Basic Study on Reinforced Concrete Shear Walls Without Boundary Columns Retrofitted by Carbon Fiber Sheets
Tomoya Matsui, Taiki Saito, and Roy Reyna
Department of Architecture and Civil Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tenpaku, Toyohashi, Aichi 441-8580, Japan
Received:July 1, 2014Accepted:September 6, 2014Published:December 1, 2014
Keywords:seismic retrofitting, carbon fiber sheet, reinforced concrete wall, shear wall without boundary columns, static loading test
Reinforced concrete (RC) buildings in Peru use low ductility walls, with rectangular cross-sections and reinforced with wire mesh and vertical reinforcement bars at boundary ends, as structural elements. These structural elements have no columns, have small amounts of reinforcing bars and are expected to fail in a brittle manner. In this study, a performance verification test is conducted on the use of carbon fiber sheets (CFS) as a retrofitting method for shear walls without boundary columns. The focus is on retrofitting walls that fail in flexural mode. In other words, although an increase in strength cannot be expected, CFS retrofitting can delay the concrete crushing of the shear wall base that occurs during flexural failure; and the aim is to verify this improvement in deformation performance due to CFS retrofitting. From the test, by retrofitting the RC shear wall without boundary columns with CFS, it was found that postmaximum strength deterioration was more gradual, and deformation performance was improved. And Ultimate limit deformation of specimen which was partially retrofitted at the boundary ends of the wall was larger than that of specimen which was retrofitted over the entire wall span.
Cite this article as:T. Matsui, T. Saito, and R. Reyna, “Basic Study on Reinforced Concrete Shear Walls Without Boundary Columns Retrofitted by Carbon Fiber Sheets,” J. Disaster Res., Vol.9 No.6, pp. 1008-1014, 2014.Data files:
-  C. Zavala, P. Gibu, L. Lavado, J. Taira, L. Cardenas, and L. Ceferino, “Cyclic Behavior of Low Ductility Walls Considering Perpendicular Action,” Journal of Disaster Research, Vol.8, No.2, pp. 312-319, 2013.
-  Architectural Institute of Japan, “Reconnaissance Report of The 2010 Chile Off Maule Earthquake,” 2012.
-  K. Horie, Y. Matsuzaki, H. Fukuyama, M. Iso, N. Yoshida, and N. Hayashida, “A Study on Retrofitting of Shear Wall with Continuous Fiber Sheet,” Summaries of technical papers of the AnnualMeeting, Architectural Institute of Japan, pp. 595-600, 1997 (in Japanese).
-  Japan Building Disaster Prevention Association, “2010 revised edition, Guidelines for the Earthquake-resistant Renovation Design and Construction of Existing RC and SRC Buildings Using Continuous Fiber Sheets,” 2010 (in Japanese).
-  Building Center of Japan, “2007 edition, Manual of Technical Standards Related to the Structure of Buildings,” 2007 (in Japanese).