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Pua Mna kips Pn 800 700 Mob 600 500 400 300 200 100 Mnb Pub elevation - exterior joint 100 200 300 400 500 Mn ft-kips Column Interaction Diagram

Pua Mna kips Pn 800 700 Mob 600 500 400 300 200 100 Mnb Pub elevation - exterior joint 100 200 300 400 500 Mn ft-kips Column Interaction Diagram

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The rectangular reinforced concrete column shown is part of a special moment frame in a region of high seismic risk. The columns above and below the joint have the same cross section containing properly developed and confined concrete whose interaction diagram is shown below. Under factored gravity and seismic loads, the design axial compression forces on the columns are:

• Case 1: Pua = 260 kip, Pub = 320 kip

• Case 2: Pua = 55 kip, Pub = 100 kip

Find the maximum nominal moment strength of the beam permitted by ACI to alleviate plastic hinges forming first in the columns for the loading cases?

 

Pua Mna kips Pn 800 700 Mob 600 500 400 300 200 100 Mnb Pub elevation - exterior joint 100 200 300 400 500 Mn ft-kips Column Interaction Diagram
Transcribed Image Text:Pua Mna kips Pn 800 700 Mob 600 500 400 300 200 100 Mnb Pub elevation - exterior joint 100 200 300 400 500 Mn ft-kips Column Interaction Diagram
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