Nonlinear stress-strain behavior of RC elements exposed to fire

机译：火灾下钢筋混凝土构件的非线性应力-应变行为

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Determining the fire response of structural elements and their assemblies is a complex problem of nonlinear analysis in which the strength and the stiffness of the elements as well as the inner forces are continuously modified. To solve this problem the computer program FIRE was developed. The program was verified on the bases of the experimental investigation results available in literature. This paper describes the analytically achieved results for the fire resistance of centrically loaded RC columns. The influence of: element geometry, concrete cover thickness, steel ratio and intensity of axial force are analyzed. Four RC beams, exposed to different fire models are analyzed too, and the predicted results are compared with those experimentally achieved by other researchers.

机译：确定结构元件及其组件的火灾响应是一个非线性分析的复杂问题，在该分析中，元素的强度和刚度以及内力不断变化。为了解决这个问题，开发了计算机程序FIRE。该程序是根据文献中提供的实验研究结果进行验证的。本文描述了中心加载的RC柱耐火性的解析分析结果。分析了以下因素的影响：单元几何形状，混凝土覆盖层厚度，钢比和轴向力强度。还分析了暴露于不同火灾模型的四个RC光束，并将预测结果与其他研究人员的实验结果进行了比较。

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来源
《EUR 21431; Final Conference of Cost Action C12; 20050120-22; Innsbruck(AT)》|2005年|P.277-284|共8页
会议地点 Innsbruck(AT)
作者
M. Cvetkovska; L. Lazarov;
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作者单位

Faculty of Civil Engineering, Skopje, Macedonia;

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会议组织
原文格式 PDF
正文语种 eng
中图分类建筑结构;
关键词
temperature; fire resistance; structural response; RC columns; RC beams;

机译：温度;耐火性;结构响应; RC柱; RC梁;

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专利

1. Vector Form Intrinsic Finite Element analysis of nonlinear behavior of steel structures exposed to fire [J] . K.H. Lien, Y.J. Chiou, R.Z. Wang, Engineering Structures . 2010,第1期

机译：火灾下钢结构非线性行为的矢量形式本征有限元分析
2. Finite Element Modeling of Insulated FRP-Strengthened RC Beams Exposed to Fire [J] . Dai Jian-Guo, Gao Wan-Yang, Teng J. G. Journal of Composites for Construction . 2015,第2期

机译：承受火灾的FRP增强RC保温梁的有限元建模
3. Behavior of RC columns retrofitted with CFRP exposed to fire under axial load [J] . Lila M. Abdel-Hafez, Alaa Eldin Y. Abouelezz, Ahmed M. Hassan HBRC Journal . 2015,第1期

机译：CFRP加固的RC柱在轴向载荷下暴露于火的性能
4. Nonlinear stress-strain behavior of RC elements exposed to fire [C] . M. Cvetkovska, L. Lazarov, EUR 21431 Final Conference of Cost Action C12 . 2005

机译：暴露于火灾的RC元素的非线性应力 - 应变行为
5. NFEA modeling of RC beams having exposed longitudinal reinforcement: Effects of debonding on shear behavior. [D] . Kim, Sang-Ho. 2008

机译：NFEA模型的钢筋混凝土梁具有暴露的纵向钢筋：剥离对剪切行为的影响。
6. Extracting Concrete Thermal Characteristics from Temperature Time History of RC Column Exposed to Standard Fire [O] . Jung J. Kim, Kwang-Soo Youm, Mahmoud M. Reda Taha -1

机译：从标准火灾下钢筋混凝土柱温度时间历程中提取混凝土的热特性
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. Finite Element Method (FEM) Calculations of Stress-Strain in Behavior of Alpha-Beta Ti-Mn Alloys. Part I. Stress-Strain Relations [R] . Ankem, Margolin, H. 1980

机译：α-βTi-mn合金行为应力 - 应变的有限元计算。第一部分应力 - 应变关系

Nonlinear stress-strain behavior of RC elements exposed to fire

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