| HFRP约束混凝土圆柱应力-应变关系 |
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| 引用本文： | 邓宗才,李建辉,董宏英,曹炜.HFRP约束混凝土圆柱应力-应变关系[J].北京工业大学学报,2011,37(11):1706-1712. |
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| 作者姓名： | 邓宗才 李建辉 董宏英 曹炜 |
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| 作者单位： | 北京工业大学城市与工程防灾减灾省部共建教育部重点实验室,北京,100124;北京工业大学城市与工程防灾减灾省部共建教育部重点实验室,北京,100124;北京工业大学城市与工程防灾减灾省部共建教育部重点实验室,北京,100124;北京工业大学城市与工程防灾减灾省部共建教育部重点实验室,北京,100124 |
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| 基金项目： | 国家自然科学基金项目(50678011); 北京市自然科学基金项目(8082002) |
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| 摘 要： | 试验研究了碳纤维布、芳纶纤维布、玻璃纤维布和玄武岩纤维布层间混杂约束混凝土圆柱体的应力-应变关系.结果表明,混杂纤维增强聚合物(hybrid fiber reinforced polymer,HFRP)可明显提高圆柱体的强度,尤其能显著改善其延性.对试验结果与国内外大量研究成果进行对比分析,建立了HFRP约束混凝土圆柱体的应力-应变曲线模型.该模型使用轴向、横向和体积应变来衡量约束混凝土的内部损伤,以体现HFRP变约束力对被约束混凝土微观损伤的影响,使模型简化且具有明确的物理含义;该模型采用了更能真实体现约束效应的割线模量,并引入了依赖于混凝土本身特性的割线模量软化系数进行计算.与试验曲线的比较表明,该理论模型与试验曲线吻合良好.
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| 关 键 词： | 纤维增强聚合物 混杂 混凝土柱 约束 应力-应变关系 |
Stress-strain Relationship of HFRP-confined Concrete Circular Columns |
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| DENG Zong-cai,LI Jian-hui,DONG Hong-ying,CAO Wei.Stress-strain Relationship of HFRP-confined Concrete Circular Columns[J].Journal of Beijing Polytechnic University,2011,37(11):1706-1712. |
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| Authors: | DENG Zong-cai LI Jian-hui DONG Hong-ying CAO Wei |
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| Affiliation: | DENG Zong-cai,LI Jian-hui,DONG Hong-ying,CAO Wei(The Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | Stress-strain relationships of concrete circular columns confined by interlaminated hybrid fiber sheets of carbon fiber,aramid fiber,glass fiber,and basalt fiber are experimentally researched in this paper.Results show that HFRP can evidently increase the strength of circular columns,and significantly improve the ductility.Based on the experimental data and analysis on the research production,a constitutive confinement model is developed for concrete circular columns confined with HFRP.The feature of the mo... |
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| Keywords: | fiber reinforced polymers hybrid concrete columns confinement stress-strain relations |
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