A major part of central European infrastructure buildings was designed decades ago and has different needs strengthening. Increasing traffic volume, increasing axle loads, a growth in transport volume as well more restrictive design rules are the reasons why support regions existing bridges flat slabs often show lack punching resistance today. At University Innsbruck, system for subsequent stre...

Punching shear-reinforced flat slabs can fail in three modes: (1) inside the zone, (2) outside or (3) at maximum punching shear capacity. By using theory of structural systems reliability, this study investigates how these failure modes combined affect safety level reinforced concrete with reinforcement, and ultimately, variation partial factors. Based on DIN EN 1992-1-1 together German Nationa...

Flat slabs are less labour intensive, simplify the installation of services and can accommodate more floors within restricted heights. However, the span influencing their design is the longest and they require more steel compared to two-way slabs. Other drawbacks of flat slabs are vulnerability to punching shear failure and higher deflections. To avoid punching shear failure drop panels, column...