| 徐志胜,郭新伟,张炎.碳纤维布加固火灾后足尺钢筋混凝土梁的试验研究[J].火灾科学,2005,14(1):35-40. |
| 碳纤维布加固火灾后足尺钢筋混凝土梁的试验研究 |
| Experiment on using CFRP to Strengthen Full-scale Reinforced Concrete Beam after Fire |
| 投稿时间：2004-11-01 修订日期：2004-12-21 |
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| DOI：10.3969/j.issn.1004-5309.年.期.顺序 |
| 基金项目: |
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| 中文关键词: 碳纤维布 火灾 加固 足尺钢筋混凝土梁 静载试验 |
| 英文关键词:CRFP fire strengthening full-scale reinforced concrete beam static test |
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| 中文摘要: |
| 目前,对碳纤维布加固火灾后足尺钢筋混凝土结构的试验研究还不多。本文简要介绍了足尺钢筋混凝土梁火灾试验情况、火灾后梁的加固方案,然后对加固后的梁进行静载试验。试验结果表明,采用碳纤维布(CFRP)加固能显著提高梁的刚度和承载力,就刚度提高程度而言,CFRP在后期阶段贡献较大,就承载力提高程度而言,粘贴两层所提高的程度不是粘贴一层的两倍;CFRP加固后的受火梁在荷载作用下沿高度方向上混凝土的应变近似直线分布。实验结果为火灾后混凝土结构的修复加固提供了可靠的试验依据。 |
| 英文摘要: |
| The use of Carbon Fiber Reinforced Polymer (CFRP) to strengthen full-scale reinforced concrete structure subject to fire has been seldom reported. In this paper, fire test on full-scale reinforced concrete beam and strengthening plan of beam after fire are introduced briefly, and the static test results of beam strengthened by CFRP are reported. The results demonstrate that the rigidity and ultimate bearing capacity of beam can be enhanced greatly after strengthened by CFRP. As far as rigidity is concerned, CFRP makes great contribution for its increase in later stage; as far as ultimate bearing capacity is concerned, the increase degree by two sheets of CFRP is not two times of that by one sheet. The strain of concrete is shown as satisfying nearly linear distribution in height direction when beam after fire strengthened by CFRP is under load. This paper provides reliable testing proof for strengthening of concrete structures after fire. |
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