Selection of beam reinforcement

Objective: Selection of beam reinforcement

Task: Select area of the longitudinal reinforcement

References: Reinforced concrete desing to Eurocode 2. W.H.Mosley, J.H.Bumgey and R. Hulse, 2007  (Example  4.3, p. 76)

 

Initial data file:

ARBAT mode – Selection of section reinforcement

Example-4.3-EN.SAV
report – Arbat 4.3-EN.doc.

Compliance with the codes: EN 1992-1-1

Initial data:

b×h = 260×500 mm	Cross-section sizes
а1= 60 mm	Distance to the center of gravity of reinforcement to the lower edge
а2= 50 mm	Distance to the center of gravity of reinforcement to the upper edge
М= 285 кNm	Bending moment
Concrete class Class of reinforcement	С20/25 B500M(A)

 

Initial data in ARBAT:

Importance factor  K_FI = 1
Coefficient taking account of long term effects on the compressive strength aсс = 0,85
Member length 1 m
Effective length factor in the XoY plane 1
Effective length factor in the XoZ plane 1

 

Section

b = 260 mm h = 500 mm a1 = 60 mm a2 = 50 mm

 

Reinforcement	Class	Additional service factor
Longitudinal	B500M (A)	1
Transverse	B420S (B)	1

 

Concrete

Concrete type: Heavy-weight
Concrete class: C25/30
Aggregate: Quartzite

Additional parameters
additional service factor	1
Concrete age (days)	28
Cement strength class	Class R
Creep progress time	36500	days
Temperature T(Δt)	20	°C
The number of days where a temperature T prevails Δt	28	days
Relative humidity	40	%

 

		N	My	Vz	Mz	Vy	T
		T	kN*m	T	kN*m	T	kN*m
1	Fundamental combination	0	285	0	0	0	0

 

Results of the reinforcement selection

Type	Asymmetric reinforcement			Symmetric reinforcement
	AS1	AS2	%	AS1	%
	сm2	сm2		сm2
total	19,816	2,714	1,926	17,417	2,977

 

Comparison of solutions

Check	Selected reinforcement
Guide	AS1 + AS2 = 1777 + 438 = 2215 мм2
ARBAT	AS1 + AS2 = 1981,6 + 271,4 = 2253 мм2
Deviation, %	1,7 %