QUIZ FINAL EARTHQUAKE

Question 1

REFERS TO THE GUIDELINES AND
PRINCIPLES THAT INFLUENCE THE
BUILDING TO ACHIEVE BETTER
SEISMIC PERFORMANCE.

Answer 1

CONFIGURATION REQUIREMENTS

Question 2

KEY IDEAS IN CONFIGURATION PRINCIPLES

Answer 2

1. SYMMETRY
2. CONTINUITY
3. SIMPLICITY

Question 3

failure of structure starts at points of weakness. This weakness arises due to discontinuity in mass, stiffness, geometry of the structure, and etc. The structure having this discontinuity are termed as _________

Answer 3

Irregular structures.

Question 4

have no significant physical discontinuities in plan or vertical
configuration or in their lateral-force-resisting system such as the irregular features
described in Section 208.4.5.2

Answer 4

Regular Structures

Question 5

have significant physical discontinuities in plan or vertical
configuration or in their lateral-force-resisting systems.

Answer 5

Irregular Structures

Question 6

defined as the horizontal
displacement undergone by the
building with respect to its base
when subjected to horizontal forces
such as wind and earthquake loads

Answer 6

DRIFT

Question 7

defined as the displacement of one floor level of
the building with respect to its adjacent level above or below the
considered floor level.

Answer 7

STOREY DRIFT

Question 8

characterized by
vertical discontinuities in the distribution of
mass, stiffness and strength.

Answer 8

Vertical irregularities

Question 9

one in which the lateral stiffness is less than 70% of
that in the storey above or less than 80 percent of the average stiffness
of the three stories above.

Answer 9

soft storey

Question 10

it shall be considered to exist where the effective mass of
any storey is more than 150% of the effective mass of an adjacent storey

Answer 10

Mass irregularity

Question 11

shall be considered to exist where the horizontal
dimension of the lateral- force-resisting
system in any storey is more than 130 %
of that in an adjacent storey.

Answer 11

Vertical geometric irregularity

Question 12

one in which the storey
strength is less than 80% of that in the
storey above.

Answer 12

weak storey

Question 13

shall be considered to exist when the maximum storey drift, computed including accidental torsion, at one end of the structure transverse to an axis is more than 1.2 times the average of
the storey drifts of the two ends of thestructure

Answer 13

Torsional irregularity

Question 14

Plan configurations of a structure and its
lateral-force-resisting system contain re
entrant corners, where both projections of
the structure beyond a re-entrant corner
are greater than 15 % of the plan dimension
of the structure in the given direction

Answer 14

RE-ENTRANT CORNER IRREGULARITIES

Question 15

having cutout or open areas greater than
50% of the gross enclosed area of the
diaphragm, or changes in effective
diaphragm stiffness of more than 50 % from
one storey to the next

Answer 15

Diaphragms discontinuities

Question 16

Discontinuities in a lateral force
path, such as out-of-plane offsets of
the vertical elements

Answer 16

OUT-OF-PLANE OFFSETS REGULARITIES

Question 17

The vertical lateral-load-resisting elements
are not parallel to or symmetric about the
major orthogonal axes of the lateral force
resisting systems

Answer 17

NON-PARALLEL SYSTEMS IRREGULARITIES

Question 18

MITIGATION STRATEGIES

Answer 18

Symmetry
Stiffening the Structure
Retrofit Existing Buildings
Eliminate or Minimize Re-entrant Corners
Distribute Mass Evenly
Seismic Dampers