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Structures designed using elastic analysis may be ______ than those designed using plastic analysis

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in Design of Steel Structures by (962k points)
Structures designed using elastic analysis may be ______ than those designed using plastic analysis

(a) lighter

(b) heavier

(c) of same weight

(d) almost half times the weight

This question was addressed to me by my school teacher while I was bunking the class.

Origin of the question is Plastic Theory in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

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The correct option is (b) heavier

The best explanation: In elastic design structures are designed for allowable stress level well below the elastic limit, whereas in plastic design structures are designed using ultimate load rather than yield stress, Hence, structures designed using elastic analysis may be heavier than those designed using plastic analysis.

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