After the advent of series of major earth quakes in and around India the codes of the land have been revised. In the urban areas depending upon the architectural needs and the cost of land it has become necessary to adopt high rise to very high rise buildings with regular to irregular orientation. The present practice in seismic design is to adopt Response spectrum method of structural analysis. The code leaves the application of method of dynamic analysis making use of Time History Analysis concept to the discretion of the designer. In this context in the present project, a 1- storey building has been analyzed Time History Analysis making use of E-tabs. A simplified nonlinear analysis procedure to predict earthquake responses of multi-story asymmetric buildings is presented and some examples are shown in this paper. In this procedure, the comparison of three multi-storied building i.e,

1. Symmetric structure.
2. Mass as-symmetric structure.
3. Stiffness as-symmetric structure.

In brief, In the symmetric structure, the mass, columns, beams which has same mass and sizes with floor to floor respectively has been analyzed by time history analysis. In the mass as-symmetric structure, the size of columns and beams are of same size but the loading of mass is different from span to span has been analyzed by time history analysis and in stiffness as-symmetric structure loading of mass is same from floor to floor but the size of column are different has been analyzed by time history analysis A comparison of the three sets of results demonstrates both the capabilities and limitations of the proposed procedure with help of graphs.