Steel Design

30問 • 1年前

問題一覧

In structural steel design, structures carrying live laid which induced impact, the assumed live load shall be increased sufficiently to provide for it. If not otherwise specified, the increase for supports of elevators shall be:

100%

Based on the AISC, what is the maximum slenderness ratio kL/r for tension members?

300

The slenderness ratio of compression members shall not exceed:

200

A wide flange section is used as a beam to carry a total shear of 900 kN. If the depth of the wide flange section is 600mm determine the required web thickness. Fy = 250 Mpa.

15 mm

The point on the cross-section of a member where a transverse load must pass to minimize visiting

Shear center

The maximum size of fillet weld that may be used along edges of materials less than 6mm thick:

Not greater than thickness of material

The maximum size of fillet weld that may be used along edges of materials 6mm or more in thickness

Not greater than thickness of material less 1.6mm

It is the sidewise bending or displacement accompanied by twisting about minor or weaker axis usually at the compression section.

Buckling

Riverted and bolted splice and gusset plates and other connection fittings subject to tensile force shall be design in accordance with AISC requirements where the effective net area shall be taken as the actual net area except that, for the purpose of design calculations, it shall not be taken as greater than __.

85% of gross area

Roof live loads shall be assumed to act:

Vertically upon the area projected on the horizontal

The Euler Column Formula for finding the critical load on a long column is Pcr = π2 EI/L2 where L is the effective length of the column. For a column hinged at the top, fixed at the bottom and 20 inches high, the critical load is equal to:

Pcr = π2 EI/196

The shear strength of a steel I-beam is dependent on the

Area of web

The allowable stresses for tension in structural steel in terms of gross area is:

0.60 Fy

The allowable stresses for tension in structural steel terms of effective net area is:

0.50 Fu

It is an imaginary distance from the centroidal axis at which the entire area can be assumed to exist without affecting the moment of inertia

Radius of gyration

A wide-flange section W21x32 weighs __ kg/m

123

A wide-flange section W21x83 has an overall depth of approximately __ millimeters

530

In computing net area, the width of a rivet or bolt hole shall be taken as __ mm greater than the nominal dimension of the hole normal to the direction applied stress

1.6

It is the ability of a material like steel to undergo large inelastic deformation without failure.

Ductility

For relatively short fittings such as splice or gusset plates used as statically loaded connecting elements, the net area An shall not exceed __% of the gross area Ag

Modulus of Elasticity of structural stell in MPa

200,000

It is also known as the second moment of area

Moment of inertia

Steel is an alloy comprising of two elements. They are __ and __.

Carbon & iron

This type of fastener is installed by heating to a light cherry-red color, inserting it into a hole and then applying pressure to the preformed head while at the same time squeezing the plain end to form a rounded head

Rivet

The allowable bending stress of a non-compact channel section bent about their weaker axis is taken __Fy

0.60

It is a roof beam spanning between trusses or rigid frames subjected to flexure or bending

Purlin

The allowable bending stress of a compact wide-flange section bent about their weaker axis is taken __ Fy

0.75

The maximum bending moment for a purlin may be taken as:

wL2/8

What is the weight of 32mm diameter deformed steel bar 9m long? Weight of steel = 7850 kg/cu.m.

56.87 kgs

What is the weight of 40mm diameter deformed steel bar 1m long?

9.56 kgs

BU2 Quiz 100

Mat · 30問 · 1年前

BU2 Quiz 100