Browse > Article
http://dx.doi.org/10.4334/JKCI.2008.20.4.459

Analysis of Crack Width and Deflection Based on Nonlinear Bond Characteristics in Reinforced Concrete Flexural Members  

Lee, Gi-Yeol (Research and Development Center, Saman Corporation)
Kim, Woo (Dept. of Civil Engineering, Chonnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.20, no.4, 2008 , pp. 459-467 More about this Journal
Abstract
This paper describes a proposal for average crack width and immediate deflection calculation in structural concrete members. The model is mathematically derived from actual bond stressslip relationships and tension stiffening effect between reinforcement and the surrounding concrete, and the actual strains of steel and concrete are integrated respectively along the embedded length between the adjacent cracks so as to obtain the difference in the axial elongation. With these, a model for average crack width and immediate deflection in reinforced concrete flexural members are proposed utilizing difference in the axial elongation and average steel strain and moment-curvature relationship with taking account of bond characteristics. The model is applied to the test specimens available in literatures, and the crack width and deflections predicted by the proposal equation in this study are closed to the experimentally measured data compared the current code provisions.
Keywords
bond stress-slip relationships; curvature; crack width; deflection; tension stiffening effect;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Broms B. B., "Crack Width and Crack Spacing in Reinforced Concrete Members," ACI Journal, Vol. 62, No. 9, 1965, pp. 1237-1256
2 Prakhya, G. K. V. and Morley, C. T., "Tension Stiffening and Moment-Curvature Relations of Reinforced Concrete Elements," ACI Structural Journal, Vol. 87, No. 5, 1990, pp. 597-605
3 Ghali, A., "Deflection of Reinforced Concrete Members ; A Critical Review," ACI Structural Journal, Vol. 90, No. 4, 1993, pp. 364-373
4 Gergely, P. and Lutz, L. A., "Maximum Crack Width in Reinforced Concrete Flexural Members," Causes, Mechanism, and Control of Cracking in Concrete ACI Special Publication SP- 20, ACI, Michigan, 1968, pp. 87-117
5 Shunsheng, Y. and Jiakui, C., "Bond Slip and Crack Width Calculations of Tension Members," ACI Journal, Vol. 85, No. 4, 1988, pp. 414-422
6 CEB, Serviceability Models-Behavior and Modeling in Serviceability Limit States Including Repeated and Sustained Loads, Comite Euro-International Du Beton, Lausanne, Switzerland, 1997, 12 pp
7 Yannopoulos, P. J., "Variation of Concrete Crack Width Through the Concrete Cover to Reinforcement," Magazine of Concrete Research, Vol. 41, No. 147, 1989, pp. 63-68   DOI
8 Tan, K. H., Paramasivam, P., and Tan, K. C., "Instantaneous and Long-Term Deflections of Steel Fiber Reinforced Concrete Beams," ACI Structural Journal, Vol. 91, No. 4, 1994, pp. 384-393
9 Shah, S. P. and Shrikrishna, M. K., "Response of Reinforced Concrete Beams at High Strain Rates," ACI Structural Journal, Vol. 95, No. 6, 1998, pp. 705-715
10 김 우, 이기열, 정선희, "고강도콘크리트 휨부재의 처짐에 관한 연구," 대한토목학회 논문집, 22권, 3-A호, 2002, pp. 631-640
11 Alwis, W. A. M., "Trilinear Moment-Curvature Relationship for Reinforced Concrete Beams," ACI Structural Journal, Vol. 87, No. 3, 1990, pp. 276-283
12 Nilson, A. H., Darwin, D. and Dolan, C. W., Design of Concrete Structures, McGraw Hill, New York, NY, 2004, pp. 278-280
13 강영진, 오병환, "철근콘크리트 휨부재의 균열폭 및 균열간격의 결정," 대한토목학회 논문집, 5권, 4호, 1985, pp. 103-111
14 고원준, 박선규, "부착특성을 고려한 철근콘크리트 부재의 휨 균열폭 산정," 대한토목학회 논문집, 22권, 4-A호, 2002, pp. 825-835
15 한국콘크리트학회, 콘크리트구조설계기준, 한국콘크리트학회, 2007, pp. 340-348
16 CEB-FIP, CEB-FIP Model Code 1990, Comite Euro-International Du Beton, Paris, 1991, pp. 87-109
17 European Committee for Standardization, Eurocode 2-Design of Concrete Structures, European Committee for Standardization, Brussels, 2002, 130 pp
18 ACI Committee 318, Building Code Requirements for Structural Concrete and Commentary (ACI 318-08), ACI, Farmington Hill MI, 2008, pp. 135-137
19 Gilbert, R. I., "Deflection Calculation for Reinforced Concrete Structures - Why We Sometimes Get It Wrong," ACI Structural Journal, Vol. 96, No. 6, 1999, pp. 364-373
20 Fib Task Group, Bond of Reinforcement in Concrete, State-of- Art Report Bulletin 10, International Federation for Structural Concrete, Switzerland, 2000, pp. 19-33
21 Renaud, F. and Hazem, C., "Basic Model and Simplified Calculations of Deformations According to the CEB-FIP Model Code 1990," ACI Structural Journal, Vol. 91, No. 2, 1994, pp. 169-177
22 이기열, 김 우, 하태관, "비선형 부착특성에 기반한 철근 콘크리트 부재의 인장강화효과 모델," 콘크리트학회 논문집, 19권, 6호, 2007, pp. 745-754   과학기술학회마을   DOI
23 Bilal, S. H. and Mohamad, H. H., "Effect of Fiber Reinforcement on Bond Strength of Tension Lap Splices in High-Strength Concrete," ACI Structural Journal, Vol. 98, No. 5, 2001, pp. 638-647
24 Beeby, A. W., "Predicting of Crack Width in Hardened Concrete," Structural Engineer, Vol. 57A, No. 1, 1979, pp. 9-17
25 Fib, Structural Concrete-Volume 2, International Federation for Structural Concrete, Switzerland, 1999, pp. 75-91
26 Balazs, G., "Cracking Analysis Bases on Slip and Bond Stresses," ACI Materials Journal, Vol. 90, No. 4, 1993, pp. 340-348
27 Chan, H. C., Cheung, Y. K., and Huang, Y. P., "Crack Analysis of Reinforced Concrete Tension Members," ASCE Journal of Structural Engineering, Vol. 118, No. 8, 1992, pp. 2118-2131   DOI