TOPIC 6 Flashcards
This type of material returns to its original shape after deformation but can also experience permanent deformation if the stress
exceeds a certain limit
ELASTIC MATERIAL
It determines how a
structure deforms under seismic forces
BEAM-TO-COLUMN STIFFNESS RATIO
What does it mean
when the building has higher forces but
lower displacement.
SHORTER T
It is the time it
takes for a building or structure to
complete one full cycle of vibration when
it is shaken by an earthquake or other
dynamic forces.
FUNDAMENTAL PERIOD T1
This response is
characterized by different vibrational
modes, where each mode represents a
unique deformation shape of the
structure.
HEIGHT-WISE VARIATION OF HIGHER MODE RESPONSE
This is the simplest
and most dominant vibration pattern that
occurs when a structure experiences
seismic forces.
FIRST MODE
Flexural beam, ρ =
____
0
The amplitude of
the structure’s response in each mode due
to earthquake excitation.
SPECTRAL ORDINATE, An
It is a condition in
which the first floor has significantly lower
strength than the floors above.
WEAK FIRST STORY
What does the
symbol Ay represent in the equation for
base shear yield strength?
PSEUDO ACCELERATION
Refers to the more complex vibration patterns beyond the
first mode.
HIGHER MODE
It refers to a
structure where the first floor is much
more flexible than the upper floors.
SOFT FIRST STORY
Structures
subjected to dynamic forces, such as
earthquakes or wind loads, vibrate in
multiple modes simultaneously.
MODAL CONTRIBUTOR FACTOR
shear beam, ρ =
____
INFINITY oo
A material
response where deformation remains
even after the applied force is removed,
indicating energy dissipation within the
material
INELASTIC DEFORMATION
The property of a material that allows it to return to its
original form after the removal of applied
stress.
HARDNESS
A force applied to
an object that causes it to change shape,
leading to either elastic or inelastic
behavior depending on the material’s
properties.
LOAD
It determines how
forces are distributed between beams and
columns.
BEAM TO COLUMN STIFFNESS RATIO
It simplifies
seismic analysis by using a single-degree
of-freedom model with the same natural
period, damping ratio, and weight as the
multistory building.
CORRESPONDING SDF SYSTEM
If rn=rn^st(An),
what is the alternative equation for modal
contribution factor?
rn=r^st(rn)(An)
List down the influences where the height-wise variation in tall buildings are evident:
STORY DISPLACEMENT
STORY ACCELERATIONS
INTERSTORY DRIFT
BASE SHEAR AND OVERTURNING MOMENT
