The effect of cyclic loads on bond
Ismail, Mohamed Abdel-Fattah
Jirsa, James O.
Master of Science
The purpose of this investigation was to study the effect of load history on the behavior of axially reinforced concrete prisms. The six test specimens were divided into three pairs in which one specimen was tested under repeated tension, and the other under repeated tension and compression loading. A test apparatus was designed to enable the use of a standard hydraulic testing machine to apply the tension and compression loads; The strain along the bar and the total deformation of the specimens were continuously recorded. The main factors studied were the effect of the peak stress level, the effect of repeated cycles and the effect of repeated tension loads versus repeated tension and compression loads. The strain distribution, the bond stresses, the residual and total elongations, the crack width and the stiffness of the concrete prism were the main items discussed.