Project 1_Comparative study of different storey buildings for Seismic forces
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of stiffness on time period | Building E (10 storey with varying column size) | 1.731 s | The varying column sized building is more stable than the uniform sized column buildings because in uniform sized column building the excess mass is lumpded in the storey and it increases by the increase of the lateral loads therefore high lateral deflection is formed and it cause high in time perod. |
| Building F (10 storey with uniform column size) | 1.735 s | ||
| Effect of stiffness on time period | Building G (25 storey with varying column size) | 4.17 s | |
| Building H (25 storey with uniform column size) | 4.416 s |
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of mass on time period | Building H (25 storey with 3 KN/sq.m imposed load) | 4.416 s | Mass or loads is directily propotional to lateral displacement and the time period of the building. |
| Building J (25 storey with 3.3 KN/sq.m imposed load) | 4.425 s | ||
| Building K (25 storey with 3.6 KN/sq.m imposed load) | 4.435 s |
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of building height on time period | Building A (2 storey ) | 0.5 s | Time period is directly propotional to height of building |
| Building B (5 storey) | 1.03 s | ||
| Building F (10 storey) | 1.73 s | ||
| Building H (25 storey) | 4.41 s |
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of column oreintation on time period | Building B (All floors column size 400x400) | 1.03 s | The displacement in X and Y direction is almost same in B but in C the displacement in Y direction is greater than X direction and In D the displacement is greater in X direction than Y direction. |
| Building C (All floors column size 550x300 oriented in X- direction ) | 1.145 s | ||
| Building D (All floors column size 300x550 oriented in Y- direction) | 1.12 s |
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of column oreintation on time period | Building B (All floors column size 400x400) | 1.03 s | The displacement in X and Y direction is almost same in B but in C the displacement in Y direction is greater than X direction and In D the displacement is greater in X direction than Y direction. |
| Building C (All floors column size 550x300 oriented in X- direction ) | 1.145 s | ||
| Building D (All floors column size 300x550 oriented in Y- direction) | 1.12 s |
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of flexural stiffness of structural elements on mode shapes in building B | flexural stiffness of beams close to nil (zero inertia) | 1.967 s | There is a affective difference in the time period if there is stiffness is considered. |
| full flexural stiffness of beams (regular) | 1.03 s |
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of axial stiffness of vertical members on mode shapes in building H | axial cross section for column is close to nil (zero inertia) | 4.9 s | There is a affective difference in the time period if there is stiffness is considered. |
| full axial cross section for column (regular) | 4.41 s |
| CRITERIA | MODEL | ANALYSIS RESULT | CONCLUSION |
|---|---|---|---|
| Effect of degree of fixity at column base on mode shape in building B | Column support pinned (regular) | 1.03 s | There is a affective difference in the time period if there is stiffness is considered. |
| Column support fixed) | 0.941 s |