Project : Title :

Location : Environmental Factors

Date : Ref No. :

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CALCULATIONS

Reference Code: ACI 350-06 "Code Requirements for Environmental Engineering Concrete Structures and

Commentary"

Parameters

h 100mm:= f'c 21MPa:= total depth of beam; compressive strength

of conc.

Sb 150mm:= fy 275MPa:= spacing of main bars; yield strength of

main bars

Environmental Factors

1. Flexure

ϕf 0.9:= strength reduction factor; S9.3.2

fs_flex β if h 16in≥ 1.2, 1.35, ( )←

α 25←

f's min320 ksi( )⋅

β Sb in1−( )⋅

2

α+⋅

36ksi,

←

max f's 20ksi, ( )

:= S10.6.4.4

S10.6.4.3

S10.6.4.2, normal environmental exposure

fs_flex 30.633 ksi⋅= flexural stress at outermost reinforcement

Sd_F maxϕf fy⋅

1.2 fs_flex⋅1,

:= Sd_F 1=

Sd_H maxϕf fy⋅

1.6 fs_flex⋅1,

:= Sd_H 1=

2. Shear

ϕv 0.75:= fs_shear 20ksi:= strength reduction factor, S9.3.2; shear

stress at severe exposure, S9.2.6.5

Sd_F_shear maxϕv fy⋅

1.2 fs_shear⋅1,

:= Sd_F_shear 1.246=

Sd_H_shear maxϕv fy⋅

1.6 fs_shear⋅1,

:= Sd_H_shear 1=