Pathological manifestations in a prestressed concrete flat slab building - a case study: part I - structure analysis.

Prestressed concrete flat slabs with unbonded tendons are widely used in Brazil due to their advantages. However, the bold achieved with the use of prestressed buildings often results in highly complex projects and non-trivial considerations in the engineer's daily work. This work aims to present a case study of a commercial building constructed in Rio Grande do Sul, consisting of prestressed concrete flat slabs with unbonded tendons, where pathological manifestations occurred even during the construction phase, such as excessive deflections, cracks in the prestressed slabs, and some partial ruptures of structural elements. The work presents the pathological manifestations at the building and the structural analysis, as well as a succinct presentation of the reinforcement techniques used.