PSAD Terminologies Flashcards
Stress at failure
a. Proportional Limit
b. Yield Strength
c. Ultimate Strength
d. Rupture Strength
d. Rupture Strength
Highest Ordinate in stress-strain diagram
Ultimate Strength
An appreciable elongation or yielding of the material without any corresponding increase of load.
Yield Strength
Displacement of one level relative to the level above or below.
Story Drift
Occurs when center of mass and rigidity do not coincide.
Torsional Shear Stress
If the structure is subjected to a cycle of stresses and ________, it causes the beam to have sudden ultimate structure.
Fatigue
If the structure is subjected to a load for a long period of time, it will continue to deform until a sudden fracture occurs.
Creep
A condition that when there is already a permanent deformation, it continues to deform when a minimal load is applied beyond the elastic range.
a. Resilience
b. Buckling
c. Plasticity
d. Elasticity
c. Plasticity
Refers to the large amplitude vibration of an object or system when given impulses at its natural frequency.
Resonance
Measured by Richter scale
Magnitude of Earthquake
Measured by seismometer
Actual displacement
Besides the epicenter, it describes the location of the earthquake
Focal depth
The composite material exhibits elastic properties in one direction different from that in the perpendicular direction.
Orthotropic
The material has the same composition at every point but the elastic may not be the same in all direction.
Homogeneous
Liquefication is best described as
a. A sudden drop in the shear strength of a soil
b. A decrease in pore water pressure of a soil
c. An increase in bearing capacity of a soil
d. An increase in effective stress of a soil
a. A sudden drop in the shear strength of a soil
Refers to the rigidity of a structure
a. Deflection
b. Reciprocal of Deflection
c. Product of Stiffness and Deflection
d. Reciprocal of Stiffness
b. Reciprocal of Deflection
It is the point through which the resultant of the resistance to the applied lateral force acts.
a. Center of Mass
b. Center of Gravity
c. Center of Rigidity
d. In-Plane Offset
c. Center of Rigidity
The point through which the applied seismic force acts.
a. Center of Mass
b. Center of Gravity
c. Center of Rigidity
d. In-Plane Offset
a. Center of Mass
Refers to the flexibility of a structure.
a. Deflection
b. Reciprocal of Deflection
c. Product of Stiffness and Deflection
d. Reciprocal of Stiffness
d. Reciprocal of Stiffness
One in which the lateral stiffness is less than 70% of the stiffness of the story above is called
a. Story Displacement
b. Soft Story
c. Lateral Drift
d. Story Drift
b. Soft Story
The material deforms considerably even with a slight increase in stress
a. Yielding
b. Strain Hardening
c. Fracture
d. Breaking
a. Yielding
The material regains its original dimensions when the load is removed.
a. Resilience
b. Buckling
c. Plasticity
d. Elasticity
d. Elasticity
The material deforms in the plastic range without breaking.
a. Elongation
b. Ductility
c. Resilience
d. Stiffness
b. Ductility
The distance between the center of rigidity and center of mass.
a. Deflection
b. Drift
c. Pitch
d. Eccentricity
d. Eccentricity
The material has the ability to absorb energy in the plastic range.
a. Toughness
b. Brittleness
c. Stiffness
d. Resilience
a. Toughness
The material has the ability to defuse the plastic range without breaking.
a. Toughness
b. Ductility
c. Stiffness
d. Resilience
b. Ductility
The material has the ability to absorb energy in the elastic range.
a. Toughness
b. Brittleness
c. Stiffness
d. Resilience
d. Resilience
