Analysis of Short Cantilevers
Objective: Check of the analysis of short cantilevers
Task: Verify the correctness of the analysis of short cantilevers
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. 105-106.
Initial data file:
Example 49.SAV
report – Arbat 49.doc.
Compliance with the codes: SNiP 2.03.01-84*.
Initial data:
b = 400 mm | Width of the cantilever |
h = 700 mm | Height of the cantilever |
l1 = 350 mm | Cantilever overhang length |
lsup,f = 300 mm | Length of the bearing area along the cantilever |
As = 1140 mm2 (3Ø22) | Cross-sectional area of longitudinal reinforcement |
Asw = 157 mm2 (1Ø10) | Cross-sectional area of transverse reinforcement |
N = 700 kN | Vertical load on the cantilever |
Concrete class |
В25 |
ARBAT initial data:
Importance factor γn = 1
Hinge bearing of the girder on the column cantilever |
h = 700 mm |
Width of the column (cantilever) b = 400 mm
Length of the girder bearing area L2 = 300 mm
Concrete cover a1 = 19 mm
Width of the girder b1 = 400 mm
Load on the column cantilever Qc = 700 kN
Longitudinal reinforcement of the cantilever A-III 3Ø22
Transverse reinforcement of the cantilever A-III Ø10, spacing of stirrups 150 mm
Concrete:
Concrete type: Heavy-weight
Concrete class: B25
Service factor for concrete |
||
---|---|---|
γb2 |
allowance for the sustained loads |
0.9 |
Comparison of solutions:
Check |
Providing strength in an oblique compressed strip between a load and a support |
Guide |
700/717 = 0,976 |
ARBAT |
0,973 |
Deviation, % |
0,3 % |
Check |
Load-bearing capacity of the longitudinal reinforcement |
Guide |
1002/1140 = 0,879 |
ARBAT |
0,879 |
Deviation, % |
0 % |