An unsymmetrical flexural member consists of a %x14 in. top flange, a %10 in.bottom flange, and a ¾×20 in. web.(a) Determine the distance y from the top of the shape to the horizontal plastic neutral axis(P.N.A.).(b) If A572 Grade 50 steel is used, what is the plastic moment Mp for the horizontal P.N.A.?(c) Compute Zy, the plastic section modulus with respect to the minor principal axis.(d) Calculate the ratio of Z,/S,. (Note: S, is the (elastic) section modulus with respect to theminor principal axis.

given:A572 Grade 50 steelLet us assume, Yield strength (Fy) = 345 MPa (50 ksi)Moment of inertia (I)…

An unsymmetrical flexural member consists of a %x14 in. top flange, a ¾×10 in. bottom flange, and a ¾x20 in. web. (a) Determine the distance y from the top of the shape to the horizontal plastic neutral axis (P.N.A.). (b) If A572 Grade 50 steel is used, what is the plastic moment M, for the horizontal P.N.A.? (c) Compute Zy, the plastic section modulus with respect to the minor principal axis. (d) Calculate the ratio of Z/S,. (Note: S, is the (elastic) section modulus with respect to the minor principal axis.

An unsymmetrical flexural member consists of a %x14 in. top flange, a ¾×10 in. bottom flange, and a ¾x20 in. web. (a) Determine the distance y from the top of the shape to the horizontal plastic neutral axis (P.N.A.). (b) If A572 Grade 50 steel is used, what is the plastic moment M, for the horizontal P.N.A.? (c) Compute Zy, the plastic section modulus with respect to the minor principal axis. (d) Calculate the ratio of Z/S,. (Note: S, is the (elastic) section modulus with respect to the minor principal axis.

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter5: Beams

Section: Chapter Questions

Problem 5.2.2P

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