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Effect of the Size and Location of a Web Opening on the Shear Behavior of High-Strength Reinforced Concrete Deep Beams
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 Title & Authors
Effect of the Size and Location of a Web Opening on the Shear Behavior of High-Strength Reinforced Concrete Deep Beams
Yang, Keun-Hyeok; Eun, Hee-Chang; Chung, Heon-Soo;
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 Abstract
The purpose of this experimental study is to investigate the relationship of the shear behavior and the variety of width, depth and location of an opening in reinforced concrete deep beams with rectangular web openings, and to present an improved shear strength equation of those members. The main parameters considered were concrete strength(fck), shear span-to-overall depth ratio(a/h), and the size and vortical position of the web openings. Twenty five deep beams were tested under two symmetric loading-points. Test results showed that the shear behavior of deep beams with web openings was influenced by a/h and the size of opening. In addition, the KCI shear design provision is a tendency to be more unconservative according to the increase in a/h and the area-ratio of opening to shear span(Ao/Ash). Based on the concrete strut action of top and bottom member of an opening and the tie action of longitudinal reinforcement, a proper design equation which closely predicts the capacity of deep beams with rectangular openings is developed.
 Keywords
web openings;deep beam;shear span-to-overall depth ratio;strut action;tie action;shear strength;
 Language
Korean
 Cited by
1.
개구부를 갖는 철근콘크리트 연속 깊은 보의 역학적 거동,양근혁;심현주;

대한건축학회논문집:구조계, 2006. vol.22. 7, pp.27-34
2.
상계치 이론을 이용한 개구부를 갖는 철근콘크리트 단순·연속 깊은 보 내력의 수치해석 모델,양근혁;은희창;정헌수;

한국콘크리트학회논문집, 2006. vol.18. 4, pp.469-477 crossref(new window)
 References
1.
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2.
양근혁, 은희창, 정헌수, '크기효과를 고려한 철근콘크리트 깊은 보의 전단내력 예측', 대한건축학회 논문집구조계, 제17권 12호, 2001. 12, pp.35~44

3.
Ashour, A. F. and Rishi, G., 'Tests of Reinforced Concrete Continuous Deep Beams with Web Openings,' ACI Structural JournaI, Vol. 97. No.3, May-June, 2000, pp.418~426

4.
Kong, F. K. and Sharp, G. R., 'Shear Strength of Lightweight Reinforced Concrete Deep Beams with Web Openings,' The Structural Engineer, Vol.51. No. 8, Aug., 1973, pp.267-275

5.
Kong, F. K. and Sharp, G. R, 'Structural Idealizationfor Deep Beams with Web Openings,' Magazine of Concrete Research, Vol. 29. No. 99, June, 1977,pp.81~91 crossref(new window)

6.
Ray, S. P. and Reddy, C. S., 'Strength of ReinforcedDeep Beams with and without Opening in the Web,'The Indian, Concrete Journal, Vol. 53. Sept,1979, pp.242~246