| 基于可靠度的FRP加固混凝土结构设计方法研究 |
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| 引用本文： | 吴毅彬,金国芳,瞿革.基于可靠度的FRP加固混凝土结构设计方法研究[J].土木工程学报,2012(Z1):75-80,101. |
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| 作者姓名： | 吴毅彬 金国芳 瞿革 |
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| 作者单位： | 同济大学结构工程与防灾研究所;中船第九设计研究院工程有限公司 |
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| 基金项目： | 国家自然科学基金(50621062);上海市科研计划课题(1104H105000) |
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| 摘 要： | 为进一步完善FRP加固混凝土结构的设计方法,通过对新颁布的《纤维增强复合材料工程应用技术规范》GB50608中各类FRP加固混凝土结构在不同破坏模式下的设计方法进行可靠度校核,明确现阶段设计方法所能达到的可靠度水平,并探讨规范中FRP材料分项系数的作用。在此基础上,通过引入附加抗力系数γβ修正荷载-抗力分项系数表达式,并在可靠度分析的基础上确定附加抗力系数取值。计算结果表明,附加抗力系数可较好地调整不同类型加固构件的可靠度,使加固构件满足目标可靠度的要求,且可靠度指标具有较好的一致性。
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| 关 键 词： | 纤维增强复合材料 混凝土结构 加固 可靠度 设计方法 |
The reliability-based design method of concrete structure strengthened with fiber reinforced polymer |
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| Wu Yibin,Jin Guofang,Qu Ge.The reliability-based design method of concrete structure strengthened with fiber reinforced polymer[J].China Civil Engineering Journal,2012(Z1):75-80,101. |
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| Authors: | Wu Yibin Jin Guofang Qu Ge |
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| Affiliation: | 1.Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China; 2.China Shipbuilding NDRI Engineering Co.,Ltd.,Shanghai 200063,China) |
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| Abstract: | In order to improve the calculation method of concrete structure strengthened with fiber reinforced polymer,the reliability of FRP retrofitting concrete structure in various possible failure models,which were expressed in the Technical code for infastructure application of FRP composites(GB 50608) are investigated to indentify the reliability level.And then,the influence of FRP material factor γf is also discussed.On top of this,an additional resistance factor γβ is put forward to improve load and reisitence factor expression.It is indicated that the factor γβ can assure structure to meet the requirement of target reliability and the reliability index can keep well consistency. |
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| Keywords: | fiber reinforced polymer concrete structure reinforcement reliability calculation method |
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