Challenge

Project 1_Comparative study of different storey buildings for Seismic forces

Criteria Model Analysis Result-Time period Conclusion
Effect of Stiffness on Time period Building-E (10 Storey with different column size) 1.776 seconds While comparing the model with time period for the varying column sizes,in top floor the column sizes rduced which will reduce the mass in the top floor will directly reduces the displacement
Building-F (10 Storey with similar column size) 1.73 seconds
Building-G (25 Storey with different column size) 4.17 seconds
Building-H (25 Storey with similar column size) 4.417 seconds
Effect of mass on time period Building-H (25 Storey with 3KN/sq.m) 4.417 seconds Variation of the mass for the same height increases the time period of the vibration
Building-I (25 Storey with 3.3KN/sq.m) 4.426 seconds
Building-K (25 Storey with 3.6KN/sq.m) 4.436 seconds
Effect of building height on time period Building-A (25 Storey) 0.496 seconds Increase of the height icreases the time period of the system due to the vertical cantilever behaviour of building while lateral force acting
Building-B (55 Storey) 1.029 seconds
Building-F (10 Storey) 1.73 seconds
Building-H (25 Storey) 4.417 seconds
Criteria Model Cases Analysis Result Conclusion
Effect of flexural stiffness of structural Elements on mode shapes Building -B Flexural Stiffness of beam considered as nil( Inrtia-0) 2.6 seconds Neglecting the stiffness of the beam the system becames more flexible
Full Flexural Stiffness of beam( Regular) 1.029 seconds
Criteria Model Cases Analysis Result Conclusion
Effect of Axial stiffness of structural Elements on mode shapes Building -H Axial Stiffness of beam considered as nil( Inrtia-0) 5.99 seconds Axial stiffness play minor role in mode shapes, since it is based only on vertical vibration not depend on horizontal/lateral forces.
Full Axial Stiffness of beam( Regular) 4.989 seconds
Criteria Model Cases Analysis Result Conclusion
Effect of Degree of fixity at column base on mode shapes Building -B Column Supports pinned (Regular) 1.029 seconds More the fixity lesser the deflection
Column Supports fixed 0.935 seconds
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