Analysis of Singly Reinforced Beam

Sheet1

Analysis of 

START

d

Define Beam Properties: d, b, As, fy, fc'

As

b Input Parame d= b= As = Fy = Fc' =

Compute for a a = (As fy) / (0.85 fc' b)

Step 1: Comp C = 0.85 f'c ab T = As fy

Compute for c c=a/β

Σfh = 0 As fy = 0.85 fc a = (As fy) / (0 a= Step 2: Comp εc = fy / 2000 εc =

Compute for εs εs = 0.003(d-c)/c

a=βc where β = 0.85 – 0.0 β = 0.85

Compute for   Nominal Moment

β= c= Step 3: Chec 0.003/c = εs/(

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Sheet1 εs =

Compute for  Ultimate Moment

Step 4: Comp Mn = As fy (d Mn = Step 5: Comp Mu = 0.90(Mn Mu =

FINISH

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Sheet1

ingly Reinforced Rectangular Concrete Beams: Beams Reinforced for Tension εc = 0.003

0.85f'c a/2

a

C c

N.A.

N.A. (d-a/2) T = Asfs εs

ters in yellow cells (in SI units) 500 mm 300 mm 3060 sq. mm 270 Mpa 35 Mpa

Results Summary a= c= εs = Mn = Mu =

ute for a compressive force of concrete tensile force of steel reinforcement

' ab .85 fc' b) 92.57 mm ute for c 0 0.00135 c=a/β (fc' – 30)/7

when fc' > 30 when f'c < = 30

0.814 113.68 mm if steel yields -c)

εs = 0.003(d-c)/c

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92.57 mm 113.68 mm 0.01 steel yields 374.86 KN – m 337.37 KN – m

Sheet1 0.010

steel yields

ute for Nominal Moment Capacity of the Beam a/2) 374.86 KN – m ute for Ultimate Moment Capacity of the Beam 337.37 KN – m

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