FRP-PVC管混凝土受弯构件力学性能研究

巫文君; 林泉; 姜绍飞

doi:10.6052/j.issn.1000-4750.2014.05.S001

FRP-PVC管混凝土受弯构件力学性能研究

福州大学土木工程学院,福州 350108

基金项目: 福建省杰出青年基金项目(2009 J06027); 国家十二五科技支撑计划项目(2012BAJ14B05)

详细信息

作者简介:
巫文君(1984―),女,福建宁化人,博士生,主要从事建筑抗震与结构控制研究(E-mail: 190521698@qq.com); 林泉(1989―),男,福建连江人,助理工程师,工学硕士,主要从事组合结构、抗震评价与修复加固研究(E-mail: 594483249@qq.com).

通讯作者:
姜绍飞(1969―),男,山东青岛人,教授,工学博士,博导,主要从事组合结构与健康监测研究(E-mail: cejsf@fzu.edu.cn).

中图分类号: TU398.9
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出版历程
- 收稿日期: 2014-05-04
- 修回日期: 2015-03-29
- 刊出日期: 2015-06-24

STUDY ON THE BEHAVIOR OF CONCRETE-FILLED FRP-PVC TUBULAR FLEXURAL MEMBERS

College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

摘要

摘要: 为了揭示FRP-PVC管混凝土受弯构件的力学性能,该文进行了6根试件的弯曲试验,并编写了有限元分析程序,在验证有限元分析结果正确的基础上,研究了FRP包裹层数、FRP包裹类型和FRP包裹方式对FRP-PVC管混凝土受弯性能如破坏模式、极限弯矩承载力及应力-应变关系的影响。通过分析其工作机理,得出简化的极限承载力公式。研究表明受弯构件的受力过程分为弹性阶段、弹塑性阶段和破坏阶段3个阶段;与同条件下无FRP包裹的PVC管混凝土相比,承载力随FRP体积率增大而增大、随混凝土强度提高而增大;相同FRP体积含量下CFRP与BFRP包裹方式相比,在承载力和延性上有很大的提高。
- FRP-PVC管 /
- 纯弯 /
- 本构关系 /
- 有限元 /
- 公式
Abstract: To explore the behavior of concrete-filled FRP-PCV tubular flexural members, a total of six specimens were tested and a procedure code was developed for the finite element analysis. Furthermore, a comparison was made between the simulation and experimental results. On the basis of verifying simulation results against experimental results, the main parameters varied in the tests were the layers of FRP, types, and patterns. The effect of the varying parameters on the flexural behaviors was investigated, such as the failure modes, ultimate bending capacity, and stress-strain relation curves. Additionally, the working principle was studied, and a simplified formula was presented to compute the ultimate bending moment capacity. The results show that the external confinement of concrete specimens by FRP-PVC tubes results in enhancing the ultimate bending strength and ultimate deformation, that the ultimate bending capacity increases with the FRP layers, and that the confining effect in CFRP is better than that in BFRP, which brings about the remarkable rise in bearing capacity and ductility.
- FRP-PVC tubes /
- flexural loading /
- constitutive relation /
- finite element /
- formula

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参考文献(13)

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