Browse > Article
http://dx.doi.org/10.4334/JKCI.2012.24.3.323

Retrofitting Effects and Structural Behavior of RC Columns Strengthened with X-Bracing Using Carbon Fiber Anchor  

Sim, Jong-Sung (Dept. of Civil & Environmental Engineering, Hanyang University)
Lee, Kang-Seok (School of Architecture, Chonnam National University)
Kwon, Hyuck-Woo (Dept. of Civil & Environmental Engineering, Hanyang University)
Kim, Hyun-Joong (Dept. of Civil & Environmental Engineering, Hanyang University)
Publication Information
Journal of the Korea Concrete Institute / v.24, no.3, 2012 , pp. 323-331 More about this Journal
Abstract
This paper presents a new strengthening method on concrete column against seismic loads for structural performance tests. An X-bracing using high performance carbon fiber threads called the "Carbon fiber anchor X-bracing system" is used to connect RC frames internally. The carbon fiber sheet is wrapped around the column to fix the top and bottom of the column after Super anchor was installed by drilling hole on the column. The structural performance was evaluated experimentally and analytically. Two types of columns specimens were made; flexure fracture scaled model and shear fracture scaled model. For the performance evaluation, cyclic loading tests were conducted on moment and shear resisting columns with and without X bracing. Test results confirmed that the bracing system installed on RC columns enhanced the strength capacity and provided adequate ductility.
Keywords
carbon fiber; carbon fiber anchor; X-bracing; RC column;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Viswanath, K. G., Prakash, K. B., and Desai, A., "Seismic Analysis of Steel Braced Reinforced Concrete Frames," International Journal of Civil and Structural Engineering, Vol. 1, No. 1, 2010, pp. 114-122.
2 Youssef, M. A., Ghaffarzadeh, H., and Nehdi, M., "Seismic Performance of RC Frames with Concentric Internal Steel Bracing," Engineering Structures, Vol. 29, Issue 7, 2007, pp. 1561-1568.   DOI   ScienceOn
3 Maheri, M. R. and Sahebi, A., "Experimental Investigation on the Use of Steel Bracing in Reinforced Concrete Frames," Proceedings of the Second International Conference on Seismic and Earthquake Engineering, Iran, 1995, pp. 775-784.
4 Maheri, M. R. and Sahebi, A., "Use of Steel Bracing in Reinforced Concrete Frames," Engineering Structures, Vol. 19, No. 12, 1997, pp. 1018-1024.   DOI   ScienceOn
5 Chang, H. Y. and Chiu, C. K., "Performance Assessment of Buckling Restrained Braces," Procedia Engineering, Vol. 14, 2011, pp. 2187-2195.   DOI   ScienceOn
6 박종섭, 박영환, 유영준, 정우태, 강재윤, "부착 또는 비부착된 탄소판으로 긴장 보강된 RC 보의 보강성능," 콘크리트학회 논문집, 17권, 1호, 2005, pp. 279-282.
7 심종성, "철근콘크리트 구조물의 보수.보강 신기술 개발," 연구보고서, R&D 94-0039, 한양대학교, 1996, pp. 17-34.
8 Jones, E. A. and Jirsa, J. O., "Seismic Strengthening of a Reinforced Concrete Frame Using Structural Steel Bracing," Report on a Research Project, National Science Foundation, 1986, pp. 63-77.
9 오홍섭, 심종성, 주민관, "탄소섬유 보강재로 표면매립에 의해 보강된 철근 콘크리트 보의 휨 보강성능," 구조물 진단학회지, 12권, 3호, 2008, pp. 84-94.   과학기술학회마을