NCEES Problem 601(a)

Professional Engineer & PE Exam Forum

Help Support Professional Engineer & PE Exam Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
K

Kamba

Active member
Joined
Dec 13, 2013
Messages
37
Reaction score
5
Location
Fort Lauderdale, FL
in NCEES problem 601(a) to design a CMU for axial and flexure, the solution used an interaction equation for combined stresses (Pu/phi.Pn + Mu/phi.Mn). I haven't seen such interaction equation in before in concrete or masonry codes or textbooks. My understanding that this problem should be solved by finding the natural axis for the transformed section or using the interaction diagrams.
any thoughts?

 
Yes there are interaction equations for masonry and concrete. I can provide references when I get home from work. The interaction diagrams are based on the interaction equations.

 
Last edited by a moderator:
linear interaction equations similar to the one used in that problem are valid if the section is un-cracked. when the section is cracked you end up with the interaction diagrams and not just a single line because it accounts for the change in NA location based on the applied moment (tension) and the cracked section.

 
Dont over think it buddy. Just make sure you have the correct load combination a long with the correct checks per MSJC 13. Make sure you have jot down out-of-plan procedure and in-plan procedure for CMU. 

Remember you have to show like you know what you are doing, dont get into the weeds too much. make sure you get the overall concept of things. 

 

Similar threads

AEI
AEI - Live Webinars for the Civil PE CBT Structural Depth Review Class - Starting August 21, 2022, Taught by Dr Ahmed Ibrahim and Dr Foued Zayati
Replies
0
Views
1K
AEI
AEI
A
NCEES Civil PE Reference Manual Lacks Info
Replies
0
Views
2K
AMP2319
A
A
Suggestions for Passing SE Exam Part 2 – by Andy Liu
Replies
2
Views
4K
andyliu
A
A
Suggestions for Passing SE Exam Part 1 – by Andy Liu
Replies
1
Views
5K
Serg305
S
AEI
AEI - Live Webinars for the Civil PE CBT Structural Depth Review Class - Starting Feb. 20, 2022, Taught by Dr Ahmed Ibrahim and Dr Foued Zayati
Replies
4
Views
2K
AEI
AEI

Latest posts

Back
Top