Question

Which of the following conditions are true for using plastic method of analysis as per IS 800?

(a) members shall not be hot-rolled or fabricated using hot-plates

(b) yield stress of steel should not be greater than 450MPa

(c) cross section should be unsymmetrical about its axis perpendicular to axis of plastic hinge rotation

(d) cross section of members not containing plastic hinges should be ‘plastic’ and those members containing plastic hinges should be ‘compact’

The question was asked in an online quiz.

Question is from General Requirements for Plastic Design and Plastic Hinge in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Answer 1

Correct choice is (b) yield stress of steel should not be greater than 450MPa

To explain: The following are conditions for using plastic method of analysis as per IS 800: (i) yield stress of steel should not be greater than 450MPa, (ii) members shall be hot-rolled or fabricated using hot-plates, (iii) cross section should be symmetrical about its axis perpendicular to the axis of plastic hinge rotation, (iv) cross section of members not containing plastic hinges should be ‘compact’ and those members containing plastic hinges should be ‘plastic’.