In addition to being stable to the inertial forces due to the acceleration on the part itself, the façade components are also sensitive to relative displacements. In addition to the seismic design forces, these components must be controlled for deformation due to the relative lateral displacement of the floors. The need for seismic evaluation of different types of facades depending on its material and its weight per unit area is presented. It should be noted that low, medium, high and very high seismicity levels are used according to the standard classification of 2800 Iran. If the façade needs a seismic assessment, it and its connections must be controlled for the calculated forces and the calculated relative displacement.
There are various methods for structural analysis and design, one of which is equivalent static analysis. When an earthquake occurs, the energy from the earthquake accelerates the structure in all three directions, and this ultimately creates additional forces in the members of the structure that the members must be able to withstand.
In time history analysis, the response of the structure is calculated using dynamic relationships in short time steps. In this method, the response of the structure under the excitation of the ground acceleration should be calculated based on at least three acceleration maps. If less than seven accelerometers are selected for analysis, their maximum effect must be considered to control deformation and internal forces. If seven or more accelerometers are used, the average value of their effect can be considered to control deformation and internal forces.