Material characteristics
Database of material characteristics is based on production sheets of the individual manufacturers. Characteristics of general masonry units are calculated in accordance with EN 1996-1-1.
Characteristic compressive strength of masonry
Characteristic compressive strength of masonry is calculated using equation
where: | fk |
|
K |
| |
α,β |
| |
fb |
| |
fm |
|
Modified equation for masonry made with general purpose mortar and lightweight mortar:
Modified equation for masonry made with thin layer mortar, in bed joints of thickness 0.5mm to 3mm, and clay units of Group 1 and 4, calcium silicate, aggregate units and aac units:
Modified equation for masonry units made with thin layer mortar, in bed joints of thickness 0.5mmto 3mm, and clay units of Group 2 and 3:
Value of the constant K is given in the table 3.3 in EN 1996-1-1. Where load acts parallel to the direction of the bed joints, the constant K should then be multiplied by 0.5 for units of Group 2 and 3. For masonry made with general purpose mortar where there is a mortar joint parallel to the face of the wall through the length of the wall, the constant K is reduced by 0.8.
The value K is multiplied by reduction factor dependent on the ratio g/t for shell bedded masonry.
where: | g |
|
t |
|
Minimal value of this ratio is 0.4. The value of the reduction factor is shown in the graph below:
Characteristic shear strength of masonry
Characteristic shear strength of masonry fvk for general purpose mortar, thin layer mortar in beds of thickness 0.5mm to 3.0mm or lightweight mortar with all joints filled is calculated using equation
but not greater than
where: | fvk |
|
fvko |
| |
σd |
| |
fb |
|
The characteristic shear strength of masonry using general purpose mortar or thin layer mortar in beds of thickness 0.5mm to 3.0mm or lightweight mortar having the perpend joints unfilled is calculated using equation
but not greater than
where: | fvk |
|
fvko |
| |
σd |
| |
fb |
|
The characteristic shear strength of shell bedded masonry is calculated using equation
but not greater than
where: | fvk |
|
fvko |
| |
g |
| |
t |
| |
σd |
| |
fb |
|
Characteristic flexural strength of masonry
Characteristic flexural strength of masonry is determined according to the chapter 3.6.3.
Modulus of elasticity
Modulus of elasticity is calculated using equation
where: | fk |
|
KE |
|