Correct Answer - Option 3 : 5
Explanation:
Response reduction factor:
It is the factor by which the actual base shear force, that would be generated if the structure were to remain elastic during its response to the Design Basis Earthquake (DBE ) shaking, shall be reduced to obtain the design lateral force.
Response reduction factor for building systems:
| Lateral Load Resisting System |
R-Value |
|
Building Frame Systems
1. Ordinary RC moment-resisting frame ( OMRF )
2. Special RC moment-resisting frame ( SMRF )
3. Steel frame with
a) Concentric braces
b) Eccentric braces
4. Steel moment-resisting frame designed as per SP 6 ( 6 )
|
3
5
4
5
5
|
|
Building with Shear Wall
5. Load bearing masonry wall buildings
a) Unreinforced
b) Reinforced with horizontal RC bands
c) Reinforced with horizontal RC bands and vertical bars at corners of rooms and jambs of openings
6. Ordinary reinforced concrete shear walls
7. Ductile shear walls
|
1.5
2.5
3
3
4
|
|
Buildings with Dual Systems
8. Ordinary shear wall with OMRF
9. Ordinary shear wall with SMRF
10. Ductile shear wall with OMRF
11. Ductile shear wall with SMRF
|
3
4
4.5
5
|
