4.1.8.3.(6)ATTRIBUTION:
Functional Statement:
F20
To support and withstand expected loads and forces.
Objective:
OS2.1
APPLICATION:
Design of the interaction during an earthquake of
the Seismic Force Resisting System and stiff elements that are not considered
part of the Seismic Force Resisting System.
This applies to buildings described in Sentence
1.3.3.2.(1) of Division A and to buildings to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application
of Part 9] that are required to be designed in accordance with the requirements
of Part 4.
INTENT:
To limit the probability that stiff elements that are not
considered part of the Seismic Force Resisting System will be subject to loads
for which they were not designed, which could lead to:
- stiffening of the structure, which could lead to a change in the dynamic characteristics of the building structure (natural period and mode shapes), which could lead to an increase in the inertial forces in the building structure, and
- inadequate strength in the stiff elements.
This is to limit the probability of structural
failure of the stiff elements and the Seismic Force Resisting System, which
could lead to harm to persons.
ATTRIBUTION:
Functional Statement:
F20
To support and withstand expected loads and forces.
F22
To limit movement under expected loads and forces.
Objective:
OP2.1, OP2.4
APPLICATION:
Design of the interaction during an earthquake of
the Seismic Force Resisting System and stiff elements that are not considered
part of the Seismic Force Resisting System.
This applies to buildings described in Sentence
1.3.3.2.(1) of Division A and to buildings to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application
of Part 9] that are required to be designed in accordance with the requirements
of Part 4.
INTENT:
To limit the probability that stiff elements that are not
considered part of the Seismic Force Resisting System will be subject to loads
for which they were not designed, which could lead to:
- stiffening of the structure, which could lead to a change in the dynamic characteristics of the building structure (natural period and mode shapes), which could lead to an increase in the inertial forces in the building structure, and
- inadequate strength in the stiff elements.
This is to limit the probability of:
- the excessive deformation of, or excessive stress in, the structural elements, which could lead to damage to the building, or
- the excessive deformation of, or excessive stress in, the building structure, which could lead to damage to the building, which could impede the intended use and occupancy of the building.