問題一覧
1
within proportional limit, the stress is directly proportional to strain
hooke's law
2
the portion of the stress strain curve beyond which the stress is no longer proportional to the strain
proportional limit
3
the material composition is the same but it's mechanical properties are diff in every direction
orthotropic material
4
refers to the lateral displacement of one level relative to the other level above or below
storey drift
5
the ability of the material to absorb energy and plastically deform without fracturing
toughness
6
which of the following best refers to the rigidity of a structure
reciprocal of deflection
7
forces generated by a bodies in motion
dynamic
8
a Richter scale measures ______ of an earthquake
magnitude
9
the ability of a deformed material body to return to its original shape and size when the forces causing the deformation are removed
elasticity
10
what will develop if the center of mass and center of rigidity of a structure does not coincide?
torsional shear stress
11
a time dependent prestress loss in pretensioned concrete
relaxation
12
the points through which resultant of the resistance to the applied lateral force acts
center of rigidity
13
materials having the same composition at any point are termed as
homogeneous
14
refers to the stress at which a material begins to deform plastically.
yielding
15
which of the following best describes liquefaction
sudden drop of shear strength
16
which of the ff describes the location of an earthquake besides epicenter.
focal depth
17
the ratio of lateral strain to longitudinal strain.
Poisson's ratio
18
tendons are stressed before concrete ir poured
pre tensioning
19
what does a seismometer measure?
components of ground motion
20
a material having the same strength at any point
homogeneous
21
which of the ff deals with forces at rest?
static
22
within elastic range, the slope of the straight line portion of the stress-strain curve.
Young's modulus
23
material property which enables it to under large permanent strains before failure
ductility
24
the ability of the material to absorb energy when it is deformed elastically, and release that energy upon unloading.
resilience
25
the ability of the material to deform under tensile stress
ductility
26
refers to the flexibility of a structure
reciprocal of stiffness
27
tendons are stressed after concrete is hardened
post tensioning
28
energy by virtue of velocity
kinetic
29
which of the ff forces determines whether a body will be at rest or in motion.
resultant
30
the point on a structure through which the applied seismic force acts
center of mass
31
if two springs with stiffness k1 and k2 are arranged in parallel
k=k1+k2
32
refers to the tendency of solid materials to return to their original shape after being forces is applied on them. when the forces are removed, the object will return to its initial shape and size.
elasticity
33
a building which has a floor which is less than 70% as stiff as the floor immediately above it, or less than 80% as stiff as the average stiffness of the three floors above it
soft storey