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Hiner Videos Flashcards

1
Q

What can you assume about soil classifications if it is not given in the problem?

A

Assume it is Soil type D

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2
Q

is it possible to have 0% damping?

A

no every structure has some damping

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3
Q

How do soil types affect the structure period?

A

the softer the soil is, the longer it takes for maximum spectral acceleration to occur in the range

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4
Q

what happens as damping ratio increases?

A

the curve flattens on the average response spectrum

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5
Q

what design methods are acceptable according to the IBC/CBC?

A

Strength Design, load and resistance factor design, allowable stress design

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6
Q

what chapter is the site class and SDC information found in?

A

Chapter 3

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7
Q

what are seismic force resisting elements?

definitionof force resisting element

A

elements that can resist the vertical and horizontal forces of a seismic force

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8
Q

what is story drift?

formula wise

A

it is the difference between the deflection at the top and bottom of the story under consideration

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9
Q

what is p-delta?

A

when a structure undergoes lateral deformation, changing the position of the applied vertical gravity loads, causing additional forces, moments, and displacemtns

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10
Q

what is the simplified design procedure?

A

it is a more simple version of the ELF procedure but ALL conditions must be met in order to use these equations

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11
Q

what is the simple equation for seismic load effects?

A

E=Eh+Ev

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12
Q

what SDC is given to nonstructural components?

those attached to structures

A

they are given the same SDC as the structure they are attached to

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13
Q

what are nonbuilding structures?

A

structures supported by the earth and are self supporting structures

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14
Q

what type of structures are tanks and vessels considered?

A

fluid structures

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15
Q

what is the coefficient for diaphragm force?

A

Fpx

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16
Q

what is assumed about diaphragm weight during the exam?

A

Wpx=Wx

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17
Q

what is the good samaritan immunity?

A

write this in

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18
Q

how do you determine the r value for a structure with 2 different design categories?

A

when the upper system has a lower R, the design coefficients for the upper system shall be used for BOTH systems

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19
Q

how do you determine R for design in seismic loads that are in the SAME direction?

A

your design R value cannot be larger than the smallest R value under consideration

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20
Q

when dealing with the orthogonal combination procedure, what happens to the forces and their directions?

A

the forces become split up depending on the direction they are applied in. so the direction in which forces are applied is felt 100% and forces perpendicular to the applied are felt and split by 30% ie 100% E-W and 30% NS concurrently

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21
Q

when solving a problem with x bracing, what should you find?

A

it is important to find the length of the diagonal brace

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22
Q

what will happen t your SDC if you have a risk category IV building with a S1 greater than 0.75

A

you will classify the structure as a SDC=F

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23
Q

when solving for Cs, what do you need to check for?

A

you will need to plug in the SDS and SD1 value into its respective equation and use the smaller Cs value from either equation

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24
Q

what is a bearing wall system?

A

a system with bearing walls that support all or major portions of the vertical/gravity loads. shear walls provide seismic force resistance.

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25
what is the definition of a shear wall?
shear panel walls that resist lateral loads and do not support gravity loads
26
what is a building frame system?
a structural system WITH an essentially complete space frame that provides support for gravity loads. seismic force resistance is provided by shear walls or braced frames
27
what kind of loads do braced frames support?
they resist lateral loads while the bracing DOES NOT support gravity loads
28
what is a moment resisting frame system?
a structural system with an essentially complete vertical load carrying frame providing support for vertical gravity loads
29
how does a moment resisting frame resist loads?and what is an example of this system?
provides resistance to lateral loads primarily by flexural action of members. ie beams and columns
30
what is a dual system?what direction do they resist in?
structural system that essentially combines a building frame system and a moment resisting frame system. dual systems resist lateral loads IN THE SAME DIRECTION
31
what is the equation for the lateral seismic force? Fx
Fx=Cvx*V Cvx = vertical distribution factor and V = seismic base shear
32
what is the equation for Cvx?
Cvx = wx*(hx)^k / (sum of wi*hi^k) Cvx = weight and height of one floor / total sum of weight of each floor * height from base to each floor to the power of k
33
what is the equation for Vx
Vx = the sum of vertical seismic forces Vx = (V*Cv1) + (V*Cv2) etc
34
what is the OTM on the roof?
OTM on the roof is zero
35
when finding the horizontal force in nonstructural seismic forces, what must you do?
you need to calculate both the min and max value and make sure the actual seismic force is between those values
36
when finding the wall anchorage force when can you not include anchor spacing into the wall weight equation?
when you have paraphets and they do not include the anchor spacing in the given information
37
what is the difference between non-building structures similar to buildings and non-building structures NOT similar to buildings?
non-building structures NOT similar to buildings are supported by the Earth whereas the other nonbuildings structures are a part of the building most times
38
what is Fx?
Lateral force - chapter 5
39
what is Fpx?
diaphragm force - ch 6
40
what is Fp?
anchorage force - ch 7
41
what is the difference between a rigid diaphragm and a flexible diapgrahm?
a rigid will deflect under seismic loads while a flexible wont
42
how does diaphragm force carry on a structure?
it is a distributed weight over the roof
43
what type of loads do horizontal diaphragms resist?
ONLY designed to resist lateral loads therefore only earthquake loads
43
whats another word for flange?
chord
44
what does a chord do?
it resists bending of the beam
45
what are collectors?
they are designed to transmit the horizontal diaphragm reactions to the shear walls
46
what can you plug in, in place for Qe?
Qe can be many things but you can use drag force Fd in its place
47
what is the center of rigidity/rotation?
the location of the resultant reaction, and the location where the building will rotate and pivot
48
what is the formula for the center of mass?
the sum of all component's weight times their location in the X or Y coordinates divided by the sum of all weight
49
why is plywood so strong?
it is strong because it has layers of wood veneer and each layer's grain travels in a different direction meaning it can resist loads in all directions
50
what is the purpose of subdiaphragms in a building with masonry or concrete structural walls?
to transfer the out of plane anchorage forces to the primary diaphragm struts and the main horizontal diaphragm
51
what is the formula for max shear?
formula for max shear is V=wx*L/2
52
when i have a problem that requires me to check the rquired spacing, what steps should i take to solving the problem?
i should go to the table and plug in all of the values for the given plywood until i find the strength that satisfies the given
53
what are x, k, v, and inverted v bracing?
steel braced frames
54
when you hear punching shear, what should you think of?
flat slabs
55
what causes out of plane wall damage?
lack of vertical reinforcement
56
what are steel jackets?
item used to retrofit concrete bridges
57
what chapter contains any liquefaction information?
chapter 13
58
when finding the rigidities of walls what is an additional step you must do to find all rigidities?
you must all add the rigidities for the walls. even the ones that are not explicitly stated due to the height : depth ratio
59
when do you find the roof unit shear?
when finding the drag force in flexible diaphragm
60
in what direction is the force in chord forces applied?
chord force is applied PERPENDICULAR to the direction in which force is applied
61
what is the equation for Qe?
Qe is equal to the seismic force (V) / length of support

Seismic (1 decks)

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