concrete slab design on top of silo

huangyhg

concrete slab design on top of silo
need help.  does anyone know of a design reference for the design of a concrete slab that will be supported by concrete walls?  we have to design a slab for a 32' diameter silo.  the slab will support a water tank.
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will the slab be uniformly loaded or with concentrated loads?
you might find some formulas for bending moments in a round slab in roark. i would probably take a more simplified approach by assuming a square box of size 0.9 d and then designing rebar in two direction. this should work for uniform load.
for concentrated loads, i probably would recommend using an fem approach.