EXPERIMENTAL STUDY ON FIRE PERFORMANCE OF CONCRETE BEAMS STRENGTHENED WITH CARBON FIBER SHEETS

机译：碳纤维布加固混凝土梁抗火性能的试验研究

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The results of fire tests on five reinforced concrete (RC) beams are presented in this paper, four of which were strengthened with carbon fiber sheets (CFS) and protected by passive fire insulation applied to the exterior of the CFS-strengthening system, and one of which was tested without strengthening and supplemental fire insulation. The primary objective of these tests was to investigate the failure mode, fire resistance and deformation of the strengthened beams at high temperatures, and further evaluate the effect of flexure cracks on the tension rebar temperatures during the fire tests. The experimental results show that: (a) the fire performance of the protected CFS-strengthened RC beams may be similar to, or better than, that of the unstrengthened RC beams without insulation, despite the fact that the structural effectiveness of the CFS is likely lost early in fire; and (b) the effect of flexural cracks on temperatures of tension rebars in simply-supported RC beams under fire is limited.

机译：本文介绍了五根钢筋混凝土（RC）梁的防火测试结果，其中四根采用碳纤维板（CFS）进行了加固，并通过在CFS加固系统外部应用的被动防火隔热材料进行保护，其中一根其中的测试未经加强和补充防火隔离。这些测试的主要目的是研究高温下的破坏模式，耐火性和加固梁的变形，并进一步评估挠性裂纹对耐火钢筋温度的影响。实验结果表明：（a）受保护的CFS加固的RC梁的防火性能可能类似于或优于没有绝缘的未加固的RC梁，尽管事实上CFS的结构有效性很可能失火早（b）受火时挠曲裂缝对简支钢筋混凝土梁中受拉钢筋温度的影响是有限的。

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《2009年土木工程结构创新与可持续发展国际会议（The International Symposium on Innovation Sustainability of Structures in Civil Engineering）论文集》|2009年|1644-1649|共6页
会议地点 Guangzhou(CN);Guangzhou(CN)
作者
Fen-Tao Liu; Bo Wu; De-Min Wei;
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State Key Laboratory of Subtropical Building Science South China University of Technology Guangzhou 510640 P.R. China;

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fire test; RC beam; carbon fiber sheet (CFS); fire performance;

机译：耐火测试钢筋混凝土梁;碳纤维板（CFS）;防火性能;

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专利

1. Flexural strengthening of reinforced concrete beams with carbon fibers reinforced polymer (CFRP) sheet bonded to a transition layer of high performance cement-based composite [J] . J. B. De Hanai, V. J. Ferrari Revista IBRACON de Estruturas e Materiais . 2012,第5期

机译：用碳纤维增强聚合物（CFRP）薄板粘结到高性能水泥基复合材料的过渡层上来对钢筋混凝土梁进行抗弯加固
2. Failure modes of reinforced concrete beams strengthened with carbon fiber sheet in fire [J] . Fentao Liu, Bo Wu, Demin Wei Fire Safety Journal . 2009,第7期

机译：碳纤维薄板加固钢筋混凝土梁在火灾中的破坏模式
3. Fatigue Performance of Corroded Reinforced Concrete Beams Strengthened with Carbon Fiber Reinforced Polymer Sheets [J] . Li Song, Zhiwu Yu Advanced Science Letters . 2012,第Null期

机译：碳纤维增强聚合物片增强的锈蚀钢筋混凝土梁的疲劳性能
4. EXPERIMENTAL STUDY ON FIRE PERFORMANCE OF CONCRETE BEAMS STRENGTHENED WITH CARBON FIBER SHEETS [C] . International symposium on innovation sustainability of structures in civil engineering . 2009

机译：碳纤维板加固混凝土梁火力性能的实验研究
5. Performance in fire of reinforced concrete T-beams strengthened with externally bonded fibre-reinforced polymer sheets. [D] . Chowdhury, Ershad Ullah. 2005

机译：外部粘结的纤维增强聚合物板增强了钢筋混凝土T型梁的耐火性能。
6. Experimental Study of the Effect of High Service Temperature on the Flexural Performance of Near-Surface Mounted (NSM) Carbon Fiber-Reinforced Polymer (CFRP)-Strengthened Concrete Beams [O] . Younes Jahani, Marta Baena, Javier Gómez, 2021

机译：高服务温度对近表面（NSM）碳纤维增强聚合物（CFRP） - 复制混凝土梁弯曲性能影响的实验研究
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。

EXPERIMENTAL STUDY ON FIRE PERFORMANCE OF CONCRETE BEAMS STRENGTHENED WITH CARBON FIBER SHEETS

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