Axial Force Analysis of Carbon Fiber Sheet-strengthened Concrete Beam with End Restraint in High Temperature

刘汾涛; 吴波; 文波; 魏德敏

doi:10.13409/j.cnki.jdpme.2013.04.001

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Axial Force Analysis of Carbon Fiber Sheet-strengthened Concrete Beam with End Restraint in High Temperature

更新时间：2025-12-11

- Axial Force Analysis of Carbon Fiber Sheet-strengthened Concrete Beam with End Restraint in High Temperature
- Vol. 33, Issue 4, Pages: 361-368(2013)
- 作者机构：
- 作者简介：
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- DOI：10.13409/j.cnki.jdpme.2013.04.001
  CLC： U375.1
- Published：2013
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[1]刘汾涛,吴波,文波,魏德敏.具有端部约束的碳纤维布加固混凝土梁的高温轴力分析[J].防灾减灾工程学报,2013,33(04):361-368.

刘汾涛, 吴波, 文波, et al. Axial Force Analysis of Carbon Fiber Sheet-strengthened Concrete Beam with End Restraint in High Temperature[J]. 2013, 33(4): 361-368.
[1]刘汾涛,吴波,文波,魏德敏.具有端部约束的碳纤维布加固混凝土梁的高温轴力分析[J].防灾减灾工程学报,2013,33(04):361-368. DOI： 10.13409/j.cnki.jdpme.2013.04.001.

刘汾涛, 吴波, 文波, et al. Axial Force Analysis of Carbon Fiber Sheet-strengthened Concrete Beam with End Restraint in High Temperature[J]. 2013, 33(4): 361-368. DOI： 10.13409/j.cnki.jdpme.2013.04.001.

摘要

开展了具有端部约束的碳纤维布加固混凝土梁的高温反应分析

探讨了轴向/转动约束刚度比、梁截面尺寸、跨度、荷载比、加固量、配筋率、保护层厚度和防火涂料厚度等参数对ISO834标准升温作用下约束加固梁轴力的影响规律。在此基础上

给出了一个高温下约束加固梁的轴力实用计算方法。研究表明

随着升温时间增加

约束加固梁的轴力比总体呈现出先逐渐增大而后渐趋平缓甚至降低的趋势;防火保护（即使防火涂料厚度只有10mm）对高温下约束加固梁的梁端轴力影响显著。

Abstract

The carbon fiber sheet（CFS）-strengthened concrete beams with end restraints were chosen for high temperature response analysis

and the effects of some parameters

such as axial/rotational restraint ratio

sectional dimensions

span

load ratio

strengthening ratio

reinforcement ratio

thickness of concrete cover

and thickness of fire-proof coating etc

on axial force of the restrained RC beams exposed to ISO834 standard fire environment were analyzed.Based on the extensive simulation results

a practical calculation method for axial force in the restrained beams subjected to fire was proposed.The resuts show that:（1） for the axially-and-rotationally end restrained beams in fire

as temperature-rising time increases the axial force ratio increases gradually at first and then starts to flatten out or decreases;and（2） the axial force in the restrained beams strengthened with CFS and with fire-proof coating is quite different from that without fire-proof coating

even in the case that the thickness of the fire-proof coating is only 10 mm.

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references

具有端部约束的碳纤维布加固混凝土梁耐火性能试验研究 [J]. 吴波,林忠明. 建筑结构学报 . 2009(06)

碳纤维布抗弯加固钢筋混凝土梁的耐火性能试验 [J]. 吴波,万志军. 华南理工大学学报(自然科学版) . 2009(08)

高温下钢筋混凝土框架的内力重分布研究 [J]. 吴波,何喜洋. 土木工程学报 . 2006(09)

钢筋混凝土柱在高温下的数值模拟 [J]. 徐玉野. 建筑科学 . 2005(06)

钢筋混凝土受压构件防火性能的非线性分析 [J]. 查晓雄,钟善桐. 哈尔滨工业大学学报 . 2002(03)

碳纤维布加固混凝土梁的高温性能研究 [D]. 刘汾涛. 华南理工大学 2010

钢筋混凝土的高温性能及其计算[M]. 清华大学出版社 , 过镇海,时旭东著, 2003

Modeling of insulated CFRP-strengthened reinforced concrete T-beam exposed to fire [J] . R.A. Hawileh,M. Naser,W. Zaidan,H.A. Rasheed. Engineering Structures . 2009 (12)

Failure modes of reinforced concrete beams strengthened with carbon fiber sheet in fire [J] . Fentao Liu,Bo Wu,Demin Wei. Fire Safety Journal . 2009 (7)

Residual Behavior of Fire-Exposed Reinforced Concrete Beams Prestrengthened in Flexure with Fiber-Reinforced Polymer Sheets [J] . E. U. Chowdhury,L. A. Bisby,M. F. Green,V. K. Kodur. Journal of Composites for Construction . 2008 (1)

Performance in Fire of Small-Scale CFRP Strengthened Concrete Beams [J] . Richard Barnes,James Fidell. Journal of Composites for Construction . 2006 (6)

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