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What is a plastic section?

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in Design of Steel Structures by (962k points)
What is a plastic section?

(a) cross section which can develop plastic moment

(b) cross section which can resist seismic force

(c) cross section in which buckling can occur

(d) cross section which can develop plastic hinges

The question was asked during an online interview.

My question is from Cross Sectional Classification in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

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Right answer is (d) cross section which can develop plastic hinges

The best explanation: Plastic or class I sections are cross sections which can develop plastic hinges and have a rotation capacity required for failure of structure by formation of plastic mechanism.

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