A Case Study of Shoring and Column Failures of a Flat Plate Reinforced Concrete Structure

A shoring failure occurred while relocating a reinforced concrete column and footing supporting a structural roof system during a building renovation project. The steel shoring posts buckled, the roof slab structure exhibited significant cracking and vertical deflection. An initial condition assessment was performed to evaluate the stability and integrity of the existing structure and a more detailed assessment followed to assess the damage, examine the as-built condition of the structure, and develop the repair design. Visual observations, as-built field measurements, and non-destructive testing were performed to evaluate the condition of the structure and calculate the load capacity of the system. A series of finite element structural analyses were performed to investigate the structural behavior during the failure and to develop the repair design to remediate the damaged structure.