Test results of six half-scale reinforced concrete flat plates connections with an opening in the vicinity column are reported. The test specimens represent a portion slab bounded by lines contraflexure around column. tests were designed to study effect openings on punching shear behavior slab-column connections. parameters location and size openings. One specimen had no remaining five various ...

Flats slabs became a common solution for buildings because they are easy and fast to build. In the last few years, some building that constructed using flat slab system required strengthening column junction due either imperfections during design, construction or increase of design load in case change function. The strengthen methods against punching shear (column heads, drop panels) leave an o...