Design of a two-way slab - Reinforced Concrete with FRP Bars: Mechanics and Design - page 307

Stress-strain curve equation:

ε
ε

c

2" ⋅σ ⋅ c

()

c0

σε = :

cc

2

ε
ε

c

1+

c0

Concrete Compressive Stress-Strain Curve

4000

2000

0

0 0.001 0.002 0.003

Strain, in./in.

8.4 STEP 2—COMPUTE THE FACTORED LOADS

As a first guess, the following slab thickness, t slab , was selected:

t slab := 8 in.

The self-weight of the slab is computed considering a concrete density of
145 psf. Other dead loads such as floor cover (0.5 psf) and ceiling (2 psf)
are considered. A live load of 100 psf was requested by the owner. The fol-
lowing unfactored uniform loads are considered:

SW := t slab ∙ρ c = 96.7∙psf Slab self-weight

OD := 2.5 psf Other dead loads

DL := SW + OD = 99.2∙psf Total dead load

LL o := 100 psf Live load

The governing load combination for computing the total factored load,
TFL, is load combination Equation (9-2) defined in Section 9.2.1 of ACI
318-11:

TFL := 1.2·DL + 1.6·LL = 279·psf