User Guide

RISA-3D User’s Guide
Version 5.0
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The choices for Wood Design Code and Concrete Design Code are NDS 91:
ASD and ACI 99.
We will use the the default specifications for the tutorial, which are already
selected.
Use your mouse to select the Concrete tab.
The entries under the Concrete tab contain options related to the analysis and
design of concrete members.
The Shear Tie Options allow you to control the Number of Shear Regions that
will be used when detailing a beam or column span. It also allows you to specify
the increment that you’d like the program to use when increasing or reducing the
spacing of the shear ties.
The Biaxial Column Design Options controls which method will be used to
determine the biaxial column capacity. The options are the PCA Load Contour
Method and the Exact Integration Method.
Click on
to select this method for our design.
This method is more accurate than the Load Contour Method and does not require
you to make an estimate of the Parme Beta Factor.
The Concrete Stress Options allow you to choose what type of stress block to
consider in your analysis. The options are the constant Rectangular Stress Block
and the Parabolic Stress Block. Since the parabolic block is more accurate, we
will select this stress distribution for our design.
Click on to select it for our design.
Check the Used Cracked Sections box if you want to modify the member
stiffnesses by the Icr Factor. For more information refer to the General
Reference Manual.