رفتار وصله در ستون هاي بتني تحت بارگذاري رفت و برگشتي

Cyclic Response of Lap Spliced Reinforced Concrete Columns

Placing column lap splice at possible nonlinear deformation locations may adversely affect the structureʹs response to strong ground motions. Localization of damage in the splice zone may change the structural response and prevent the load redistribution and development of a uniform pattern of nonlinear excursions among various members. Using laboratory.experiments, this study aims to present a model that can be used for predicting the behavior of lap spliced columns. The model is able to include the effects of longitudinal bar arrangement, bar yield stress, and the amount and spacing of transverse bars. It is shown that there is a good correlation between model and experimental results. Also, it is shown that the method of FEMA 356 to evaluate the effect of lap splice on column behavior is conservative. Finally, the results of nonlinear static and dynamic analyses of an ordinary moment resisting frame are presented. This case study indicates large damage localization due to deterioration of lap splice in column sections with nonlinear deformation