1. the allowable stress design1
Stress on materials:
the allowable stress design
method

2. Stress on materials: the allowable stress…
If you have any doubts, you can check your textbook, pp

3. Stress on materials: the allowable stress…
Lesson 4
Walls: resistance
resistance to compression characteristic resistance
to compression of the wall
resistance to shear stress characteristic resist. to shear stress
Walls: load combination where Ψ0ì = 1
Walls: maximum stress at the supports
simple support with N = reaction of the support
a, b = size of the support
fixed or semi-fixed support with M = moment of support
with

4. Stress on materials: the allowable stress…
Lesson 6
Walls: tests on the plane of the wall; combined bending and compression
where
Nd = total load on the section
Φl , Φ = coefficients of reduction of the resistant section due to the eccentricity of the load and to the slenderness of the wall
A = resistant area of the section
Walls: tests on the plane of the wall; shear stress
where Vd = shear stress on the wall
b = 1 for e ≤ 0,167l
b = % compressed length for 0,167l ≤ e ≤ 0,22l

5. Stress on materials: the allowable stress…
Lesson 6
Walls: concentrated loads
where
where Aeff = leff · t
and in any case
elements
of category 2
of category 1

6. Stress on materials: the allowable stress…
Lesson 7
Wood: load combinations
where gG= 1,4 (= 1 if favourable to the resistance)
gQ = 1,5 (= 0 if favourable to the resistance)
Ψ0i = combination coefficient (charts)
Wood: tests
bending
shear stress

7. Stress on materials: the allowable stress…
Lesson 8
Steel: resistance
Fe360 σd =160N/mm2 Shear stress
Fe430 σd = 190 N/mm2
Fe510 σd = 240 N/mm2
Steel: load combination
where
γQi = 1 (= 0 if favourable to the resistance)
ψ0i = combination coefficient (charts)
Steel: tests
bending
shear stress where Av = 1,04 ⋅ h ⋅ sa

8. Stress on materials: the allowable stress…
Lesson 9
Reinforced concrete: resistance Reinforced concrete:
bending (N/mm2) compression
compression
shear stress
steel
load combination
where
γQi = 1 (= 0 if favourable to the resistance)
ψ0i = combination coefficient (charts)

9. Stress on materials: the allowable stress…
Lesson 11
Reinforced concrete: bending
Lesson 12
Reinf. concrete: resistant moments
Mr = min(Mrc, Mrs) where:
Lesson 15
Reinforced concrete: shear stress
resistance of the concrete
mix without rebar
τc0 ≤ τmax ≤ τc1
necessary transverse rebar
τmax >τc1
section not tested for shear stress

10. Stress on materials: the allowable stress…
Lesson 16
Reinforced concrete: transverse rebar
minimum transverse rebar
at the supports
area of the transverse rebar
area of the bent-up bars
where:
mst = number of transverse bars for 1 m
b, h = sizes of the beam in cm
Ast = area of a transverse bar in m2
V = shear stress