|
|
|
|
|
TABLE 1 |
|
|
|
|
|
|
|
|
|
VERTICAL |
|
LOAD EFFECT PENALTIES FOR IRREGULARITIES FOR |
|
|
IRREGULARITY |
CATEGORIES D, E & F (Expressed as percentage
increase of |
|
|
|
|
regular load effects) |
|
| |
|
|
|
D |
E & F |
|
| 1. |
Stiffness Irregularity |
0% Static load
Effect increase but |
0% Load Effect increase but |
|
|
(a) Soft Storey |
account for Dynamic Response on |
account for Dynamic Response |
|
| |
|
|
|
Load Effect |
on Load Effect |
|
|
(b) Extreme Soft Storey |
0% Static load
Effect increase but |
Not Permitted |
|
|
|
|
account for Dynamic Response on |
|
|
| |
|
|
|
Load Effect |
|
|
|
|
| 2. |
Mass Irregularity |
0% Load Effect
increase but |
0% Static Load Effect increase
but |
|
| |
|
|
|
account for Dynamic Response |
account for Dynamic
Response |
|
| 3. |
Geometric Irregularity |
0% Static Load
Effect increase but |
0% Static Load Effect
increase but |
|
|
Dynamic
Response on account |
account Dynamic Response on |
|
| |
|
|
|
for Load Effect |
|
Load Effect |
|
|
| 4. |
In plane Discontinuity |
25% Connection
of collector to |
25% Connection of collector
to |
|
|
Lateral Force Resisting |
vertical
elements |
vertical elements |
|
|
Elements |
|
|
|
Axial load Transfer in cols |
|
| |
|
|
|
|
|
|
100 to 200% increase |
|
| 5. |
Discontinuity in Lateral |
(For up to Category C |
|
|
|
|
|
Strength or Weak Story |
0.75 Cd resulting in a
possible |
|
|
|
|
|
increase 50 to
550%) |
|
|
|
|
2 storey |
Category D Not
Permitted |
Not Permitted |
|
|
> 2 storey |
Not Permitted |
Not Permitted |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|