| 圆CFRP-钢管混凝土压弯构件滞回性能试验研究 |
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| 引用本文： | 车媛,王庆利,邵永波,侯婷婷. 圆CFRP-钢管混凝土压弯构件滞回性能试验研究[J]. 土木工程学报, 2011, 0(7) |
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| 作者姓名： | 车媛 王庆利 邵永波 侯婷婷 |
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| 作者单位： | 大连理工大学;沈阳建筑大学;烟台大学; |
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| 基金项目： | 教育部新世纪优秀人才支持计划(NCET-08-0865); 辽宁省高等学校优秀人才支持计划(2007R31) |
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| 摘 要： | 进行了12个圆CFRP-钢管混凝土压弯构件的滞回性能试验研究。试验结果表明,CFRP对圆钢管混凝土有很好的环向约束和纵向增强作用,钢管的局部屈曲得到了延缓或消除。所有试件的跨中荷载-挠度曲线和弯矩-曲率曲线均较为饱满,表现出很好的滞回性能。在加载后期,无轴压力试件的承载力无下降,而有轴压力试件的承载力明显下降。对试验结果的分析表明,钢管和CFRP在纵向和环向都可以协同工作;同一点的纵向应变和环向应变异号;试件的挠曲线均近似为正弦半波曲线。计算表明,强度退化不显著,轴压比和纵向CFRP增强系数的增大可以提高试件的抗弯承载力和刚度,同时减缓刚度退化,但会降低试件的延性和累积耗能,而轴压比在一定范围内对试件的抗震性能是有利的。
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| 关 键 词： | 圆CFRP-钢管 内填混凝土 压弯构件 滞回性能 |
Experimental study on hysteretic behaviors of concrete filled circular CFRP-steel tubular beam-columns |
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| Che Yuan, Wang Qingli Shao Yongbo Hou Tingting. Experimental study on hysteretic behaviors of concrete filled circular CFRP-steel tubular beam-columns[J]. China Civil Engineering Journal, 2011, 0(7) |
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| Authors: | Che Yuan Wang Qingli Shao Yongbo Hou Tingting |
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| Affiliation: | Che Yuan1,2 Wang Qingli2 Shao Yongbo3 Hou Tingting2(1.Dalian University of Technology,Dalian 116024,China,2.Shenyang Jianzhu University,Shenyang 110168,3.Yantai University,Yantai 264005,China) |
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| Abstract: | A total of 12 specimens were experimentally investigated to study the hysteretic behaviors of concrete filled circular CFRP-steel tubular beam-columns.The test results indicated that,CFRP can effectively provide circumferential confinement and longitudinal strengthening for the concrete filled circular steel tube,and the local bulking of the steel tube are delayed or prevented.Mid-span load-deflection hysteretic curves and moment-curvature hysteretic curves of all the specimens display perfect hysteretic be... |
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| Keywords: | circular CFRP-steel tube in-fill concrete beam-column hysteretic behavior |
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