Table Indonesia 2

STRUCTURE TYPE

CONSTRUCTION MATERIAL
OF THE SEISMIC ENERGY DISSIPATING ELEMENTS

STRUCTURAL
TYPE
FACTOR K

DUCTILE FRAMES




COUPLED SHEAR WALLS
WITH DUCTILE WALLS (1)

CANTILEVER DUCTILE
SHEAR WALLS (1)


CANTILEVER SHEAR WALLS OF LIMITED DUCTILITY (1)


DIAGONALLY BRACED
FRAMES


CANTILEVERED SINGLE
STOREY FRAMES (5)

CHIW4EYS, SMALL TANKS


OTHER STRUCTURES

Reinforced Concrete
Prestressed Concrete (3)
Steel
Timber

Reinforced Concrete


Reinforced Concrete
Reinforced Hollow Masonry
Timber (2)

Reinforced Concrete
Reinforced Hollow Masonry
Timber (2)

Reinforced Concrete
Steel
Timber

Reinforced Concrete
Steel

Reinforced Concrete
Steel

1.0
1.4
1.0
1.7

1.0


1.2
2.5
2.0

1.5
3.0
2.5

2.5
2.5
3.0

2.5
2.5

3.0
3.0

See Note4

 NOTES: (Refer to Commentary Clause C3.4.4 for further amplification.)

  1. Ductile shear walls are those in which the height-to-width ratio of individual walls exceeds 2. Walls of limited ductility are those that do not comply with this ratio.

  2. Timber shear walls are those in which a timber frame is clad with timber sheathing in such a way as to form a diaphragm capable of resisting horizontal loads.

  3. For structures in which members employ both prestressing and nonprestressed reinforcement to resist the seismic load a K value shall be determined by interpolating between that for reinforced concrete and prestressed concrete giving consideration to the proportion of the seismic load resisted by the two materials.

  4. Structures not falling within the categories listed in this table may be assigned a K factor by interpolation between the tabulated K values by a comparison of the structure’s ductility and energy dissipating capacity. A value of K = 4.0 should be used for structures not designed to resist earthquake.

  5. This value of K is applied where the horizontal restraint is provided by only one or two columns or there is no roof diaphragm capable of transferring the seismic load between the frames. If there are three or more columns and there is a roof diaphragm the frames may fall within the category of ductile frames.