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Steel-structures Questions Set 14:

Quiz Mode

What is the value of the imperfection factor for buckling class a?

0.45

0.21

0.31

0.75

Solution:

What is the hinged length for a simply supported rectangular beam of span L with a central concentrated load?

L/√3

√3/L

L/5

L/√2

Solution:

What causes web crippling in structural beams?

Excessive bending moment

Failure of web under point loads

Width of flanges

Column action of web

Solution:

A steel plate is 30 cm wide and 10 mm thick. A rivet of nominal diameter 18 mm is driven. The net cross-sectional area of the plate is

18.00 cm²

28.20 cm²

28.05 cm²

32.42 cm²

Solution:

Which of the following is not a parameter that can decrease the strength of a slender member?

Variation of material properties

Residual stress

Initial lack of straightness

Seismic load

Solution:

An equal angle of cross-sectional area A has been attached to the support by means of a lug angle. If the allowable stress in tension is f, what is the load carrying capacity of the member?

0.5fA

0.9fA

0.85fA

1.0fA

Solution:

For two plates of equal thickness, the maximum size of a full strength fillet weld with a square edge is limited to:

1.5 mm less than the thickness

75% of the thickness

80% of the thickness

the thickness of the plate

Solution:

A steel rod of 16 mm diameter has been used as a tie in a bracing system, but may be subject to possible reversal of stress due to the wind. What is the maximum permitted length of the member?

1000 mm

1200 mm

1400 mm

1600 mm

Solution:

Which of the following statements is true regarding residual stresses?

Residual stresses result in local early strain hardening

Residual stresses increase the plastic range of a member

Residual stresses are not important when fatigue is involved

Residual stresses improve the strength of a member

Solution:

An SMB 100 column (r_x = 40 mm, r_y = 10 mm) has been used in an industrial shed. Along the minor axis, the column has restraints in the form of purlins at 1.0 m intervals. The effective length factors along the major and minor axes are 1.2 and 1.0, respectively. If the slenderness ratio is restricted to 120, what is the maximum column height?

1.2 m

2.4 m

3.6 m

4.8 m

Steel-structures Questions Set 14:

What is the value of the imperfection factor for buckling class a?

Solution:

What is the hinged length for a simply supported rectangular beam of span L with a central concentrated load?

Solution:

What causes web crippling in structural beams?

Solution:

A steel plate is 30 cm wide and 10 mm thick. A rivet of nominal diameter 18 mm is driven. The net cross-sectional area of the plate is

Solution:

Which of the following is not a parameter that can decrease the strength of a slender member?

Solution:

An equal angle of cross-sectional area A has been attached to the support by means of a lug angle. If the allowable stress in tension is f, what is the load carrying capacity of the member?

Solution:

For two plates of equal thickness, the maximum size of a full strength fillet weld with a square edge is limited to:

Solution:

A steel rod of 16 mm diameter has been used as a tie in a bracing system, but may be subject to possible reversal of stress due to the wind. What is the maximum permitted length of the member?

Solution:

Which of the following statements is true regarding residual stresses?

Solution:

Solution:

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