Wet-Mixed Shotcrete Walls to Retrofit Low Ductile RC Frames

Abstract eng:
In this study, wet-mixed sprayed concrete is used to form infill walls in low ductile reinforced concrete (RC) frames. Nearly ½ scale one bay-one story RC frames were tested under constant vertical loads acting on the columns and lateral displacement reversals. The experimental work was composed of strengthening of one undamaged and one slightly damaged low ductile RC frames by forming an infill wall using wet-mixed sprayed concrete and one bare frame for reference. The infill walls are connected only to the beams through shear studs used at two edges of the infill wall while the other two edges are distanced to the columns. The result of the tests shows that the lateral load carrying capacity of the infilled frames retrofitted by this technique is approximately one and a half times that of the bare frame. In addition to the experimental works, the effect of the gap sizes between the columns and the infill wall is being studied analytically to understand how it affects the lateral load carrying capacity of the retrofitted frame.

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