Selection of beam reinforcement
Objective: Selection of beam reinforcement
Task: Select area of the longitudinal reinforcement
References: Bliharsky Z.Y. Calculation and construction of bending reinforced concrete elements: Educational Guide / Z.Y. Bliharsky, I.I. Karhut. – Lviv: Lviv Polytechnic Publisher, 2017. – 188 p. (Example 4.2, p. 48-49)
Initial data file:
ARBAT mode – Selection of section reinforcement
Example-4.2-DBN.SAV
report – Arbat 4.2-DBN.doc.
Compliance with the codes: DBN V 2.6-98:2009, DSTU B.V 2.6-156:2010
Initial data:
b×h = 200×600 mm |
Cross-section sizes |
а = 30 mm |
Distance to the center of gravity of reinforcement |
М= 135 кНм |
Bending moment |
Concrete class |
С20/25 |
Initial data in ARBAT:
Importance factor γn = 1
Member length 1 m
Effective length factor in the XoY plane 1
Effective length factor in the XoZ plane 1
Random eccentricity along Z according to DBN B.2.6-98:2009 with modification No.1
Random eccentricity along Y according to DBN B.2.6-98:2009 with modification No.1
The structure is statically determinate
Section
b = 200 mm h = 600 mm a1 = 30 mm a2 = 30 mm |
---|
Reinforcement |
Class |
Additional service factor |
---|---|---|
Longitudinal |
A400C |
1 |
Transverse |
A240C |
1 |
Concrete
Concrete type: Heavy-weight
Concrete class: C20/25
Aggregate: Quartzite
Additional parameters |
|||
---|---|---|---|
Additional service factor |
1 |
|
|
Age of concrete (days) |
28 |
|
|
Cement strength class |
Class R |
|
|
Creep development time |
36500 |
days |
|
Temperature T(Δt) |
20 |
°C |
|
Number of days when the temperature T prevails Δt |
28 |
days |
|
Relative humidity |
40 |
% |
|
|
N |
My |
Qz |
Mz |
Qy |
T |
Factor for sustained load |
Short-term |
Seismicity |
Special |
---|---|---|---|---|---|---|---|---|---|---|
kN |
kN*m |
kN |
kN*m |
kN |
kN*m |
|||||
1 |
0 |
135 |
0 |
0 |
0 |
0 |
1 |
|
|
|
Results of the reinforcement selection
Type |
Asymmetric reinforcement |
Symmetric reinforcement |
|||
---|---|---|---|---|---|
AS1 |
% |
AS1 |
% |
|
|
cm2 |
cm2 |
|
|||
total |
7,13 |
0,625 |
6,941 |
1,218 |
|
Comparison of solutions
Check |
Selected reinforcement |
Guide |
707,6 mm2 |
ARBAT |
713,0 mm2 |
Deviation, % |
0,8 % |