Macro Model Disadvantages

1.1.1. Parameters depending
These models depends on the
• Aspect ratio of the frame
• Number of struts
• Width of the wall
• Binding glue
1.1.2. Advantages
Macro-models are applicable when the structure is composed of solid walls with sufficiently large dimensions so that the stresses across or along a macro-length will be essentially uniform. Macro-modelling is more practice oriented due to its reduced time, memory demands and as well as a user-friendly mesh generation. This type of modelling is most valuable when a compromise between accuracy and efficiency is needed macro models exhibit advantages in computational simplicity and efficiency.(2)
1.1.3. Disadvantages
The main uncertainty of these macro models are the area (width) of struts and its strength. Multi-strut macro model represents a compromise solution and they can be used for the approximate analysis of large structures. The strut model gives an estimate of the stiffness of the infilled frame and the axial forces induced in the surroundings.
1.2. MICRO-MODELING
1.2.1. Definition
Macro model are one in which the individual units and joints are considered and treated separately. Micro models are

The interface conditions such as slip, separation and frictional loss at the contact surface were considered using the link element. They were achieved by adjusting the axial, shear and tension force in the link element. The opening was modelled by assigning small values of infill thickness and Young’s modulus of elasticity of infill, but high value of Poison’s ratio. It was reported that the lateral stiffness of the structure decreases with the increases in opening size. The principal stresses were maximum at the corners of opening and the at compression ends. However, the author acknowledged that the equivalent diagonal strut mechanism may not be applicable for structures having an