Short talking for the joint of semi-rigid frame III

　　I work for the same problem recently, and I choose the Chapter 11 of Taiwanese LSD Code to solve the yield problem. I can calculate the limitation of the flange or web for the H beam, and the formulas are just to control its allowable reaction force. Of course, the reaction force may be too large for the H beam, but I can choose the larger H beam for the engineering construction design. The ASTM A572 Gr.50 H beam, RH900x300x16x28, is selected, and the formulas 11.2-1 & 11.2-2 are also selected for the present situations. If you wanna know how to define N, you can see the Figure C11.2-1 where is located on the Taiwanese LSD Code. Besides, the parameter k is NOT tf, but you have to include the circular region which is k = tf + R. In my engineering case, I don't have to add the stiffening plates, so that I just provide the fundamental formulas. The steel material is not JIS or CNS standard, so that I don't have to reduce the yield stress Fyf for the flange whose thickness is less than 1.5in. Hence, I can check whether the size of H beam is enough or not, so that the yield problem has been solved.


　　

　　

　　
　　

Reference

1. 內政部營建署（2010）鋼結構極限設計法規範及解說，內政部營建署。

A Simple Case Study of Steel Structure

　　My company assigned me a frame case to set up a solar system on the roof of a factory, and I found a L.T.B problem of the steel structure which I wanna let you know the calculation details. The computer program STAAD.Pro 2007 is adopted, and I check the results by the hand calculation. When you use the computer program, you cannot discover what the problem is. This member is a simple beam with the Dead Load 24.75kgf/m and Wind Load 272.25kgf/m, and the section RH150x75x5x7 is selected. The steel material is CNS SM400, and its self-weight is 14.0kgf/m. In the general design methodology, the engineers always take Lp to control the member length, but sometimes they may not be able to use the same approach for every case. I show you a real case, and it shall be a good example for reference.


　　


　　

　　
　　








References

1. 內政部營建署（2010）鋼結構極限設計法規範及解說，內政部營建署。
2. 中華民國結構工程學會（2003）鋼結構設計手冊：極限設計法，科技圖書。

Spell my name correctly

　　In 2002, I had ever used the Cornell's software, FRANC2D, and I also changed its C source code. I know I used the wrong name, FLAC2D, to spell it before, and I have corrected all of the relative articles. My name is Ching-Min Huang, not Ching-Ming Huang (95%) or Chin-Min Huang (5%). In case you are my constant readers, please remember my name and spell my name correctly. In my first name, the word "Ching" stands for congratulation, and the word "Min" stands for people. Please don't add the English character "g" at the tail of the word "Min". Besides, my first name has a hyphen "-" to connect both of Ching and Min, but I don't use a hyphen to connect the initials for C. and M. I recognize three different kinds of name formats which are Ching-Min Huang, C. M. Huang, and cmhuang. Besides, I recognize the traditional and simplified versions of my Chinese name at the same time. What's the different between the two versions? Of course, the word "Ching" is the main different word, and the both versions are the standard formats for the traditional and simplified Chinese. However, my surname "Huang" has two versions, and I choose my Taiwanese ID Card format. In fact, since I was a child, I have started to use this format as my signature. As everyone knows, I bought much font software, and I just choose my favorite fonts for the both versions which are as follows.


Reference

1. Cornell Fracture Group, FRANC2D, http://www.cfg.cornell.edu/software/franc2d_casca.htm