×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Thermal loads

Thermal loads

Thermal loads

(OP)
I've looked through the help, and website, and google.

How does RISA account for joint thermal loads? Can these be factored per ASCE in the TL basic load case? It doesn't seem there's a way to input a joint temperature and associate it with a load case.

I've been using the T uniform loads, which can be applied to a load case, but I would like to compare the results of a beam uniform temperature load to the results of the two beam nodes being at an elevated temperature.

Also, is there a way to apply joint temperatures without clicking on every joint and applying the load one at a time?

RE: Thermal loads

It appears that the joint thermal load listed is just used to determine the baseline (ambient) temperature of the structure. The program uses the start and end temperatures to determine an ambient temperature along the member. See loads - thermal loads in the RISA manual and Joint Coordinates spreadsheet in the RISA Manual.

You can use the joint spreadsheet to apply thermal loads to multiple joints in lieu of clicking on them individually.

RE: Thermal loads

RISA defines joint temperatures. Think of that as the temperatures of the unstressed state of the structure. Usually, I leave all the joints with a temperature = 0. Then I apply a member distributed load (with the direction = T for tmemperature) to members that will see expansion due to a temperature increase. I can do the same with plate surface loads as well. Leaving the baseline tempeatures as zero makes it easy to understand exactly what thermal loads you are applying to your members and plates.

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!


Resources