STRENGTH CONCRETE [J] . Lyu X., Shu G. P., Liew J. Y. Richard, Advanced Steel Construction: An International Journal . 2018,第3期

机译：超高强混凝土灌注钢管柱的耐火性能
3. Fire resistance of high-strength steel tubes infilled with ultra-high-strength concrete under compression [J] . Xiong Ming-Xiang, Liew J. Y. Richard Journal of Constructional Steel Research . 2021,第Jana期

机译：压缩下超高强度混凝土渗入高强度钢管的耐火性
4. FIRE RESISTANCE OF REINFORCED CONCRETE-FILLED STEEL TUBE WITH SQUARE SECTION UNDER THREE-SIDE FIRE [C] . Xue-Tao Lv, Yu-Zhuo Zhang, Wei-Wei Wang State Key Laboratory of Disaster Reduction in Civil Engineering;Tongji University;AkzoNobel Protective Coatings China;International Conference on Structures in Fire . 2014

机译：三边火灾下带方形截面的钢筋混凝土钢管的耐火性
5. Reduction in fire resistance of steel beams caused by partial fire protection loss. [D] . Kang, Yu. 2006

机译：由于部分防火损失而导致钢梁的耐火性降低。
6. Interfacial Bond Behavior of High Strength Concrete Filled Steel Tube after Exposure to Elevated Temperatures and Cooled by Fire Hydrant [O] . Zongping Chen, Jiyu Tang, Xingyu Zhou, 2020

机译：高温和消防栓冷却后高强度钢管混凝土的界面粘结行为
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. Tests on Circular Thin-Walled Steel Tubes Filled with Medium and High StrengthConcrete [R] . O'Shea, M. D., Bridge, R. Q. 1997

机译：中高强混凝土圆形薄壁钢管的试验研究

FIRE RESISTANCE OF CIRCULAR STEEL TUBES INFILLED WITH ULTRA-HIGH STRENGTH CONCRETE WITH EXTERNAL FIRE PROTECTION

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