| HB-FRP加固混凝土结构的粘结滑移统一模型 |
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| 引用本文： | 张峰,徐向锋,李术才.HB-FRP加固混凝土结构的粘结滑移统一模型[J].应用数学和力学,2015,36(12):1294-1305. |
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| 作者姓名： | 张峰 徐向锋 李术才 |
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| 作者单位： | 1山东大学 岩土与结构工程研究中心,济南 250061;2山东交通学院 土木工程系, 济南 250023 |
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| 基金项目： | 国家自然科学基金青年科学基金（51108249） |
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| 摘 要： | 为了进一步简化HB-FRP(hybrid bonding FRP)加固技术的粘结滑移模型, 并基于先期研究的HB-FRP粘结滑移分区模型开展研究.在假定HB-FRP加固技术的粘结滑移统一模型表达式的基础上，推导了钢扣件部位的粘结应力分布系数.将HB-FRP加固作用分为普通FRP粘结性能和钢扣件产生的粘结性能两部分，依据能量方法，推导了FRP张拉力与滑移量的表达式.基于理论分析和数值求解，研究了界面滑移量的分布特征.基于模型试验测试结果，研究了粘结滑移统一模型中的待定系数表达式.研究结果表明:建立的HB-FRP加固混凝土结构的粘结滑移统一模型能有效预测加固界面的剥离承载力及有效粘结长度.
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| 关 键 词： | 混凝土 加固 粘结滑移统一模型 HB-FRP 剥离承载力 有效粘结长度 |
| 收稿时间： | 2015-03-25 |
A Unified Bond-Slip Model for HB-FRP Strengthened Concrete Structures |
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| Institution: | 1Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, P.R.China;2Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, P.R.China |
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| Abstract: | In order to simplify the bond-slip models for the HB-FRP strengthening technology, the expression of a unified bond-slip model for HB-FRP strengthened concrete structures was assumed based on a previously built partition bond-slip model. The distribution of bond stress was deduced. The bond force of the HB-FRP was divided into 2 parts: one from the EB-FRP and the other from the steel fasteners. The relationship between load on FRP and slip was derived based on the energy method. The interfacial slip was investigated with the theoretical and numerical methods. The undetermined coefficients in the bond-slip model were formulated based on the model test results. The research results show that, the unified bond-slip model for HB-FRP strengthened concrete structures can effectively predict the bond strength and effective bond length of HB-FRP. |
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