| 施加预应力阶段CFRP布加固组合梁界面剪应力计算 |
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| 引用本文： | 霍君华,王连广. 施加预应力阶段CFRP布加固组合梁界面剪应力计算[J]. 东北大学学报(自然科学版), 2009, 30(7) |
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| 作者姓名： | 霍君华 王连广 |
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| 作者单位： | 东北大学,资源与土木工程学院,辽宁,沈阳,110004 |
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| 基金项目： | 辽宁省自然科学基金，辽宁省重点实验室基金 |
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| 摘 要： | 在预应力CFRP布加固钢与混凝土组合梁过程中,CFRP布与钢的粘结力在很多情况下决定构件是否破坏.胶结层剪切模量和CFRP布弹性模量是影响粘结力的重要因素.利用弹性理论,结合预应力CFRP布加固钢与混凝土组合梁受力特征,建立了施加预应力阶段界面剪应力的计算公式.计算结果表明,加固时组合梁跨中界面剪应力最小趋于零,越靠近CFRP布端部界面剪应力增大越快,在CFRP布端部出现明显的应力集中现象;界面剪应力随胶结层剪切模量的增大而减小,随着CFRP布弹性模量和胶结层厚度的增大而增大.
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| 关 键 词： | 预应力 CFRP布 加固 剪切模量 界面剪应力 |
Interfacial Shear Stress Calculation During Reinforcing Steel-Concrete Composite Girders with Prestressed CFRP Sheets |
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| HUO Jun-hua,WANG Lian-guang. Interfacial Shear Stress Calculation During Reinforcing Steel-Concrete Composite Girders with Prestressed CFRP Sheets[J]. Journal of Northeastern University(Natural Science), 2009, 30(7) |
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| Authors: | HUO Jun-hua WANG Lian-guang |
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| Affiliation: | HUO Jun-hua,WANG Lian-guang(School of Resources & Civil Engineering,Northeastern University,Shenyang 110004,China.) |
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| Abstract: | The adhesion force between prestressed CFRP sheets and steel is mainly used to control the failed girders in many cases when reinforcing the steel-concrete composite girders with prestressed CFRP sheets.The adhesion force is mainly affected by the thickness and shear modulus of adhesive layer and elastic modulus of CFRP sheets.The calculation formulas of interfacial shear stress are therefore derived during prestressing on the basis of the theory of elasticity in combination with the loading conditions of t... |
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| Keywords: | prestress CFRP(carbon fiber reinforced polymer)sheet reinforcement shear modulus interfacial shear stress |
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