Composite Sections

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sirwan
Posts: 14
Joined: Wed Mar 06, 2013 8:53 am
Location: Sahand University of technology

Composite Sections

Post by sirwan » Wed May 15, 2013 10:36 pm

Hi
I have some questions regarding defining a composite section using fiber section command
1-When I define the geometry of the section using patch command, should I give the coordination of nodes according to the local axes (located at the geometric center) of the whole section, or I need to define it based on the actual local axes which is shifted away from the geometric center of the section due to the different materials used for the patches? (Does OpenSees automatically consider the effect of different materials and calculates the real position of principle axes or not?)
2- how the local axes of a section are arranged in a 2d frame? which one is the main?

fmk
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Re: Composite Sections

Post by fmk » Thu May 16, 2013 11:25 am

1. do either, results will be the same.
2. bending about yy

sirwan
Posts: 14
Joined: Wed Mar 06, 2013 8:53 am
Location: Sahand University of technology

Re: Composite Sections

Post by sirwan » Fri May 17, 2013 11:34 pm

great! thanks so much!

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