Behavior of post-installed rebar connections under seismic action

The topic of beam to column joints behavior under seismic loading has been extensively examined and discussed by many researchers and various loading protocols were implemented to test these types of specimens. However, there is a lack of information in the case of specimens reinforced with post-installed reinforcement. This study focuses on behavior of post-installed rebar connections under seismic action. In this regard, specimens which are representative of beam to column connection were designed according to Model Code (2010). To better understand the behavior of post-installed rebars, specimens reinforced with cast-in place straight and bended reinforcement were also provided based on the code. Furthermore, a new load protocol was utilized for the application of stepwise increasing cyclic load. Based on this protocol, after application of cyclic load, the specimens were unloaded and loaded monotonically till the point of failure. Graphs corresponding to time history of slip, crack width vs. time and load vs. displacement for each case is developed and the three different types of reinforcement are compared. It is concluded that post-installed rebars can be an efficient tool to retrofit the buildings as they show acceptable behavior against cyclic loading.