Table 6 Behavior Coefficient of Buildings
System of Structure | Lateral Force Resisting System | R | |
1 |
Bearing
Walls System: in which the walls support all or the most parts of the vertical loads, and resistance to seismic lateral force is provided by shear walls. |
a) Reinforced concrete shear walls b) Reinforced masonry shear walls |
5
4 |
2 | Simple
Space Frame System: in which the space frame with simple connections supports all vertical loads, and resistance to seismic lateral forces is provided by shear walls or bracings. |
a)
Reinforced concrete shear walls
b) Bracings c) Reinforced masonry shear walls |
7
7 5 |
3 | Moment
Resisting Space Frame System: in which the space frame, alone, supports, all vertical loads and seismic lateral forces (without shear walls or bracings). |
a)
Steel moment resisting space frame
b) Reinforced concrete moment |
6
5 |
4 | Combined
System of Moment Resisting Space Frame and Shear Walls or Bracings: In this system the space frame supports the vertical loads, and resistance to seismic lateral forces is provided jointly by the space frame and the shear walls or by the space frame and the bracings. The seismic lateral forces are distributed between the space frame and the shear walls or between the space frame and the bracings in proportion to their rigidities but in any case the frame alone should be capable of supporting at least 25% of the seismic lateral forces. |
a) Moment Resisting frame+reinforced b) Moment resisting frame+bracings |
8 8 |