Repair of Large Scale Reinforced Concrete Framed Shear Walls with Opening

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Title: Repair of Large Scale Reinforced Concrete Framed Shear Walls with Opening

Author(s): Y. J. Chiou, Y. W. Liou, Y. L. Mo, F. P. Hsiao, M. S. Sheu, and C. T. Shih

Publication: Special Publication

Volume: 211

Issue:

Appears on pages(s): 263-292

Keywords: cyclic loading; cyclic performance; large-scale RC framed shear walls; repair

Date: 2/1/2003

Abstract:
The seismic performance of repaired reinforced concrete framed shear walls with openings is quantitatively investigated in this study. Ten large-scale repaired framed wall specimens subjected to reversed cyclic lateral loading had been tested, and a simple prediction model was proposed to analyze the test specimens. According to the failure mechanism of the prototypes, three specimens were repaired with epoxy and the other specimens were repaired by various methods, such as enlargement of the column size, additon of wing walls adjacent to the boundary columns, jacket addition to the joints of beam-column, and use of steel bracings on the wall. The experimental results show that the maximum strength of framed shear walls repaired with epoxy is close to the prototype specimen. However, their lateral displacement obviously increases and rigidity tends to be smaller. The maximum strength and energy dissipation of most other repaired specimens are greater than those of the prototype specimens, and their cyclic resistance capacities are better than those of the prototypes.