Local Compression Analysis

Objective: Check the local compression analysis of the foundation

Task: Verify the correctness of the local compression analysis

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. 101-102.

Initial data file:

Example 48.SAV
report – Arbat 48.doc.

Compliance with the codes: SNiP 2.03.01-84*. 

Initial data:

b = 0,8  m Width of the foundation
a1×a2 = 300×200 mm Sizes of the load application area
Asx = Asy = 7,1 mm2 (1Ø3) Cross-sectional area of reinforcement
N = 1000 kN Vertical load

Concrete class
Class of reinforcement

В12,5
Вр-І

ARBAT initial data:

Importance factor γn = 1

Load arrangement:

Local load applied to a part of length and width of an element Local edge load within a protruding part of a wall or a pier

 

a = 300 мм
b = 800 мм
c = 200 мм
d = 200 мм

Number of load application areas - one

 

Lateral reinforcement by flat meshes:

Class of reinforcement: B500
Arrangement of meshes

Concrete cover a = 20 mm
Spacing of meshes b = 100 mm
Number of meshes - 2

Meshes:

Meshes

Rebars along X
     Diameter 3 mm
     Spacing ax = 100 mm
     Number of rebars - 4

Rebars along Y
     Diameter 3 mm
     Spacing ay = 100 mm
     Number of rebars - 5

 

Concrete:

Concrete type: Heavy-weight
Concrete class: B12,5

Service factor for concrete

γb2

allowance for the sustained loads

 

 

resulting factor without γb2

1

 

Comparison of solutions:

Check

strength condition of local compression

Guide

1000/1182 = 0,846

ARBAT

0,84

Deviation, %

0,7 %