Browse > Article

Seismic Retrofit of Reinforced Concrete Structures Using Steel Braces and Moment Frames  

Huynh, Chanh Trung (성균관대학교 건설환경시스템공학과)
Park, Kyoung-Hoon ((주)CH엔지니어링)
Kim, Jin-Koo (성균관대학교 건설환경시스템공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.23, no.5, 2010 , pp. 509-516 More about this Journal
Abstract
In this study a seismic retrofit scheme for the reinforced concrete moment framed structures was investigated using steel bracing and moment frames. The analysis model structure is a 3-story 3-bay moment frame structure designed only for gravity load. The stress/strain concentration in brace-RC frame connection was investigated using finite element analysis. To prevent premature joint failure, steel moment frames were placed inside of middle bay of the RC frame. Two types of braces, steel braces and buckling restrained braces(BRBs), were used for retrofit, and the ductility and the strength of the structure before and after the retrofit were compared using nonlinear static and dynamic analyses. According to the analysis results, the strength and ductility of the structure retrofitted by the moment frames and braces increased significantly. The added steel frame did not contribute significantly to the increase of lateral strength mainly because the size is relatively small.
Keywords
seismic retrofit; buckling restrained brace; reinforced concrete;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Park, R., Paulay, T (1975) Reinforced Concrete Structures, Wiley.
2 Korea Building Code (2005) Architectural Institude of Korea.
3 AISC/SEAOC (2001) Recommended Provision for Buckling-Restrained Braced Frames, Structural Engineers Association of Northern California.
4 FEMA 356 (2000) Prestandard and Commentary for the Seismic Rehabilitaion of Buildings, FEMA-356, Federal Emergency Management Agency, Washington, D.C, 2000.
5 Moehle, J.P. (2000) State of Research on Seismic Retrofit of Concrete Building Structures in the US, US-Japan Symposium and Workshop on Seismic Retrofit of Concrete Structures.
6 ABAQUS CAE (2005) General Finite Element Analysis System for Windows.
7 Midas Genw (2006) General Structure Design System for Windows.
8 Mander, J.B., Prestley, M.J.N., Park, R. (1988) Theoretical Stress-Strain Model for Confined Concrete, Journal of Structural Engineering, 113(8).
9 Tremblay, R, Degrange, D, Blouin, J. (1999) Seismic Rehabilitation of a Four-Story Building with a Stiffened Bracing System. Proceeding of the 8th Canadian Conference on Earthquake Engineering, Vancouver.