I have a situation were an existing vertical concrete beam (not a column but a pier with hydrostatic forces) that needs reinforcing. The thought is to scab on a reinforced section the will have tension reinforcement for flexture and shear reinforcement that will be tied back into the compression zone of the existing pier. My question.... does the shear flow at the interface between the two sections ( old and new) vary along the height? All the references that I have consulted gave examples for simply supported steel beams that are welded or bolted. These fasteners were designed based on the support reactions and distrubuted evenly along the interface.
Mike