The Effect of the Earthquake on a Building Depends Not Only on the Peak Value of Ground
Acceleration, But Also on the Size and Shape of the Building, the Arrangement of Structural Elements, And
The Presence of Mass and Stiffness Irregularities. Dynamic Analysis Needs to Be Performed For Knowing
The Performance of the Structure Under Earthquake Loading. the Dynamic Analysis Can Be Linear or Nonlinear.
Linear Analysis Is Performed Using Response Spectrum Method. Non-Linear Analysis Can Be
Performed Using Time History Analysis. There Is Advancement In Computing Techniques With the Arrival
Of More Powerful Computers. Advanced Computer Programmes and Applications Are Developed For
Seismic Analysis of the Structures. In Present Study a Programme Is Written In Mathcadsoftware and The
Output Is Validated For With Professional Software Staad.Pro For Different Configurations of The
Structures.The Modal Response Is Compared For Evaluating Natural Frequency, Fundamental Time Period,
Modal Frequency, Mode Shape Coefficients.