EXAMPLE 2. FORMAL STUDY METAL CONSTRUCTION

EXAMPLE 2: 'DESIGN OF A METAL STRUCTURE' 60 In the automatic procedure, the program finds the 12 worst combinations of all members of the vector (Max N with the corresponding 6 group of , Min N and so on) and performs the check. (see Manual Chapter Sizing). Suppose that member 43 for cod. 9 has the following: N=55.40KN, VY=0KN, VZ=38.96KN, MX=0KNm, MY=123.59KNm and Mz=0KNm. For this particular combination the automatic procedure (auto) calculates a ratio of 0.29 - green color in the corresponding cell). This ratio is the worst ratio obtained by testing in M-V-N (MY,VZ,N). But if you choose to do the check yourself by clicking on the cells in the first row and then on the Layer dimensioning, you will notice that the check in M & M-V fails (red). This is because in this case the program only uses the values of MY,VZ and ignores N (worst case) which however in this example does not exist because the axial exists. In general, in addition to auto you can choose for which individual intensities or combinations of intensities you want the respective checks to be performed. To summarize, when you put your mouse cursor over a cell and it is green, you will see that a value below one unit (sufficiency) is displayed. If instead you point to a red cell then the value displayed will be above unity (miss) . You also have the possibility to do sizing by entering your own intensive sizes through the "user" option. The results of the dimensioning in summary, (either from the automatic process or from the selection of the individual intensities, or by the user) can be viewed by clicking on the command "Issue results" or in detail by clicking on the command "Layer investigation". The