Steel Beam Design Flashcards

1
Q

What Eurocode governs steel design?

A

EC3

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2
Q

What is a variable action in steel design?

A

A live load or imposed load

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3
Q

What term replaces ‘loads’ in steel design?

A

Action(s)

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4
Q

What partial factors are used for steal beam loads?

A

The same as in concrete, 1.35 for dead loads & 1.50 for live loads

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5
Q

In loading for steel beams, the subscript G denotes…?

The subscript Q denotes…?

A

G = permanent action (dead load)

Q = variable action (live load)

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6
Q

How is ultimate loading calculated?

A

The same as normal, except with point loads and UDL’s considered.

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7
Q

How is bending moment calculated when there is a UDL and a point load in the centre of the beam?

A

( WL^2 / 8 ) + ( PL / 4 )

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8
Q

How is shear force calculated when there is a UDL and a point load in the centre of the beam?

A

( WL / 2 ) + ( P / 4 )

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9
Q

What is Med in steel beam design?

A

The max bending moment of a steel beam

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10
Q

What is Ved in steel beam design?

A

Max shear force in the steel beam

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11
Q

How is the thickness of steel grade decided?

A

Using the grade of steel given in the question and Table S1

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12
Q

How is W (plastic modulus) required calculated?

What units should this be in?

A

Med / Fy

Cm^3

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13
Q

How is W obtained?

A

Using the required value (cm^3), choose the closest, but greater value to the required, from the ‘Interactive Blue Book’

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14
Q

Where are the section properties from the steel beam selected?

A

Section properties are found from the interactive blue book, based on the W used value

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15
Q

Where is the epsilon value (curvy E) obtained?

A

Table S2

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16
Q

How is local buckling, c, in the outstanding flange calculated?

A

c = ( b - Tw - 2r ) / 2

17
Q

How are the flange and web classified?

A

Using the c value calculated (flange) and the d value (web) from the ‘interactive blue book’ in combination with table S3

18
Q

What is the overall classification if both flange and web are class 1?

A

Overall cross-section classification is class 1

19
Q

How is the formula for bending resistance of a cross-section chosen?

A

Using table S4 in combination with the class of the cross-section

20
Q

When calculating bending resistance, what units are produced?

What is Ymo equal to?

A

Nmm

1.0 (from UK national annex)

21
Q

How is bending tested?

A

Bending resistance must be greater than Bending action (Med)

22
Q

In shear resistance of a cross-section, where is Av obtained from?

A

Part 3A of table S5

23
Q

What value must Av not be less than?

A

N x Hw x Tw

24
Q

How is shear resistance of cross-section tested?

A

It must be greater than the maximum shear action (Ved) calculated.

25
Q

How is deflection tested?

A

Actual deflection must be less than permissible deflection

26
Q

In actual deflection, what must be different in load calculations?

A

They must remain unfactored