The calculation method of punching shear bearing capacity of unbounded prestressed concrete slab is presented for the reason that traditional methods mainly depend on experiences. The concrete material is assumed as ideal rigid-plastic material. The Quasi-Coulomb Criterion is taken as the strength ...
4-5 have been used for the calculation of the ultimate punching shear stress (vu) for UHPFRC (Table 7). Table 7. Ultimate punching shear stress (vu) for UHPFRC. Slab IDd (mm)bo(mm)Vu(N)vu (MPa) S-10–1 12 333 2383 0.60 S-10–2 12 333 1685 0.42 S-10–3 12 333 2550 0.64...
After all, isn't breakout just a form of punching shear? So I checked the punching shear of the slab using the standard 2 way shear formula in ACI 318, and sure enough it passes. Can someone please explain to me why the formula for breakout results in way less capacity than the ...
Therefore, real scale fire tests are performed on flat concrete slab specimens. Building codes (e.g., Eurocode 2) provide design guidelines to resist punching failure, based on simplified design models. The last decades, significant research was performed resulting in more detailed calculation ...
The slab-column structure system has a broad future of application with the development of unbonded pre-stressed reinforced concrete technology in civil engineering.However the punching shear performance of the slab-column connection has been changed because of the use of the unbonded pre-stressed rein...
This work deals with punching shear behaviour of flat plates reinforced with glass fibre-reinforced polymers (GFRP) reinforcing bars. Six full-scale reinforced concrete (RC) slab-column interior connections were constructed and tested to failure. Two variables were investigated; the flexural reinforcement...
factor for concrete (1.5),k=1+200d≤2.0(din mm) the size effect factor of effective depth,fckthe characteristic cylinder compressive concrete strength,ρlthe flexural reinforcement ratio,vmin=0.035⋅k3/2⋅fck1/2the minimal punching shear capacity,dthe effective depth of a slab (footing)....
Punching shear strength of interior and edge column-slab connections in CFRP reinforced flat plate structures transferring shear and moment. The purpose of this investigation is to study the punching shear strength of interior and edge column-slab connections where the slabs are reinforced for flexure...
5.2. Calculation Formula Incorporating the Membrane Effect An accurate solution that addresses the conservative result of the preceding method can be obtained by embodying the membrane effect. If the rigid boundary condition constrains the lateral displacement of the floor, the trend of the slab edge...
For the calculation of the punching shear capacity, the design codes suggest a reduction of the shear force by the soil pressure within the control perimeter. The assumption of a uniform, or linear stress distribution is commonly accepted. However, the stress distribution depends on the magnitude ...