Design spreadsheet for Reinforced concrete beams - Rectangular cross-section

Simple bending

Input data

Output data

General data

Parameters

Single reinforcement

q (kN/cm)

1.2

P (kN)

31.09

ϐx (cm)

0.259

Steel

CA-50

Mk (kN.cm)

3131.70

As (cm²)

3.12

Concrete

C25

Md (kN.cm)

4384.38

Domain

2

f_yk (Mpa)

500

fyd (kN/cm²)

43.48

ρmin

0.0015

f_ck (Mpa)

25

fcd (kN/cm²)

1.786

Asmin (cm²)

0.74

b_w (cm)

12

d (cm)

36

Double reinforcement

h (cm)

40

ϐx = 0.45

0.45

fyd' (kN/cm²)

simple

l (cm)

290

μlim (ϐx = 0.45)

0.2509

As' (cm²)

simple

d' (cm)

4

ϐx (Lim. Domain 2-3)

0.259

As (cm²)

simple

d'' (cm)

4

μlim (Domain 2-3)

0.158

a (cm)

96.67

ϐx (Lim. Domain 3-4)

0.628

Solution

γ_s

1.15

μlim (Domain 3-4)

0.32

Single reinforcement

γ_c

1.4

Mdlim (ϐx = 0.45) (kN.cm)

6967.85

As' (cm²)

simple

γ_f

1.4

Mdlim (Dom. 3-4) (kN.cm)

8886.86

As (cm²)

simple

E_s (Mpa)

210,000

x (cm)

9.324

As (cm²)

3.20

Steel - bamboo equivalence

σ_steel (kgf/cm²)

5000

F (Kgf)

16,000

σ_bamboo (kgf/cm²)

1922

Ab (cm²)

8.32

Dmáx. (cm)

1.16