| 采用CFRP覆层修复的钢管混凝土梁柱的抗火性能 |
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| 摘 要： | 介绍了通过单向碳纤维聚合物加固的钢管混凝土梁柱在高温下的试验结果。为研究CFRP材料的加固作用,对所有圆形和方形的构件进行了测试。试验结果表明,通过CFRP加固后CFST梁柱的承载能力有所提高,但CFRP对其强度的影响却不明显。当偏心率或长细比增加时,CFRP所带来的强度的增幅会减少。当结构处于最大载荷时,除了那些在中间部位没有CFRP覆层的轴向受力短柱外,构件延性也有所增强。但是由于长期暴露在火中,所有修复过的构件都不能完全恢复到以前的性能。试验结果表明,当修复火灾中严重受损的CFST构件为长细构件或者遭受相对较大弯矩的构件时,建议适当考虑其他修复方法。
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| 关 键 词： | 钢管混凝土(CFST) 梁柱 高温 FRP 火灾后 残余强度 修复 |
Behaviour of Fire-Exposed Concrete-Filled Steel Tubular Beam Columns Repaired With CFRP Wraps |
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| Zhong Tao , Lin-Hai Han. Behaviour of Fire-Exposed Concrete-Filled Steel Tubular Beam Columns Repaired With CFRP Wraps[J]. Steel Construction, 2008, 0(4) |
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| Authors: | Zhong Tao Lin-Hai Han |
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| Abstract: | This paper presents the test results of fire-exposed concrete-filled steel tubular (CFST) beam columns repaired by unidirectional carbon fibre reinforced polymer (CFRP) composites. Both circular and square specimens were tested to investigate the repair effects of CFRP composites on them. The test results showed that the load-bearing capacity of the fire-exposed CFST beam columns was enhanced by the CFRP jackets to some extent, while the influence of CFRP repair on stiffness was not apparent. The strength e... |
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| Keywords: | Concrete-filled steel tubes (CFST) Beam columns Fire-exposed FRP Post-fire Residual strength Repair |
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