About My Graduation Thesis

[arifayabakan]

Hello. I am disturbing because I want to get your comment about the graduation thesis position. Graduation thesis location; I will write a software in C#. Angle value will be entered into the program, these angles; There will be angles of "0-7.5-15-22.5-30-37.5-45-52.5-60-67.5-75-82.5-90". I was asked to write a software that would give the P, My and Mz values of those angle values in the P-My-Mz diagram, that is, the onion. I wanted to consult you on how to do this, how to make my job easier, because I am trying to find a solution. Thank you very much in advance for your answer.

 

[oguzcan]

Hello, Regardless of the programming language in which you will write the software; First you need to have a function that outputs a moment curvature relationship. If it will be a reinforced concrete section, a moment-curvature relationship can be derived according to the material models of the concrete and reinforcement. However, this will be one-way. For this reason, the neutral axis should be rotated at the angles you wrote below with respect to the local axes of the section and then you need to extract the moment curvature relationship again. This moment of curvature relationship will give you the moment of yield and moment of collapse. For each angle value, the yield moment at certain normal forces must be found and marked on the graph. then by taking their projections M2 and M3 (My-Mz) moments can be found. Then, they can be combined and the onion curve can be easily drawn. However, first of all, it is necessary to determine which material models will be used, whether there will be a coiled concrete model, whether the moment curvature will be idealized or not, and to create a code accordingly. Apart from these, a fiber model-like model can be used when finding the force balance. It may be difficult to make an ideal assumption such as a rectangular section, as there will be different shapes for each angle value. Ready-made matlab codes etc. related to these topics can be found very easily. The vast majority will be two-dimensional, but at least it can give an idea. Best regards...