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This research proposes a study of the coefficient of subgrade reaction (kv) variation in slabs on ground design. Different values for coefficient of subgrade reaction (kv) were obtained through Slow Maintained Load Test (SML) and adapted for the foundation’s geometry and type of soil by methodologies such as Velloso and Lopes (2011), American Concrete Institute (1988), Terzaghi and Peck (1948), Terzaghi (1955), American Concrete Institute (1995) and Moraes (1976). The plate load test was performed in a military area of Santa Maria, RS, whose soil is stratified, evidencing sandy loam and inorganic silt. The chosen structure for analysis was a reinforced concrete building, formed by four floors and its loads were obtained accordingly to the NBR 6118/2014. The foundation system was a slab on ground. The structure, footing and soil were simulated using a computational tool and the variables were the thickness of the slab on ground and the kv. It was extracted results for vertical displacements of each pilar and foundation and was realized that as the kv and thickness of the slab foundation increase, the settlement reduces in general. Even though the values for kv obtained were fairly different, all displacements were considered acceptable by Terzaghi and Peck (1948), Skempton and Mac Donald (1956).
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