STUDY ON EVALUATION METHOD OF FLEXURAL STIFFNESS OF CORRODED R. C. BEAMS

Sun Bin; Niu Ditao; Wang Yingsheng

doi:10.13204/j.gyjz200802019

Volume 38 Issue 2

Dec. 2014

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Abstract

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2008 > 38(2): 68-72

Sun Bin, Niu Ditao, Wang Yingsheng. STUDY ON EVALUATION METHOD OF FLEXURAL STIFFNESS OF CORRODED R. C. BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(2): 68-72. doi: 10.13204/j.gyjz200802019

Citation:

Sun Bin, Niu Ditao, Wang Yingsheng. STUDY ON EVALUATION METHOD OF FLEXURAL STIFFNESS OF CORRODED R. C. BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(2): 68-72. doi: 10.13204/j.gyjz200802019

Sun Bin, Niu Ditao, Wang Yingsheng. STUDY ON EVALUATION METHOD OF FLEXURAL STIFFNESS OF CORRODED R. C. BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(2): 68-72. doi: 10.13204/j.gyjz200802019

Citation:

Sun Bin, Niu Ditao, Wang Yingsheng. STUDY ON EVALUATION METHOD OF FLEXURAL STIFFNESS OF CORRODED R. C. BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(2): 68-72. doi: 10.13204/j.gyjz200802019

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STUDY ON EVALUATION METHOD OF FLEXURAL STIFFNESS OF CORRODED R. C. BEAMS

doi: 10.13204/j.gyjz200802019

1.
1. China Academy of Building Research,Beijing 100013;
2.
2. Xi’an University of Architecture and Technology,Xi’an 710055

Received Date: 2007-05-14
Publish Date: 2008-02-20

Abstract

Abstract

In order to evaluate deformation capacity of corroded R. C. beams, factors affecting flexural stiffness of corroded R. C. beams are investigated, and a conclusion is reached that key factors affecting the establishment of calculation model are steel strain between cracks tending to uniformly distributed and steel strain lagging behind concrete strain for bond degrading due to steel corrosion. Throwing off conventional plane hypothesis, the section stiffness of flexural members with deteriorated bond strength is analyzed by means of stiffness analytic method. A comprehensive strain coefficient is adopted to reflect effects of both steel strain tending to uniformly distributed and lagging behind, and a calculation model of flexural stiffness of R. C. beams with corroded bars is established. By means of finite element analysis, the relationship between comprehensive strain coefficient and reduced coefficient of bond strength is built. The formula is used to analyze flexural stiffness of some tested members, and calculated results coincide with test results well.
- corroded,
- R. C. beam,
- flexural stiffness,
- evaluation,
- comprehensive strain coefficient

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References(12)

References

Ballim Y, Reid J C, Kemp A R. Deflection of RC Beams Under Simultaneous Load and Steel Corrosion. Magazine of Concrete Research,2001, 53 (3) :171-181

[2] 任宝双,钱稼茹,聂建国. 在用钢筋混凝土简支桥面梁受弯刚度估算. 工业建筑,2001,31 (1) :13-15

[3] 熊光晶,杨建中,姜　浩,等. 关于锈蚀钢筋混凝土梁刚度研究的讨论. 工业建筑,2002,32 (10) :40-41

[4] 王庆霖,池永亮,牛荻涛. 锈后无粘结钢筋混凝土梁的模拟试验与分析. 建筑结构,2001,31 (4) :51-53

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[7] 丁大钧. 钢筋混凝土构件抗裂度、裂缝和刚度. 南京:南京工学院出版社,1986

[8] Park R, Paulay T. Reinforced Concrete Structures. Wiley A. Interscience publication, 1975

[9] 滕智明. 变形钢筋粘结滑移关系的试验研究. 清华大学土木系,1984

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[12] 惠云玲,林志伸,李　荣,等. 混凝土受弯构件腐蚀前后构件性能试验研究报告. 冶金工业部建筑研究总院国家工业建筑诊断与改造工程技术研究中心. 1995

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