Evaluation of Shear Behavior of Precast RC Beams According to Replacement Ratio of Ground Granulated Blast Furnace Slag

Abstract

This study evaluates the shear performance of precast beams with ground granulated blast furnace slag. A total of four specimens according to replacement ratio of ground granulated blast furnace slag. The specimens under three loading points had a shear span-to-depth ratio of 2.5, and a rectangular section with a width of 200mm and a effect depth of 300 mm. In this study, existing equations were used for predicting the shear strength of the specimens. The shear strength by existing equations was compared with those of 89 reinforced concrete beams without shear reinforcement. It can be shown from experimental results that all specimens with ground granulated blast furnace slag showed a similar shear strength as compared with the specimen with portland cements alone.

Prediction of shear strength of reinforced concrete beams without shear reinforcement considering bond action of longitudinal reinforcements

“…Figure 3 shows the shear failure distance in relation to the shear-span-to-depth ratio a / d , and the ratio of effective depth x / d is based on 44 experimental results on RC beams with shear reinforcement (Alam and Hussein, 2013; Bentz and Buckley, 2005; Choi et al, 2010; Ghannoum, 1998; Jeong et al, 2014, 2016; Kani, 1967; Sneed and Ramirez, 2010; Walraven and Lehwalter, 1994). With an increasing shear-span-to-depth ratio, x / d tends to increase.…”

“…To reflect the influence of size effect on each contribution, this study presented the size effect correction coefficient k d based on 51 previous experimental results (Ahmad et al, 1986; Alam and Hussein, 2013; Bentz and Buckley, 2005; Choi et al, 2010; Ghannoum, 1998; Jeong et al, 2014, 2016; Kani, 1967; Lee et al, 2013; Mathey and Watstein, 1963; Sneed and Ramirez, 2010; Walraven and Lehwalter, 1994). Figure 7 shows that the shear strength tends to decrease with an increasing effective depth.…”

“…Figure 12 compares the results of the experiments on x to previous experimental results based on the ratio calculated by equation (5). By applying equation (5), which is derived from the existing experimental results (Fujii and Morita, 1982; Ghannoum, 1998; Hsu, 1988; Jeong et al, 2014, 2016; Kani, 1964, 1966, 1967; Kim and White, 1991), the average shear bond failure distance and coefficient of variation were found to be 0.93% and 17.9%, respectively. This demonstrates that the proposed equation to predict x is fairly accurate and reasonable.…”