Calculation of the Cantilever Beam Embedment in Masonry and Check of the Masonry for Local Bearing

Objective: Check of the local strength of masonry

Task: Check the load-bearing capacity of masonry under bearing stresses

References: Nasonov S.B. Manual for Design and Analysis of Building Structures. M: ASV Publishing House, 2013, p. 234-235.

Compliance with the codes: SP 15.13330.2012 

Initial data file:

Example 16 СП 2012.SAV
report – ComeIn 16 Nasonov.doc.

Initial data:

lo = 1,5 m Cantilever overhang length
a1 = 500 mm Length of the bearing part
b = 640 mm Brick wall thickness
q = 5 kN/m Uniformly distributed load on the beam
Q = 7,5 kN Beam support reaction
Brick grade M150
Mortar grade M50

KAMIN initial data:

Importance factor  γn = 1
Age of masonry - up to a year
Working life is 25 years
Stone/brick - Molded clay brick
Stone/brick grade - 150
Mortar - regular cement with mineral plasticizers
Mortar grade - 50

Support design:

 

 

Steel beam

 

Wide flange I-beam STO ASChM 20-93 – 60W1

Support conditions:

 

Cantilever

without distribution packing plates

L = 1.5 m
q = 0.51 T/m

 

B = 640 mm
Az = 500 mm

Comparison of solutions:

Check

Bearing deformation of masonry under the beam

Manual

7,5/39,0 = 0,192

KAMIN

0,185

Deviation, %

3,8 %

Comment: The difference in the results of the calculation is related to the fact that the self-weight of beams is always taken into account in KAMIN and only single beams are considered.