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 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 = 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 %