Experimental Study on Existing Reinforced Concrete Frames Strengthened by L-type Precast Concrete Wall Panels to Earthquake-Proof Buildings
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The purpose of this study is to investigate the behavior of existing Reinforced Concrete (RC) frames strengthened with L-type Precast Concrete (PC) wall panels under cyclic loads. The idea is to remove the brick walls with windows inside the RC frames and to strengthen the frames using L-type PC wall panels, thus transforming the existing brick infill into a strong and rigid PC infill. Herein, a technique using dowels (i.e. post-installed anchors) to fix a PC wall panel firmly to a RC frame is proposed. This technique is to anchor dowels through pre-installed holes in a PC wall panel. A total of six full-scale, one-bay, one-story RC frames were constructed and tested under reverse cyclic loading. Four L-type PC wall panels with large openings were used for strengthening the RC frames. As a result, the lateral strength, stiffness, and energy dissipation capability of the frame was greatly improved. Specifically, the more dowels that were used to fix the vertical part of a PC wall panel to an RC column and the thicker the PC wall panel, the better the seismic resistance of the frame.
Keywordsstrengthening retrofit partial infill seismic resistant technique precast concrete wall panel
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