|Table of Contents|

Flexural design of concrete beams reinforced with BFRP bars based on deflection control approach(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年06期
Page:
61-67
Research Field:
Publishing date:
2010-12-20

Info

Title:
Flexural design of concrete beams reinforced with BFRP bars based on deflection control approach
Author(s):
LI Bing-hong1;  JIANG Shi-yong2;  FEI Wei1
1. Department of Military Civil Engineering, Logistical Engineering University, Chongqing 401311, China; 2. Department of Training, Logistical Engineering University, Chongqing 401311, China
Keywords:
structure engineering;  BFRP bars;  concrete beams;  deflection control;  flexural design
PACS:
TU377
DOI:
-
Abstract:
The unique mechanical properties of FRP bars has made the flexural design of FRP-reinforced concrete beams generally controlled by serviceability, which makes the limit states design approach modified as that the reinforcement design is carried out according to serviceability criteria, and then the reinforcements are checked by ultimate strength theory while applied to FRP-reinforced concrete beams. Based on the above design principles, the deflection control approach was adopted, and a flexural design method which defines the minimum amounts of FRP reinforcement according to the limitation values of deflections was proposed based on the equilibrium of forces and strain compatibility and nonlinear full-range analysis of load-deflection, and computer models as well as a graphical user interface(GUI)were prepared. Two BFRP-reinforced concrete beams were designed using this approach, the deflections of the two beams under service loads were calculated by finite elements analysis, which were compared with the deflection calculation results of nonlinear full-range analysis and simplified deflection formula. The deflections of the two designed beams are both lower than the limitation value, which shows that the flexural design approach is applicable. The analysis shows that BFRP-reinforced concrete beams should be over-reinforced to satisfy serviceability criteria, the deflections of BFRP-reinforced concrete beams would be greatly decreased while a higher reinforcement ratio of BFRP bars was offered. 4 tabs, 9 figs, 21 refs.

References:

[1] ACI 440.1R—03,Guide for the design and construction of concrete reinforced with FRP bars[S].
[2]ACI 440.4R—04,Prestressing concrete structures with FRP tendons[S].
[3]吕志涛.高性能材料FRP应用与结构工程创新[J].建筑科学与工程学报,2005,22(1):1-5. LU Zhi-tao.Application of high performance FRP and innovations of structure engineering[J].Journal of Architecture and Civil Engineering,2005,22(1):1-5.
[4]张 鹏,薛伟辰,李 冰,等.FRP筋混凝土梁变形计算与控制研究[J].广西工学院学报,2006,17(4):69-71. ZHANG Peng,XUE Wei-chen,LI Bing,et al.The research on deflection calculation and control of concrete beam reinforced with FRP bars[J].Journal of Guangxi University of Technology,2006,17(4):69-71.
[5]Raffaello F,Andrea P,Gaetano M.Assessment of Eurocode-like design equations for the shear capacity of FRP RC members[J].Composites,2008,39:792-806.
[6]Nanni A.North American design guidelines for concrete reinforcement and strengthening using FRP:principles,applications and unresolved issues[J].Construction and Building Materials,2003(17):439-446.
[7]李炳宏,江世永,飞 渭,等.玄武岩纤维增强塑料筋混凝土梁受弯性能研究[J].中国塑料,2009,23(7):69-72. LI Bing-hong,JIANG Shi-yong,FEI Wei,et al.Study on flexural behavior of concrete beams reinforced with BFRP bars[J].China Plastics,2009,23(7):69-72.
[8]Tegola A L.Actions for verification of RC structures with FRP bars[J].Journal of Composites for Construction,1998,2(3):145-148.
[9]Almusallam T H.Analytical prediction of flexural behavior of concrete beams reinforced by fiber reinforced polymer(FRP)bars[J].Journal of Composites for Materials,1997,31(7):640-657.
[10]方 志,李红芳,彭 波.体外CFRP预应力筋混凝土梁的受力性能[J].中国公路学报,2008,21(3):40-47. FANG Zhi,LI Hong-fang,PENG Bo.Mechanical behaviors of concrete bearn of external prestressed CFRP tendons[J].China Journa1 of Highway and Transport,2008,21(3):40-47.
[11]Toutanji H A,Saafi M.Flexural behavior of concrete beams reinforced with glass fiber reinforced polymer(GFRP)bars[J].ACI Structural Journal,2000,97(5):712-719.
[12]Faza S S,Ganga H V S.Theoretical and experimental correlation of behavior of concrete beams reinforced with fiber reinforced plastic rebars fiber-reinforced plastic reinforcement for concrete structures[J].Special Publication,American Concrete Institute,1993,138:599-614.
[13]ACI 318—08,Building code requirements for structural concrete(ACI 318—08)and commentary[S].
[14]高丹盈,李趁趁,朱海堂.纤维增强塑料筋混凝土梁荷载挠度曲线的简化计算方法[C]//岳清瑞.第二届全国土木工程用纤维增强复合材料(FRP)应用技术学术交流会论文集.北京:清华大学出版社,2002:306-310.
[15]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1997.
[16]张玉成,徐德新.新型FRP筋混凝土受弯梁正截面承载力设计[J].建筑技术开发,2004,31(10):8-10. ZHANG Yu-cheng,XU De-xin.Design process of front sectional bearing capacity of concrete beams in bending reinforced with FRP bars[J].Building Technique Development,2004,31(10):8-10.
[17]陈凤山,赵国藩,王兆忠.CFRP加固损伤钢筋混凝土梁的性能试验[J].建筑科学与工程学报,2008,25(4):116-122. CHEN Feng-shan,ZHAO Guo-fan,WANG Zhao-zhong.Test on performance of damaged RC beams strengthened with CFRP[J].Journal of Architecture and Civil Engineering,2008,25(4):116-122.
[18]黄奕辉,王全凤.FRP加固砖砌体的抗剪承载力研究[J].建筑科学与工程学报,2009,26(1):12-17. HUANG Yi-hui,WANG Quan-feng.Research on shear capacity for brick masonry strengthened by FRP[J].Journal of Architecture and Civil Engineering, 2009,26(1):12-17.
[19]薛伟辰,钱 卫.部分预应力CFRP筋混凝土梁疲劳性能研究[J].中国公路学报,2008,21(2):43-48. XUE Wei-chen,QIAN Wei.Study of fatigue behaviors of partially prestressed concrete beams with CFRP tendons[J].China Journa1 of Highway and Transport,2008,21(2):43-48.
[20]张海霞,朱浮声,李 纯.FRP筋混凝土梁正截面极限抗弯承载力的性能研究[J].混凝土,2005(12):14-17. ZHANG Hai-xia,ZHU Fu-sheng,LI Chun.Calculation method and ultimate flexural capacity of concrete beams reinforced with FRP rods[J].Concrete,2005(12):14-17.
[21]GB 50010—2002,混凝土结构设计规范[S].

Memo

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Last Update: 2010-12-20