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GATE 2023 Design of Steel Structures Quiz 3

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Question 1

A steel plate 150 mm wide and 12 mm thick is connected to a plate using 3 bolts of 16 mm dia on a single line. The net area of the plate is

Question 2

Consider the following statements:

(i) Lug angles are used to reduce the length of the joint and size of gusset plate.

(ii) Splices are the tension members used to join two sections.

(iii) The splice section should be designed for at least 0.2 times the design capacity of member in tension.

(iv) When the lug angles are used to connect the members, the whole area should be taken as effective.

Which of the above statements are correct?

Question 3

A single angle section ISA 120*120*12 mm used as tie member in roof truss. The cross sectional area of angle is 2750 mm2 and major and minor moment of inertia of an each angle Izz=Iyy=368*104mm4.Iuu=584*104 mm4 and Ivv=151*104 mm4 respectively. Tie angle section may be subjected to possible reversal of stress due to loads other than wind or earthquake. The maximum length of the angle tie (in m) is

Question 4

Block shear failure

(i) is characterized by tearing of a segment of material at the end.

(ii) is prominent with the use of few lower strength bolts

(iii) occurs along a path involving tension on one plane and shear on perpendicular plane.

(iv) dominates when the connection length is smaller

Question 5

ISA 75 x 75 x 8 mm serves as tensile member. This angle is welded to a gusset plate as shown in figure. Assuming the yield strength of the steel to be 260 N/mm2 the tensile strength of the member can be taken approximately

Question 6

A single equal angle ISA 90 × 90 × 6 mm is connected to a gusset plate using 20 mm bolt. Rupture strength of angle will be _______ kN.

{Given, β = 0.9, Fe410}.

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