moving load in truss
moving load in truss
(OP)
Dear all,
I have build a truss model in RISA 3D V6. I applied a -1KN moving load along bottom chords and perform the envelop solution.
To my surprise, I found little Bending moment in bottom chords and huge amount of axial force in other members in contrast of just -1KN of applied load. I build this model to get maximum axial force on each member due to unit moving load. please check my model i am attaching here. Please comment if i do something wrong.
Thanks in advance
regards G
I have build a truss model in RISA 3D V6. I applied a -1KN moving load along bottom chords and perform the envelop solution.
To my surprise, I found little Bending moment in bottom chords and huge amount of axial force in other members in contrast of just -1KN of applied load. I build this model to get maximum axial force on each member due to unit moving load. please check my model i am attaching here. Please comment if i do something wrong.
Thanks in advance
regards G





RE: moving load in truss
I found that the above error was actually because of some problems in my version. Further i would like to know how we can apply distributed moving load in risa 3d.
thanks in advance
best regards
G
RE: moving load in truss
Running it in the current version (14.0.1) the results look like what I would expect. This current version has a number of new features related to moving loads but not a moving distributed load. These new features include:
◦Moving loads can now be included in a Batch + Envelope solution.
◦Added a feature to generate point loads per a specific moving load time step.
◦Envelope member detail reports
◦Moving Loads are now included in the input file, making the transfer of files from one computer to another easier.
◦Added the step location for moving load results to indicate where the moving load is located when it gives the reported results.
◦Updated the moving load animation with play/pause control.
◦Added the ability to view a specific moving load step in the moving load animation.
◦Added the AREMA Chapter 15 Cooper E-80 (Railway loading) to the moving loads database.
•Added the ability to print Response Spectra and Moving Load input data.
*Added the ability to record Moving Load Animations to a video file.
So, if you were to use the newer version of the program, my belief is that things would run a lot easier for you.
RE: moving load in truss
RE: moving load in truss
Mike McCann, PE, SE (WA)