Strength Analysis of a T-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. 27-28.

Initial data file:

Example 7.SAV
report – Arbat 7 SNiP.doc.

Compliance with the codes: SNiP 2.03.01-84*. 

Initial data:

b = 200 mm	Beam section sizes
h = 600 mm
b/f = 400 mm
h/f = 100 mm
а = 50 mm	Distance from the center of gravity of the reinforcement to the compressed edge of the section
As = 1964 mm2 (4Ø25)	Cross-sectional area of reinforcement
Concrete class	В25
Class of reinforcement	А-III
M=300 kN*m	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 2.03.01-84* (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 = 200 mm h = 600 mm b1 = 400 mm h1 = 100 mm a1 = 58.5 mm a2 = 20 mm	S1 - 4     Ø25

 

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	300	0	0	0	0	1	1

 

Comparison of solutions:

Check	strength of the section
Guide	300/327,1 = 0,917
ARBAT	0,914
Deviation, %	0,3 %