Reinforcement Detailing of Beams from ETABS output
Ans:-
To analyze the given ETABS model and to extract the design results and detailing of two mentioned RC beams. Also, the design recheck for Grid-A RC beam has to be done.
Longitudinal Reinforcement of Beam(mm2)
- Go to Longitudinal Reinforcement of Beam at Grid-3 from the ETABS (mm2)
Now we have to draw the reinforcement details in the auto-cad software
First, we have to calculate the rebars Ast for the beam top and bottom section
Seven-span continuous beam along grid 3 Longitudinal reinforcement of beam at grid three from ETABS (mm^2)
Grid 3:
At Top:
1) Maximum Ast at Support = 194
2) Maximum Ast at Middle = 485.
* 2 dia of 32mm = 1606
* 1 dia of 25 mm = 490
Therefore, to satisfy the support, we need to provide two dia of 32mm bar, and additionally, in the middle, we need to provide one dia of 25mm.
At Bottom:
1) Maximum Ast at Support = 1056
2) Maximum Ast at Middle = 1501
* 3 dia of 25mm = 1470
* 1 dia of 16mm = 200.96
Therefore, to satisfy the support, we need to provide three dia of 25mm bar, and additionally, in the middle, we need to provide one dia of 16mm.
grid A:
At Top:
1) Maximum Ast at Support = 2045
2) Maximum Ast at Middle = 477.
* 2 dia of 32mm = 1606
* 1 dia of 25 mm = 490
Therefore, to satisfy the support, we need to provide two dia of 32mm bar and additionally need to provide one dia of 25mm.
At Bottom:
1) Maximum Ast at Support = 1927
2) Maximum Ast at Middle = 789
* 2 dia of 32mm = 1606
* 1 dia of 16mm = 200.96
Therefore, to satisfy the support, we need to provide two dia of 32mm bar, and additionally, in the middle, we need to provide one dia of 16mm.
Q(3)
Ans:-
Sway shear force to Right :
Mas = 174 km
Mbh = 293 km
Lab=4.725 m
V.d+l = 92 kN
After substituting the values, we get,
V u,a= 46 kN
V u,b = 230 kN
Sway shear force to the left:
Mah = 234 km
Mbs = 155 km
Lab=4.725 m
V.d+l = 70 kN
After substituting the values, we get,
V u,a= 185 kN
V u,b = 45 kN