| 预应力FRP片材约束混凝土方柱应力-应变模型 |
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| 引用本文： | 周长东,张蝶.预应力FRP片材约束混凝土方柱应力-应变模型[J].结构工程师,2010,26(2). |
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| 作者姓名： | 周长东 张蝶 |
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| 作者单位： | 1. 北京交通大学土木建筑工程学院,北京,100044;同济大学土木工程防灾国家重点实验室,上海,200092
2. 北京交通大学土木建筑工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金，同济大学土木工程防灾国家重点实验室开放基金资助项目 |
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| 摘 要： | 采用预应力FRP片材加固混凝土柱是一种新型加固方法,能够避免FRP片材的应变滞后,加强FRP片材与混凝土之间的协同工作,提高FRP片材的加固效率,改善被加固柱的受力性能.基于已有的FRP片材约束混凝土方柱的应力应变模型,考虑预应力FRP片材对混凝土柱的主动约束作用,提出了一种预应力FRP片材约束混凝土方柱的应力-应变关系模型.模型的计算分析结果表明,预应力FRP片材的主动约束可以显著提高混凝土方柱的延性和抗压承载力,和既有结果比较一致.
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| 关 键 词： | 预应力纤维复合材料 约束混凝土 应力-应变关系 延性 |
Modeling on Stress-Strain Relationship of Square RC Columns Confined with Lateral Pre-Tensioned FRP Sheets |
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| ZHOU Changdong,ZHANG Die.Modeling on Stress-Strain Relationship of Square RC Columns Confined with Lateral Pre-Tensioned FRP Sheets[J].Structural Engineers,2010,26(2). |
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| Authors: | ZHOU Changdong ZHANG Die |
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| Affiliation: | ZHOU Changdong1,2,ZHANG Die1(1.School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China,2.State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China) |
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| Abstract: | The concrete column strengthening technology with prestressed FRP sheets is new strengthening technology.By using this technology,strain hysteresis of FRP sheets can be avoided;the cooperative working performance of concrete and FRP sheets,the availability of FRP sheets and the mechanical property of concrete columns can be improved significantly.Based on the existing stress-strain models of FRP confined concrete square columns,a new stress-strain model of concrete square columns confined with pre-tensioned... |
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| Keywords: | pre-tensioned FRP confined concrete stress-strain relationship ductility |
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