| 基于双剪统一强度理论的FRP约束混凝土的承载力 |
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| 引用本文： | 于峰,牛荻涛. 基于双剪统一强度理论的FRP约束混凝土的承载力[J]. 哈尔滨工业大学学报, 2009, 0(12): 186-189 |
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| 作者姓名： | 于峰 牛荻涛 |
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| 作者单位： | 安徽工业大学建筑工程学院;西安建筑科技大学土木工程学院 |
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| 基金项目： | 国家自然科学基金重点资助项目(50538060);安徽省优秀青年人才基金资助项目(2009SQRZ081) |
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| 摘 要： | 外包纤维复合材料(FRP)约束混凝土,可以有效的提高混凝土的承载力和延性.本文系统总结了几种较为典型的FRP约束混凝土承载力的计算方法,通过对已有大量试验研究结果的分析,指出FRP约束混凝土的性能主要取决于FRP对混凝土的约束效果.根据双剪统一强度理论和静力平衡条件,建立了FRP约束混凝土的承载力的计算模型.该模型反映双向FRP约束混凝土的特点,主要考虑了约束效应系数、非约束混凝土的强度以及FRP材料的性能等因素对约束混凝土承载力的影响.模型计算结果与试验数据吻合较好.
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| 关 键 词： | 纤维复合材料 约束混凝土 承载力 双剪统一强度理论 |
Bearing capacity of FRP-confined concrete based on twin shear unified strength theory |
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| YU Feng,NIU Di-tao. Bearing capacity of FRP-confined concrete based on twin shear unified strength theory[J]. Journal of Harbin Institute of Technology, 2009, 0(12): 186-189 |
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| Authors: | YU Feng NIU Di-tao |
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| Affiliation: | 1.School of Construction Engineering,Anhui University of Technology,Maanshan 243002,China;2.College of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China) |
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| Abstract: | External confinement by the wrapping of fiber reinforced polymer(FRP) is an efficient technique to increase the bearing capacity and ductility of confined concrete.Several typical methods to calculate the ultimate compressive strength of FRP-confined are summarized.It can be concluded that the behavior of FRP-confined concrete is mainly related to the lateral confinement of FRP to concrete by the analysis on existing experimental results.Based on the twin shear unified strength theory and static equilibrium condition,an analytical model of bearing capacity for FRP-confined concrete is developed.The model captures the character of FRP-confined concrete,and the effects of modified confinement ratio,unconfined concrete strength and the material behavior of FRP on its bearing capacity are carefully considered.The predictions of the model agree well with test data. |
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| Keywords: | fiber reinforced polymer confined concrete bearing capacity twin shear unified strength theory |
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