Three 4.87 m long splice specimens were subjected to four-point loading to evaluate thedevelopment of plain steel reinforcement that may be found in historical reinforced concrete construction.All three specimens had a shear span to beam depth ratio of 3.9 and a reinforcement ratio of 0.96%. Allthree specimens failed due to loss of bond between the longitudinal reinforcement and the surroundingconcrete. A comparison with identical specimens reinforced with 25 mm nominal diameter deformed barsas reported by Idun and Darwin suggests that splice specimens reinforced with plain bars are capable ofresisting loads that are approximately 60% of those recorded for specimens reinforced with deformedbars with the same nominal diameter. This value is slightly higher than the 44% used in the CEB-FIPModel Code.
展开▼
