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Flashcards in Unit 2 Review Deck (23)
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1
Q

What are the two basic types of trusses?

A
  • Pitched or common truss (triangular shape)

- Parallel chord or flat truss (used in floor systems)

2
Q

What are the structural members that connect the top and bottom of trusses called?

A

Webs

3
Q

What are the spaces within the web of a truss called?

A

Panels

4
Q

What are two common materials used for trusses?

A
  • Wood

- Steel

5
Q

A truss acts like a _______ _______.

A

Deep beam

6
Q

True or false: a truss can have point loads applied to any part of its length

A

False. They can only have point loads applied to its nodes or connecting pins.

7
Q

Why are trusses stronger than beams?

A

Because of the wide separation between their top and bottom chords.

8
Q

Are trusses statically determinate?

A

Yes

9
Q

What do frames usually consist of?

A
  • Post and beam systems, or

- Wall and slab systems

10
Q

What makes a rigid frame different than a post and beam frame?

A

Rigid frames make use of fixed joints or moment connections, rather than having connections that are free to rotate.

11
Q

True or false: frames are good are resisting lateral loads.

A

False. They are only good at resisting vertical loads.

12
Q

What are four ways to provide lateral resistance in frames?

A
  • Fixing the base of each post
  • Connecting the post and beam rigidly (as in the legs of a table)
  • Using knee or cross bracing
  • Using a sufficiently rigid infilling panel
13
Q

What is a gabled frame?

A

A frame in which two beam elements are joined at the top of the gable peak

14
Q

What is a moment connection?

A

It is a connection joint between a beam and column where the end of the beam is restrained from rotating

15
Q

What are plates? (3)

A
  • They are flat (planar) structures
  • usually make of monolithic (consisting of one piece) material,
  • whose depths are small compared to other dimensions
16
Q

What material is most commonly used for structural walls and plates?

A

Reinforced concrete

17
Q

What two structural properties are much greater in folded plates than flat plates? (2)

A
  • Stiffness (in carrying vertical loads)

- Span capacity

18
Q

What are sandwich panels?

A

A panel that has flat plates on both ends and a folded plate in the middle

19
Q

What loads do folded plates carry? (2)

A
  • Bending

- Shear

20
Q

What is the maximum deflection for beams?

A

L/360

21
Q

What is the maximum detectable deflection for beams?

A

L/180

22
Q

What are the four factors that affect column buckling?

A
  • Column end restraints
  • Material
  • Cross-sectional geometry
  • Column length
23
Q

True or false: do columns buckle before they reach their ultimate material strength?

A

True