SEISMIC RESPONSE OF BUILDING HAVING IRREGULARITIES UNDER UNI-DIRECTIONAL & BI-DIRECTIONAL FORCES: A REVIEW
Keywords:
Angle of excitation, uni-directional and bi-directional force, seismic performance, irregularitiesAbstract
when a structure is subjected to ground motion in an earthquake, it responds by vibration. It
can be resolved in two horizontal (x and y) and one vertical direction (z), with rotational ground motion
neglected. In seismic design code (IS-1893(Part-1)-2016) recommendation given are simultaneous effect of
two horizontal component of earthquake excitation is considered by applying 100% of earthquake force in
the direction of building in main axis & 30% of those forces in another axis. While in reality the direction
of the dominant component of excitations might not be one of the main directions of the building axes.
Hence in this research work the response of building with different irregularities subjected to unidirectional & bi-directional earthquake forces have been obtained by considering arbitrary excitation angle
of the ground motion. A set of value from 0 to 360 degree with different degree have been used for angle of
excitation & find out critical angle.