Recent content by mohamadh95

Consider a pencil. Now break it in 2. Do it again and it s obvious it gets harder to do it. Why is that? I thought of modeling the problems as a hinged beam with moments applied at both ends having opposite directions and same torque. So basically the length of the beam doesn't affect the moment...

I actually managed to find the solution. Consider the hinged joint as fixed in terms of rotation since the rotational degree of freedom of that joint is not free anymore.

I would like to know how to implement internal hinges in a program I'm developing. A hinge is created by changing the stiffness matrix of the beam. The problem is when two interconnected beams have a hinge at the same location, so basically we have a hinged joint, in this scenario I will obtain...

I did an example similar to the one above with less finite elements. Here are the displacement results for an example: The black rectangle was modeled with two triangular cst elements.

Hello. Consider the model shown below. The problem is to be solved by FEA. The plane element is constrained from moving at the red line. A concentrated load P is applied at the red point and pointing downward. We solve the problem using the following meshes. Same elements are being used and...

I've made a program with Mathematica that will compute the load along with the moments sustained by a concrete column given the stress block area and orientation(in other word the neutral axis center location and the angle it makes with the horizontal). However I am facing an issue with setting...

Thank you for your help.

Well I'm willing to make a program using Mathematica or a spreadsheet in excel in order to create the interaction curve of a column,so trial and error is no problem. Can you explain how shall I do it? Should I assume an initial N.A and then do the computations, and after that check if the...

How can the neutral axis of a concrete column under biaxial bending be determined. I mean if the load P is given along with the eccentricities ex and ey, how could the N.A. location and orientation be computed? Thank you.

If anyone is interested I took both and I found that probability was easy, but differential equations are really hard, harder than all the calculus courses.

Wait I think I got you wrong, you want to know the allowable deflection? You can find it in the construction codes like ACI.

Well if the beam is supposed to act in an elastic way like steel you can easily use the double integration method. If it's made out of concrete it will be a bit more complicated. If you want further information just ask again and I will reply.

This is the only way I could explain it, I express myself better with a pen and a paper, it's a shame

Well I'lll try to explain it with this picture

Well I'm considering a and b to be just scalars