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 heavyweight or lightweight concrete (no prestressing) (to SNiP 2.03.0184), 1989, p. 26.
Initial data file:
report – Arbat 3 SNiP.doc.
Compliance with the codes: SNiP 2.03.0184*.
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 
A_{s} = 2945 mm^{2} (6Ø25)  Crosssectional area of reinforcement 
Concrete class Class of reinforcement 
В25 
М = 550 kNm  Bending moment in the section 
ARBAT initial data:
Importance factor γ_{n} = 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 2.03.0184* (Russia and other CIS countries)
Random eccentricity along Y according to SNiP 2.03.0184* (Russia and other CIS countries)
Structure is statically determinate
Limit slenderness  200
Section:
b = 300 mm

S1  6Ø25 

Reinforcement 
Class 
Service factor 
Longitudinal 
AIII 
1 
Transverse 
AI 
1 
Concrete:
Concrete type: Heavyweight
Concrete class: B25
Hardening conditions: Natural
Hardening factor 1
Service factor for concrete 


γ_{b2} 
allowance for the sustained loads 
0.9 

resulting factor without γ_{b2} 
1 
Results for combinations of loadings

N 
M_{y} 
Q_{z} 
M_{z} 
Q_{y} 
T 
Safety factor for load 
Factor for sustained load 
Shortterm 
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 % 