1. Determine whether a W14x90, A992 column with a length of 12.5 ft is adequate in a braced frame to carry the following loads from a first-order analysis: a compressive dead load of 100 kips and live load of 300 kips, a dead load moment of 30 ft-kips and live load moment of 70 ft- kips at one end, and a dead load moment of 15 ft-kips and a live load moment of 35 ft-kips at the other. The member is bending in reverse curvature about the strong axis. Determine by (a) LRFD and (b) ASD.

1. Determine whether a W14x90, A992 column with a length of 12.5 ft is adequate in a braced frame to carry the following loads from a first-order analysis: a compressive dead load of 100 kips and live load of 300 kips, a dead load moment of 30 ft-kips and live load moment of 70 ft- kips at one end, and a dead load moment of 15 ft-kips and a live load moment of 35 ft-kips at the other. The member is bending in reverse curvature about the strong axis. Determine by (a) LRFD and (b) ASD.

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

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter10: Plate Girders

Section: Chapter Questions

Problem 10.7.7P

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Question

Looking to get help calculating #7.

1. Determine whether a W14x90, A992 column with a
length of 12.5 ft is adequate in a braced frame to carry the
following loads from a first-order analysis: a compressive
dead load of 100 kips and live load of 300 kips, a dead
load moment of 30 ft-kips and live load moment of 70 ft-
kips at one end, and a dead load moment of 15 ft-kips and
a live load moment of 35 ft-kips at the other. The member
is bending in reverse curvature about the strong axis.
Determine by (a) LRFD and (b) ASD.

7. Reconsider the column and loadings in Problem 1 if
that column were bent in single curvature by (a) LRFD
and (b) ASD.

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Step 1: Introduce the problem statement

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Step 2: Determine unfactored and factored load

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Step 3: Section strength from AISC databse

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Step 4: Determine B1 and Cb for LRFD

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Step 5: Chek for adequacy of section using LRFD

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Step 6: Determine B1 for ASD

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Step 7: Determine Cb for ASD

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Step 8: Chek for adequacy of section using ASD

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