Hi Chandni,

Hope your doing well with your model. the attached paper might help you to construct constitutive model for masonry and mortar .

Best regards

Hi Hossam,

i'm so interrested in this topic can you please re-upload this document. i can't download it !

Thank you

I conducted research on masonry walls with solid ceramic bricks subjected to a vertical shear. What are the parameters you need exactly?

Dear Adam,

For total strain crack model (brick) and interface element (mortar ), i need following properties.

Brick

fc

Compressive Strength

ft

Tensile Strength

E

Modulus of Elasticity

v

Poisson Ratio

GfI

First Mode Fracture Energy

Gfc

Fracture Energy in Compression

Interface

fc

Compressive Strength

ft

Tensile Strength

c

shear strength of the joint (cohesion)

Kn & Kt

Elastic properties of the interface

Tan φ

tangent of the friction angle

GfI

First Mode Fracture Energy

GfII

Second Mode Fracture Energy

Gfc

Fracture Energy in Compression

Tan ψ

Dilantancy angle

Tan φr

Residual friction angle

d

Softening Parameter

Cs

Shear traction contribution to the failure

u

Confining normal stress

Kp

Equivalent relative displacement

There are parameters which i obtained from material tests:

Brick:

fc = 28,8 N/mm2 - from full bricks

fc = 23,2 N/mm2 - from cores fi60x120 cut from bricks

ft = 1,40 N/mm2 - from splitting of full bricks

ft = 1,31 N/mm2 - from direct tension of cores fi60x120 cut from bricks

E = 3910 N/mm2 - from full bricks

E = 3570 N/mm2 - from cores fi60x120 cut from bricks

v = 0,179 - from full bricks

v = 0,131 - from cores fi60x120 cut from bricks

I didn't specify GfI and Gfc, but maybe plots in attached file will be useful for you

Mortar:

fc = 9,71 N/mm2 - from cube samples

fc = 7,63 N/mm2 - from stocky cylinders fi80x80

fc = 7,03 N/mm2 - from slender cylinders fi60x120

ft = 0,492 N/mm2 - from splitting of cylinders fi80x80

ft = 0,521 N/mm2 - from direct tension of cylinders

Interface:

c = 0,425 N/mm2 - from triple brick test

Kt = 138 kN/mm - from triple brick test

I know nothing about Kn, GfI because i didn't measure displacements (strains) during direct tension tests of two bricks joined with mortar; mean tension strength of such specimens was 0,011 N/mm2.

Friction coefficient = 1,061 - from triple brick test

Residual friction coefficient = 0,845 - from triple brick test

d = 0,373

I didn't specify the rest of the parameters, but maybe you will be able to interpret something ftom plots in attached file.

Good luck

Dear Adam,

Thank you.