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When plastic analysis is used, the yield stress of grade of steel used shall not exceed _____

(a) 250 MPa

(b) 500 MPa

(c) 450 MPa

(d) 800 MPa

The question was posed to me by my school teacher while I was bunking the class.

The origin of the question is Methods and Assumptions of Analysis topic in portion Structural Analysis, Loading and Load Combinations of Design of Steel Structures

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Correct answer is (c) 450 MPa

The explanation: When plastic analysis is used, the yield stress of grade of steel used shall not exceed 450 MPa and the stress strain distribution of steel shall not be significantly different from those obtained for steels complying with IS 2062.

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