Browse > Article
http://dx.doi.org/10.4334/JKCI.2002.14.1.008

Assessment of Ductility for the RC Piers with Transverse Reinforcement and Application of Carbon-Fiber Red  

이영호 (고려대학교 토목공학과)
이학은 (고려대학교 토목공학과)
Publication Information
Journal of the Korea Concrete Institute / v.14, no.1, 2002 , pp. 8-15 More about this Journal
Abstract
This paper presents a study carried out for the seismic capacity in reinforced concrete(RC) piers by the confinement effect of transverse reinforcement as such a hooked-tied, welded-tied and spiral reinforcement. In order to assess the seismic capacity with transverse reinforcement, experiment리 and analytical methods were adopted. A RC column survey was conducted based on eight one-fourth scale single circular column specimens designed and tested under slow horizontal cyclic loads. Two cases were analyzed. The confinement effect of concrete by transverse reinforcement is considered not in Case 1 but in Case 2. Also, we studied the propriety of making use of the method in which a carbon fiber rod replace spiral reinforcement in RC piers. In experimental tests, a welded-tied and spiral reinforcement has a good seismic capacity, but a carbon fiber rod presents low ductility in comparison with a hooked-tied reinforcement. In an analytical study, displacement ductility is approximate to the experimental result because of considering the confinement effect of the transverse reinforcement. Even if the confinement effect of the transverse reinforcement is considered, the analytical results for ductility of the specimens with welded-tied and spiral reinforcement show an excessive underestimation of the experimental results.
Keywords
transverse reinforcement; ductility; confinement effect; carbon fiber rod;
Citations & Related Records
연도 인용수 순위
  • Reference
1 日本土木學會コンクリ-ト委員會, "阪神路淡大震災被害分析とじん性率評價式," 土木學會, 東京, 1996, pp.49-55.
2 日本道路協會, 道路橋示方書. 同解說(V耐震設計編), 日本道路協會, 東京, 1996. 12. pp. 119-133.
3 瀧本和志, 川島一彦, "基部で曲げ破壞するRC橋脚のエネルギ-吸收容量の定式化," 土木學會論文集, No. 532/V-30, 1996.2., pp.5-13.
4 Priestley, M. J., Seible, N. F., and Calvi, G. M., "Seismic Design and Retrofit of Bridges," John Wiley & Sons, New York, 1996.
5 石橋忠良, 吉野伸一, "鐵筋コンクリ-ト橋脚の地震時變形性能力に關する硏究," 日本土木學會論文集 第390號/V-8 1988, pp.57-66.
6 日本コンクリ-ト工學協會, "兵庫縣南部地震に關する耐震技術特別硏究委員會報告書," 東京, 1997.
7 MacGregor, J G., "Reutorced Concrete," Prentice-Hall, New York, 1997.
8 李泳昊, 松川繁之, 小林郞, 眞鎬降, "圓形 RC 橋脚の耐震補强に關する實驗的硏究," 日本コンクリ-ト工學協論文報告集, 第20券, 第1號, 1998, pp.557-563.