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http://dx.doi.org/10.11112/jksmi.2022.26.6.256

Shear Capacity of the RC T Beams Strengthened for Shear with NSM FRP Strips  

Seo, Soo-Yeon (Department of Architectural Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.26, no.6, 2022 , pp. 256-262 More about this Journal
Abstract
The purpose of this study is to define the shear reinforcing effect of Near-Surface-Mounted (NSM) FRP strips in reinforced concrete (RC) member through a test. Three T shaped RC beams were made and two of them were strengthened with NSM FRP strips for increase shear strength. And those were tested to find the shear strengthening effect. In the test, two case of shear strengthening methods were considered such as 1) with NSM FRP strips having full embedded length and 2) with NSM FRP strips having some what short embedded length and additional externally bonded FRP sheet. As a result, the shear strengthening effect could be obtained when the NSM FRP strips are embedded to have full length up to the bottom of slab. However the shear strength was not increased in the case of having somewhat short embedded length of NSM FRP strips even additional EB sheet was enhanced.
Keywords
Near-Surface-Mounted (NSM); Externally Bonded (EB); Shear strengthening; Embedded length; Strengthening effect;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 ACI Committee 440-2R (2017), Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, American Concrete Institute.
2 Hong, K., Lee, S., Han, S., and Kang, P. (2018), Long-term Flexural Behavior of RC Beams Strengthened in Flexure with NSM Fe-SMA Strips, Journal of the Korea Institute for Structural Maintenance and Inspection, 22(3), 103-110.   DOI
3 Ministry of Land, Infrastructure and Transport. (2021), Design code for Shear and Torsion of Concrte Structure, KDS 14 20 22.
4 Seo, S. (2012), Bond Strength of Near Surface-Mounted FRP Plate in RC Member, Journal of the Korea Concrete Institute, 24(4), 415-422.   DOI
5 Seo, S. Choi, K., and Kwon, Y. (2012), Retrofit Capacity of Near-Surface-Mounted RC Beam by using FRP Plate, Journal of the Korea Institute for Structural Maintenance and Inspection, 16(1), 18-26.   DOI
6 Seo, S., Feo, L., and Hui D. (2013b), Bond Strength of Near-Surface-Mounted FRP Plate for Retrofit of Concrete Structures, Composite Structures, 95, 719-727.   DOI
7 Seo, S., Lee, M., and Feo, L. (2016), Flexural Analysis of RC Beam Strengthened by Partially De-bonded NSM FRP Strip, Composite Part B, 101(15), 21-30.   DOI
8 Lee, B. (2014), Analysis of Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strip for Flexure, Chungbuk National University.
9 Choi, J., Kim, M., Kim, H., and Lee, Y. (2013), Shear Strengthening Effect of Reinforced Concrete Beam Strengthened with CFRP Plate, Journal of the Architectural Institute of Korea, 24(4), 15-22.
10 Han, S., Hong, K., Shin, B. Lin, J., and Kwak, S. (2011), Characteristics of Shear Behavior of Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips, Journal of the Korea Institute for Structural Maintenance and Inspection, 15(5), 178-189.   DOI
11 Lee, H. Lee, C., Kwon, W., Kim, W., Baek, S., and Kwak, Y. (2008), Shear Strengthening Effect of Reinforced Concrete Beam Strengthened with CFRP Plate, Journal of the Architectural Institute of Korea, 24(4), 15-22.
12 Lim, D.H., and Kwon, Y.S.. (2009). An Experimental Study on the Shear Behavior of RC Beams Strengthened with Near Surface Mounted and Externally Bonded CFRP Strips, Journal of the Korea Concrete Institute, 21(3), 337-345.   DOI
13 Kim, S. (2015), CFRP-bar NSM system of reinforced concrete members Study on Bonding and Flexural Behavior, Yeungnam University.
14 Seo, S., and Kim, M. (2013), Bond Strength of Near Surface-Mounted FRP Plate in Concrete Corresponding to Space and Bond Length, Journal of the Korea Concrete Institute, 25(1), 37-43.   DOI