Strength Analysis of a Rectangular Section
Objective: Check of the strength analysis of the section
Task: Verify the correctness of the strength analysis of the section
References: Guide on designing of concrete and reinforced concrete structures made of heavy-weight or lightweight concrete (no prestressing) (to SNiP 2.03.01-84), 1989, p. 26.
Initial data file:
report – Arbat 3 SNiP.doc.
Compliance with the codes: SNiP 2.03.01-84*.
Initial data:
b = 200 mm | Beam section sizes |
h = 800 mm | |
а = 50 mm | Distance from the center of gravity of the reinforcement to the compressed edge of the section |
As = 2945 mm2 (6Ø25) | Cross-sectional area of reinforcement |
Concrete class Class of reinforcement |
В25 |
М = 550 kNm | Bending moment in the section |
ARBAT initial data:
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 SNiP 2.03.01-84* (Russia and other CIS countries)
Random eccentricity along Y according to SNiP 2.03.01-84* (Russia and other CIS countries)
Structure is statically determinate
Limit slenderness - 200
Section:
b = 300 mm
|
S1 - 6Ø25 |
---|
Reinforcement |
Class |
Service factor |
Longitudinal |
A-III |
1 |
Transverse |
A-I |
1 |
Concrete:
Concrete type: Heavy-weight
Concrete class: B25
Hardening conditions: Natural
Hardening factor 1
Service factor for concrete |
||
---|---|---|
γb2 |
allowance for the sustained loads |
0.9 |
|
resulting factor without γb2 |
1 |
Results for combinations of loadings
|
N |
My |
Qz |
Mz |
Qy |
T |
Safety factor for load |
Factor for sustained load |
Short-term |
Seismic |
---|---|---|---|---|---|---|---|---|---|---|
kN |
kN*m |
kN |
kN*m |
kN |
kN*m |
|||||
1 |
0 |
550 |
0 |
0 |
0 |
0 |
1 |
1 |
|
|
Comparison of solutions:
Check |
strength of the section |
Guide |
550/636,4 = 0,864 |
ARBAT |
0,859 |
Deviation, % |
0,6 % |