PSAD Q1

Question 1

Maximum stress a material can withstand before permanent deformation

Answer 1

Elastic Limit

Question 2

Occurs before plastic limit

Answer 2

Elastic Limit

Question 3

measure of stiffness of the spring

Answer 3

Spring Constant

Question 4

the resistance to deformation of a member or structure measured by ratio of applied force to the corresponding displacement

Answer 4

Stiffness

Question 5

the vertical members bearing horizontal force are located in the axis along the height of the structure

Answer 5

Out of Plane Offset

Question 6

the lateral displacement of the level relative to the level above or below

Answer 6

Story Drift

Question 7

Occurs when the structure’s center of mass does not coincide with its center of rigidity

Answer 7

Torsional Shear Stress

Question 8

any inside corners that form an angle of 180 or less. Creates high stress concentrations in a solid object

Answer 8

Re-entrant corners

Question 9

the increased strain or deformation of a structural element under constant load

Answer 9

creep

Question 10

decrease in length or volume of material from changes in moisture content or chemical changes

Answer 10

shrinkage

Question 11

the first stress in a material at which an increase in strain occurs without an increase in stress, this is less than the max attainable stress

Answer 11

yield point

Question 12

a fracture phenomenon resulting from a fluctuating stress cycle

Answer 12

fatigue

Question 13

stresses remain in an unloaded member after it has been formed into a finish product

Answer 13

residual stress

Question 14

phenomenon where in ductile steel, after undergoing considerable deformation or just above yield points

Answer 14

strain hardening

Question 15

the vertical members bearing horizontal force are located on another axis rather than its own axis continuing along the height of a structure

Answer 15

out of plane offset

Question 16

occurs when the structure’s period coincides with the earthquake period

Answer 16

resonance

Question 17

offset between the center of mass and the center of stiffness of a structure

Answer 17

Structural eccentricity

Question 18

measurement of the ability to absorb energy without fracture. Generally determined by impact loading of specimens containing a notch having a prescribed geometry

Answer 18

Toughness (Fracture Toughness)

Question 19

ratio of lateral deflection to the height of the building

Answer 19

drift index

Question 20

lateral deflection of a building

Answer 20

drift index

Question 21

buckling of a member involving lateral deflection

Answer 21

lateral (lateral-torsional) buckling