×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

# Contact US

Log In

#### Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
To Your Posts
• Keyword Search
• One-Click Access To Your
Favorite Forums
• Automated Signatures
On Your Posts
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

# RISA Glulam Arch Design

 Forum Search FAQs Links MVPs

## RISA Glulam Arch Design

(OP)
I'm designing a structure with glulam arches @ 4'-0" o/c along the longitudinal axis. I've created my model using the continuous arc template with 10 arc increments. After loading each arc with gravity load and running the analysis, the program is not treating the entire member as continuous. Instead it is splitting up each member between the arc nodes and the moment and shear output resembles a SSB. Any help?

*First time RISA user by the way

### RE: RISA Glulam Arch Design

Yes, RISA doesn't have a curved member. Instead, it is modeled as a series of straight member that approximate the curve. Why do the axial, shear and moment diagrams look a little discontinuous / disjointed? Well, each segment gets it's moment and shear diagram plotted based on the local axis of that segment. Right? These local axes don't quite line up and the shear (or axial force) in each segment has a slightly different meaning.

The shorter the segments, the more "continuous" the moment and shear diagrams will you plot them together on screen. Sometimes, I will created multiple copies of the same curved beam side by side with the same loading, but with a different number of members to approximate the curve.

I do this so that I can compare the results. Max moment, max shear. End reactions. Code checks, et cetera. Just to see how many members I should use when generating the curved beam.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

### Reply To This Thread

#### Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!

Already a member? Close this window and log in.