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Punching Shear Behavior of Flat Slab Systems - Experimental Investigations Using Isolated Specimens with Load-Dependent Boundary Conditions
The punching shear behavior of flat slabs has been mainly investigated on isolated specimens since experiments on continuous flat slab systems are expensive and complex. However, isolated specimens represent only the hogging moment area around the slab-column connection and thus neglecting system influences occurring in continuous slabs. The small test data on continuous slabs and several numerical investigations indicate a beneficial impact of system influences such as moment redistribution between sagging and hogging moment as well as compressive membrane action (CMA) on the punching shear behavior. To fill this gap of test data for deriving more advanced design provisions, a new test setup for an efficient investigation of the system behavior with isolated flat slab specimens was developed. Hereby, load-dependent edge conditions aiming to simulate the real boundary conditions of flat slab systems are applied. The required edge conditions (CMA and moment redistribution) are determined by a numerical model simulating the load-deformation behavior of an equivalent flat slab system. The test results show increased punching shear resistances coinciding with decreased deflections for the slabs with simulated system influences.
Punching Shear Behavior of Flat Slab Systems - Experimental Investigations Using Isolated Specimens with Load-Dependent Boundary Conditions
The punching shear behavior of flat slabs has been mainly investigated on isolated specimens since experiments on continuous flat slab systems are expensive and complex. However, isolated specimens represent only the hogging moment area around the slab-column connection and thus neglecting system influences occurring in continuous slabs. The small test data on continuous slabs and several numerical investigations indicate a beneficial impact of system influences such as moment redistribution between sagging and hogging moment as well as compressive membrane action (CMA) on the punching shear behavior. To fill this gap of test data for deriving more advanced design provisions, a new test setup for an efficient investigation of the system behavior with isolated flat slab specimens was developed. Hereby, load-dependent edge conditions aiming to simulate the real boundary conditions of flat slab systems are applied. The required edge conditions (CMA and moment redistribution) are determined by a numerical model simulating the load-deformation behavior of an equivalent flat slab system. The test results show increased punching shear resistances coinciding with decreased deflections for the slabs with simulated system influences.
Punching Shear Behavior of Flat Slab Systems - Experimental Investigations Using Isolated Specimens with Load-Dependent Boundary Conditions
Lecture Notes in Civil Engineering
Ilki, Alper (editor) / Çavunt, Derya (editor) / Çavunt, Yavuz Selim (editor) / Kalus, Matthias (author) / Ungermann, Jan (author) / Hegger, Josef (author)
International Symposium of the International Federation for Structural Concrete ; 2023 ; Istanbul, Türkiye
2023-06-01
11 pages
Article/Chapter (Book)
Electronic Resource
English
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