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The purpose of this study is to investigate the shear strength of reinforced concrete beam according to beam section size and shear reinforcement ratio. A total of nine specimens were tested and designed concrete compressive strength is 24 MPa. The main variables are shear reinforcement ratio and beam section size fixed with shear span to depth ratio (a/d = 2.5), the tensile reinforcement ratio (ρ = 0.013) and width to depth ratio (h/b = 1.5). The test specimens were divided into three series of S1 (225×338 mm), S2 (270×405 mm) and S3 (315×473 mm), respectively. The experimental results show that all specimens represent diagonal tensile failure. For S*-1 specimens (d/s=0), the shear strength decreased by 33% and 46% with increasing the beam effective depth, 26% and 33% for S*-2 specimens (d/s=1.5) and 16% and 20% for S*-3 specimens (d/s=2.0) respectively. As the shear reinforcement ratio increases, the decrease range in shear strength decreases. In other words, this means that as the shear reinforcement ratio increases, the size effect of concrete decreases. In the S1 series, the shear strength increased by 39% and 41% as the shear reinforcement ratio increased, 54% and 76% in the S2 series and 66% and 100% in the S3 series, respectively. As the effective depth of beam increases, the increase range of shear strength increases. This means that the effect of shear reinforcement increases as the beam effective depth increases. As a result of comparing experimental values with theoretical values by standard equation and proposed equation, the ratio by Zsutty and Bazant´s equation is 1.30 ~ 1.36 and the ratio by KBC1 and KBC2 is 1.55~.163, respectively. Therefore, Zsutty and Bazant's proposed equation is more likely to reflect the experimental data. The current standard for shear reinforcement ratio (i.e.,  max=d/2) is expected to be somewhat relaxed because the ratio of experimental values to theoretical values was found to be 1.01 ~ 1.44 for most specimens.

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참고문헌 (26건) : 자료제공( 네이버학술정보 )

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
1 ACI Committee 318. (2014). Building Code Requirements for Structural Concrete (ACI 318-14). American Concrete Institute. 미소장
2 Architectural Institute of Korea. (2016). Korean building Code and Commentary. 미소장
3 Size Effect on Diagonal Shear Failure of Beams Without Stirrups 네이버 미소장
4 Fracturing Truss Model: Size Effect in Shear Failure of Reinforced Concrete 네이버 미소장
5 Designing Against Size Effect on Shear Strength of Reinforced Concrete Beams Without Stirrups: I. Formulation 네이버 미소장
6 CEB/FIP Model Code MC-90-“Design code”. Bulletind’Information no 213-214, Comite Euro-International du Beton, May 1993. 미소장
7 CSA. (2014). Design of Concrete Structures (CSA A23.3-14), Canadian Standards Association. 미소장
8 Effect of Concrete Strength and Minimum Stirrups on Shear Strength of Large Members 네이버 미소장
9 Shear Strength of Reinforced High-Strength Concrete Beams without Web Reinforcement 소장
10 Kim, B. P., Shin, W. C., Lee, H. K., Baek, S. M., Kim, W. S., & Kwak, Y. K. (2017). Evaluation of Shear Behavior According to Size Effect of Reinforced Concrete Beams Using Recycled Coarse Aggregates, Journal of the Architectural Institute of Korea Structure & Construction Section, 33(10), 3-11 미소장
11 Kim, J. K. (1993). The Size Effect of Concrete Structures, Magazine of the Korea Concrete Institute, 5(1), 38-53. 미소장
12 An Experimental Study on the Shear Strength of Reinforced High Strength Concrete Beams without Stirrups 소장
13 Kim, W. S., Yeo, J. D., Kang, H. K., Kwak, Y. K., &Hong, S. G. (2012). A Study on the Flexural Behavior of High Strength Reinforced Concrete Beams Using Recycled Aggregates, Journal of Architectural Institute of Korea Structure & Construction Section, 28(3), 23-30. 미소장
14 Kim, S. S., Lee, S. G., & Kim, K. S. (2019). Structural design of reinforced concrete, Munundang, p116 미소장
15 Lee, Y. J., Seo, W. M., Kim, J. K., & Park, C. K. (1997). Effect of Concrete Strength on Stirrup Effectiveness in Shear Behavior of Concrete Beams, Journal of the Korea Concrete Institute, 8(6), 173-182. 미소장
16 Lee, H. K., Gong, H. M., Baek, S. M., Kim, W. S., &Kwak, Y. K. (2017). An Experimental Study on the Size Effect of Reinforced Concrete Members with Stirrups using Recycled Coarse Aggregates, J. of Korea Society of Waste Management, 34(2), 188-198 미소장
17 Lee, Y. J., & Lee, Y. Y. (2005). An Experimental Study on the Stirrup Effectiveness in Reinforced Concrete Beams, J. of KSMI, 9(1), 205-215 미소장
18 Lee, Y. J., Choi, J. W., Park, C. K., Shin, G. Y., &Seo, W. M. (1995). An Experimental Study on the Shear Behavior of High and Low Strength Reinforced Concrete Beams with Web Reinforcement, Journal of the Korea Concrete Institute Spring Conference, 1995, 7.1 (1995) : 318-338 미소장
19 Noh, H. J., Yu, I. G., Baek, S. M., Kim, W. S., &Kwak, Y. K. (2019). A Characteristic Study on Shear Strength of Reinforced Concrete Beams according to Shear Reinforcement Ratio and Beam Section Size, Journal of the Architectural Institute of Korea Structure & Construction Section, 35(6), 111-119. 미소장
20 Minimum Transverse Reinforcement in 65 MPa Concrete Beams 네이버 미소장
21 Rios R. D., & Riera, J. D. (2004). Size effects in the analysis of reinforced concrete structures, Engineering Structures 26, 1115-1125. 미소장
22 Shin, W. C., Lee, H. K., Baek, S. M., Kim, W. S., &Kwak, Y. K. (2016). An Experimental Study on the Minimum Reinforcement Ratio of High Strength Reinforced Concrete Beams According to RCA Replacement Ratio, Journal of the Architectural Institute of Korea Structure & Construction Section, 32(10), 13-22. 미소장
23 Yu, I. G., Noh, H. J., Lee, H. G., Baek, S. M., Kim, W. S., & Kwak, Y. K. (2020). A Characteristic Study on Shear Strength of Reinforced Concrete Beams according to Longitudinal Reinforcement Ratio and Size Effect, Journal of the Architectural Institute of Korea Structure & Construction Section, 36(2), 117-126. 미소장
24 Yang, K. H., Eun, H. C., & Chung, H. S. (2002). An Experimental Study on the Size Effect of Reinforced Concrete Deep Beams, Journal of Architectural Institute of Korea Structure & Construction Section, 18(2), 19-26. 미소장
25 Diagonal Shear Failure and Size Effect in RC Beams without Web Reinforcement 네이버 미소장
26 Shear Strength Prediction for Separate Catagories of Simple Beam Tests 네이버 미소장

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