Dimensioning of gravity wall - masonry according to GB 50003-2011
The masonry is verified for the load caused by the combination of the compressive normal force and the bending moment and for the load due to the shear force.
Verification of compression bearing capacity
Non-seismic design situation (Art 5.1.1):
Seismic design situation (Art 10.1):
where: | γ0 | - | coefficient of importance of structure |
N | - | design value of normal force | |
f | - | design value of compressive strength of masonry | |
A | - | area of cross section | |
φ | - | influence factor due to eccentricity of normal force and depth-thickness ratio of structure | |
γRE | - | seismic adjusting coefficient for compressive strength of masonry |
φ is provided by:
When β ≤ 3 (Art D.0.1-1)
When β > 3 (Art D.0.1-2, D.0.1-3)
where: | e | - | eccentricity of normal force acting on the cross section |
B | - | depth of the cross section | |
φ0 | - | stability coefficient of structure loaded with axial pressure | |
α | - | coefficient due to strength grade of mortar | |
β | - | depth-thickness ratio of structure |
β is provided by:
where: | γβ | - | adjusting coefficient of depth-thickness ratio based on the type of masonry material |
H | - | height of the structure above cross section |
Verification of shear bearing capacity
Non-seismic design situation (Art. 5.5.1-1):
Seismic design situation (Art. 10.1):
When γG ≤ 1.2 (Art 5.5.1-2):
When γG ≥ 1.35 (Art 5.5.1-3):
Intermediate values are interpolated.
where: | γ0 | - | coefficient of importance of structure |
V | - | design value of shear force | |
fv | - | design value of shear strength of masonry | |
A | - | area of cross section | |
σ0 | - | average value of normal stress on cross section | |
f | - | design value of compressive strength of masonry | |
γG | - | partial factor for permanent actions | |
α | - | correction factor; when γG ≤ 1.2: α = 0.64; γG ≥ 1.35: α = 0.66 Intermediate values are interpolated | |
μ | - | influence factor for shear-compression load | |
γRE | - | seismic adjusting coefficient for shear strength of masonry |