You must be reading my mind. I was recently looking at this Mastan example of using DAM on a portal frame, and was going to compare it to RISA3D. I appreciate you doing it first!!
My pleasure Chris. My suggestion is when you complete your model, go ahead and compare it to mine and let me know if we've converged on the same solution. There's nothing like two engineers working independently on the same problems and coming up with the same answers. Peace.
@@capstonestructural7212 Yes, I came out with the same deflections keeping my convergence tolerance at 0.5. I am currently doing some research on how using the First Order Method with B magnification factors by hand or spreadsheet compares to the RISA3D model results. The structure is a large storage rack made up from cold formed tubular sections for the beams and posts. I like how RISA3D has the AISI code and members already in their database. However I did have to create some custom cold formed shapes too, which is relatively easy in RISA3D as well.
@@chrisaprile813 Glad to hear that we've converged on the same numbers. Also, it's good to know that you're studying the B1 & B2 Method in greater detail. From my readings, what I know is that after B2 exceeds about 1.7, that method becomes a bit unconservative; however, some of its unconservative effects are mitigated when Rm = 0.85. I tend to trash those approximate results when I hit the B2 limit and just go D.A.M. w/ 2nd order rigorous elastic analysis and subdivision of members all the way. Best Wishes on your work though! Please continue to share w/ the Engineering Community, Peace!
You must be reading my mind. I was recently looking at this Mastan example of using DAM on a portal frame, and was going to compare it to RISA3D. I appreciate you doing it first!!
My pleasure Chris. My suggestion is when you complete your model, go ahead and compare it to mine and let me know if we've converged on the same solution. There's nothing like two engineers working independently on the same problems and coming up with the same answers. Peace.
@@capstonestructural7212 Yes, I came out with the same deflections keeping my convergence tolerance at 0.5. I am currently doing some research on how using the First Order Method with B magnification factors by hand or spreadsheet compares to the RISA3D model results. The structure is a large storage rack made up from cold formed tubular sections for the beams and posts. I like how RISA3D has the AISI code and members already in their database. However I did have to create some custom cold formed shapes too, which is relatively easy in RISA3D as well.
@@chrisaprile813 Glad to hear that we've converged on the same numbers. Also, it's good to know that you're studying the B1 & B2 Method in greater detail. From my readings, what I know is that after B2 exceeds about 1.7, that method becomes a bit unconservative; however, some of its unconservative effects are mitigated when Rm = 0.85. I tend to trash those approximate results when I hit the B2 limit and just go D.A.M. w/ 2nd order rigorous elastic analysis and subdivision of members all the way. Best Wishes on your work though! Please continue to share w/ the Engineering Community, Peace!