Thank you very much Doug. That was it. Just an unit error. :D I got the code working and have launched it too. The stresses and deflections that I am getting are right on with structural calculation software.
I really appreciate you all helping me out on this project.
Archie264, thank you for the information. I will look into that in detail and see if that helps.
SteelPE, I did not understand you. When you say elimination of the horizontal component of the support, which support are you referring to? Are you talking about the top beam sitting on top of the...
winelandv, I have taken the axial stiffness of the braces into account. I probably could have ignored and nullified the flexural stiffnesses of brace but I left it in there as those are so little and are not changing the global stiffness matrix by very much.
bookowski, our support structure...
SteelPE, This is a statically indeterminate structure. So the reactions cannot be calculated by just using statics. That is why I am having to use this direct stiffness method.
JAE, I am not a student. I am trying to develop this spreadsheet so that anybody can figure out the approximate...
@SteelPE, bracing or unbracing would affect the reaction force wouldn't it? Because it changes the overall stiffness of the structure. What do you mean when you say "satisfy equilibrium"? The reactions are equal to the sum of the loads. Is that what you meant?
@BigInch, my brace is a full...
Hi everyone!
I am trying to develop a spreadsheet that calculates reaction forces for a simple braced frame using direct stiffness method. I did the regular process of
Calculation of stiffness matrix in local coordinate
Calculation of stiffness matrix in global coordinate
Calculation of...
I just checked. The beam is a physical member. So it should be picking up the internal joint. I have tried running a model merge. It shows that the number of nodes merged is always zero.
If the joints were really not on the centerline of the member, it would not even act as a pinned joint; am...
Ok Thanks Josh. I have attached a picture to make it clear (please click on the link). The member I'm dealing with is one continuous beam with two nodes N1 and N2. There actually are no intermediate nodes on the member where it connects to the plates (plates form the three pipes). So the only...
I created a model using plates and members. I need to know what the type of connection (fixed or pinned exists where the plate nodes interfere with the a member. I want it to be fixed. But it seems like it is acting like a pinned joint. I double clicked on the plates to see the type of joints...
