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 |
COMEIN 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 |
B = 640 mm |
Comparison of solutions:
|
Check |
Bearing deformation of masonry under the beam |
|
Manual |
7,5/39,0 = 0,192 |
|
COMEIN |
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 ComeIn and only single beams are considered.