| FRP加固RC圆柱正截面受弯承载力计算（英文） |
| |
| 引用本文： | 顾冬生,吴刚,吴智深.FRP加固RC圆柱正截面受弯承载力计算（英文）[J].东南大学学报,2010,26(1):107-111. |
| |
| 作者姓名： | 顾冬生 吴刚 吴智深 |
| |
| 作者单位： | 江南大学环境与土木工程学院;东南大学混凝土及预应力混凝土结构教育部重点实验室; |
| |
| 基金项目： | The National Basic Research Program of China (973 Program)(No.2007CB714200);;the National Natural Science Foundationof China (No.50608015,50908102) |
| |
| 摘 要： | 运用数值计算方法对FRP加固钢筋混凝土（RC）圆柱截面特性进行计算,发现截面破坏时受压区高度主要受轴压比、FRP约束强度比和纵筋配筋特征值3个主要参数影响.根据数值计算的结果进行回归,提出了受压区对应圆心角θ的计算方法.数值计算结果显示,横向约束导致的混凝土应力提高以及纵筋屈服后的强化效应使RC柱破坏时截面受弯承载力远大于规范规定值.根据理论分析和36个大比例试件实测结果提出截面破坏时受弯承载力计算方法,计算结果与试验结果吻合很好.最后,对一个典型柱变形能力进行参数分析,研究轴压比,纵筋配筋特征值和FRP约束强度比对正截面变弯承载力的影响.结果显示FRP加固圆柱破坏时受弯承载力可以比规范规定的未加固柱受弯承载力提高50%左右.
|
| 关 键 词： | 钢筋混凝土圆柱 正截面受弯承载力 纤维增强复合材料 约束 |
Ultimate flexural strength of normal section of FRP-confined RC circular columns |
| |
| Gu Dongsheng,Wu Gang,Wu Zhishen.Ultimate flexural strength of normal section of FRP-confined RC circular columns[J].Journal of Southeast University(English Edition),2010,26(1):107-111. |
| |
| Authors: | Gu Dongsheng Wu Gang Wu Zhishen |
| |
| Institution: | 1College of Environment and Civil Engineering;Jiangnan University;Wuxi 214122;China;2Key Laboratory of Concrete and Pre-Stressed Concrete Structures of the Ministry of Education;Southeast University;Nanjing 210096;China |
| |
| Abstract: | Numerical analysis is carried out to study the sectional properties of the fiber-reinforced polymer（FRP）-confined reinforced concrete（RC）circular columns. The axial load ratio, the FRP confinement ratio and the longitudinal reinforcement characteristic value are the three main parameters that can influence the neutral axis depth when concrete compression strain reaches an ultimate value. The formula for computing the central angle θ, corresponding to the compression zone, is established according to the data regression of the numerical analysis results. The numerical analysis results demonstrate that the concrete stress enhancement from transverse confinement and strain hardening of the longitudinal reinforcement can cause a much greater flexural strength than that defined by the design code. Based on the analytical studies and the test results of 36 large scale columns, the formula to calculate the flexural strength when columns fail under seismic loading is proposed, and the calculated results agree well with the test results. Finally, parametric studies are conducted on a typical column with different axial load ratios, longitudinal reinforcement characteristic value and FRP confinement ratios. Analysis of the results shows that the calculated flexural strength can be increased by 50% compared to that of unconfined columns defined by the code. |
| |
| Keywords: | reinforced concrete(RC)circular columns flexural capacity of normal section fiber-reinforced polymer(FRP) confinement |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
