My goal is to simulate a non-standard bracing to see whether its behavior is still comparable to the standard one and acceptable. But I realize I can't do this with FM-2D.. Is there a plan to implement free bracing definitions (basically the ability to define any configuration of structural elements)? Or is there some software where one can freely draw the frame, specify the parameters of each element, and get a simulation?

@amaelkady
Hi,

Two questions:
In subroutine Spring_IMK_RC.tcl:
https://github.com/amaelkady/FM-2D/blob/master/src/Spring_IMK_RC.tcl

1.Ke is not modified by (n+1) !
2.lambda is not multiplied by theta_p !

Hello Prof. Elkady,

I have two questions about the SMF model in this repository:
(1) In the Spring_IMK.tcl (line 89), why do we need to correct rotations to account for elastic deformations?

set theta_y [expr $My/(6 * $E * $Ix / $L)];
set theta_p [expr $theta_p - ($McMyP-1.0)*$My/(6 * $E * $Ix / $L)];
set theta_pc [expr $theta_pc + $theta_y + ($McMyP-1.0)*$My/(6 * $E * $Ix / $L)];

If we follow the notation in the Appendix B of Ibarra (2005), does that imply that the response parameter (e.g., $\theta_p$) obtained from the regression equation (lines 78 & 79) actually corresponds to $\theta_{p,mem}$ instead of $\theta_{p,spring}$? If so, then it's necessary to eliminate the elastic beam-column term $\theta_{bc}$ to ensure that the sub-elements are connected in series and have the correct assembled member parameters. However, if it is the case, should we use (n+1)/n *6 * $E * $Ix / $L instead of 6 * $E * $Ix / $L for $K_{bc}$?

(2) In SMF4B.tcl (line545), what is the reason or reference for defining gravity frame element damping using $a1_mod/10?

region 3 -eleRange 900000 999999 -rayleigh 0.0 0.0 [expr $a1_mod/10] 0.0;

Thank you!
Best, YHY

Greetings Mr. Elkady, I am trying to replicate the example shown in the videos, but I keep getting this error:

Error Identifier: MATLAB:cd:NonExistentFolder
Error Message: Cannot CD to C:\Users\Acer Nitro 5\Desktop\MRF_Example\Results\120111 (Name is nonexistent or not a directory).

Error Location:

Line 5 in Read_Analysis_Data
Line 119 in Run_OpenSEES
Line 64 in Execution_Commands
Line 306 in FM2D_App.RunModelButtonPushed

Thanks in advance.

Hello Professor,
Thank you for your great work
I ran into a problem. When I click on the "Get Period" button, I get this error:

Error Identifier:   MATLAB:cd:NonExistentFolder
Error Message:      Unable to change current folder to 'D:\Users\Farid\Desktop\fm2D-example\Results' (Name is nonexistent or not a folder).
--------------------------------------------------
Error Location:
----------------
Line   98 in Get_Mass_and_Period
Line  433 in FM2D_App.GetperiodButtonPushed

Program runned as admin
MATLAB Runtime version: R2022b

Dear Dr. Elkady

Thank you very much for this useful tool. I am wondering if it is possible to view the functions EXE file, specifically run_OpenSEES.m file?

Best regards,
Zakariya