An innovative approach to repairs more than doubles the life of a seemingly-doomed parking structure.
Eric VanDuyne, PE, SE, Senior Engineer, and John Vincent, PE, SE, Principal Structural Engineer, were given the opportunity to investigate deteriorated conditions in a five-level, post-tensioned concrete parking structure located in the midwest U.S. back in 1991. At that time, the structure was 15 years old and exhibited widespread deterioration to concrete surfaces on elevated levels of the garage. This deterioration included concrete delamination, concrete spalls, and exposed and corroded reinforcing bars. Because of this deterioration, traffic surfaces became riddled with potholes and stray pieces of spalled slab concrete. The deterioration was quite apparent to the casual observer, and the facility’s owner and patrons had begun questioning the ability of the structure to support vehicles.
The parking structure is still functional today, 20 years after completion of repairs. The repair decisions that were made and repair construction that was performed have more than doubled the life of the structure.