Projefct 1_Comparative study of different storey buildings for Seismic forces
AIM:
To do a comparative study o different story buildings for seismic forces
Procedure :
Building A:
- Two-story building
- beam : 300mm x 400 mm
- column : 400mm X 400 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis
Model participating mass ratio
Mode 2: T =0.46 seconds
Building B:
- 5 -story building
- beam : 300mm x 400 mm
- column : 400mm X 400 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis:
Model participating mass ratio
Building C :
- 5 -story building
- beam : 300mm x 400 mm
- column : 550mm X 300 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis
Building D:
- 5 -story building
- beam : 300mm x 400 mm
- column : 300mm X 550 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis :
Building E:
- 10 -story building
- beam : 300mm x 400 mm
- column : Bottom 5 ( 600mm X 600 mm )
- : Upper 5 ( 400 mm X 400 mm )
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis :
building f :
- 10 -story building
- beam : 300mm x 400 mm
- column :600mm x 600 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis :
Building G :
- 25 -story building
- beam : 300mm x 400 mm
- column : Bottom 10 ( 800mm X 800 mm )
- : Upper 10 ( 600 mm X 600 mm )
- : top upper 5 ( 400 mm x 400 mm)
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis :
Buiding h:
- 25 -story building
- beam : 300mm x 400 mm
- column :800 x 800 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2
Analysis :
building I :
- 25 -story building
- beam : 300mm x 400 mm
- column :800 x 800 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2 ( 10 percent )
with imposed mass 10 percent larger than h, therefore the imposed mass is 0.35
Analysis :
building j :
- 25 -story building
- beam : 300mm x 400 mm
- column :800 x 800 mm
- grade M30, Fe 415,
- Brick wall load = 10 Kn/m
- Live load 3 KN/m^2 ( 60 percent )
with imposed mass 20 percent larger than h, therefore the imposed mass is 0.45
Analysis :
Result :
Effect of stiffness :
natural periods of e and f
E=(ty = 1.53 , ty = 1.52 )
F = (ty = 1.53 , tx = 1.53 )
*there is only marginal difference in the fundamental natural period
Natural periods of G and H
G = ( ty1 = 3.7 , tx2 = 3.6 )
f = ( ty2= 3.9 , tx1= 3.9 )
*There is only marginal difference in the fundamental natural period
Effect on mass
*H, J and K. Have the buildings become more flexible due to the increase imposed mass
Effect of building height :
* fundamental natural periods of buildings increases with height
Effect of Column Orientation on T:
*there is only marginal difference in the fundamental natural period when compared with c and d .