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http://dx.doi.org/10.5762/KAIS.2018.19.5.98

A Steel Spacing for Crack Control in RC Flexural Members with an Effective Modulus of Elastic  

Choi, Seung-Won (Department of Civil and Construction, Chosun College of Science & Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.5, 2018 , pp. 98-105 More about this Journal
Abstract
Cracks in RC members occurred as a result of material and structural factors. The crack width and a crack location are very difficult to examine. A direct crack control method and indirect crack control method to control a crack are presented in the KHBDC (LSD) and KSCDC (2012). In the KSCDC text, cracks are controlled by steel spacing indirectly under a service load. On the other hand, in the KSCDC appendix, cracks are controlled by a crack width directly under a sustained load. In particular, the loading state considered is different. On the other hand, cracks are controlled under a combination of service load and an effective elastic modulus is used in KHBDC. Therefore, in this study, an effective elastic modulus that can reflect the ratio of the sustained load and live load was applied, and a maximum steel spacing was calculated through a design crack width. A variable interpretation was carried out, and a rational crack control method was assessed. As a result, a steel spacing through the design crack width in the KSCDC was smaller than that from the design crack width in the KHBDC, which leads to a conservative design. In addition, the maximum steel spacing suggested in this study has a consistency eliminating the difference between direct crack control and indirect crack control.
Keywords
Crack; KHBDC; KSCDC; Maximum steel spacing; Effective modulus of elasticity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 S. W. Choi, W. Kim, "Indirect Crack Controling Method Affected by Variation of Material Characteristics in Reinforced Concrete Flexural Members", Journal of the Korea Concrete Institute, vol. 23, no. 1, pp. 87-98, 2011. DOI: https://doi.org/10.4334/JKCI.2011.23.1.087   DOI
2 Fib, Structural Concrete, vol. 1, pp. 193-196, 1999.
3 Korea Concrete Institute, Korea Structural Concrete Design Code 2012, pp. 84-85, 102, 299-302, 2012.
4 Korean Institute of Bridge and Structural Engineers, Korea Highway Bridge Design Code (Limit State Design), pp. 5-121-5-130, 2015.
5 Comite de Normalisation(CEN), Eurocode 2-Design of Concrete Structures, 122-131, 2002.
6 W. Kim, Limit State Design of Concrete Structures, pp. 426-440, DongHwa Technology Publishing, 2015.
7 S. W. Choi, "A Study of Crack Control with an Effective Modulus of Elastic in RC Members : Focused on Bar Diameter", Journal of Chosun College of Science & Technology, vol. 52, no. 1, pp. 33-38, 2017.
8 S. W. Choi, W. Kim, "Crack Control in Reinforced Concrete Flexural Members", Journal of the Korea Concrete Institute, vol. 23, no. 4, pp. 471-478, 2011. DOI: https://doi.org/10.4334/JKCI.2011.23.4.471   DOI