Cylindrical section roof

[ottomancagatay]

In the project, a roof is requested based on the section formed by cutting the cylinder at an angle. I request you to have a few questions and suggestions urgently. 1-) I was able to create the shape I wanted, but I placed the trusses directly on the reinforced concrete column. When I use the apply support area joint detail command as a connection detail, what is your suggestion for another connection detail to create some meaningless joint details? Would it be more correct to sit on a steel column with a truss? In the projects I always examine, a steel column was created and a connection was made to it. 2-) I had to combine the trusses to trusses due to the roof form, but I could not create a joint detail. Is there any problem in keeping it that way? As far as I examined from the analysis model section, I could not observe a problem. 3-) I tried to collect the ends of the scissors at one point, I wanted to combine the scissors by making a half ring for the column in the center to be easy to manufacture, but I could not do it, as I modeled, it can stay if there is no problem. 4-) I couldn't pass the strength and slenderness checks, it doesn't cross, I combined the lower and upper headings from 3 separate points and it still didn't work. 5-) the purlins are a little out of shape due to the roof format, I tried to throw the purlins one by one, because they were gradual, there were no scissors and the program was closed. 6-) Since the reinforced concrete will be made by another colleague in another program, I could not find where to look at the axial loads coming to the columns, more precisely, when I select the axial loads from the 3D section effects and look through the steel envelope, the values are not readable, the analysis file link

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[nurgulkaya]

Re: CYLINDRICAL section roof Hello; Since there is a slight slope where your trusses are connected to the reinforced concrete elements, the support joint is not fully connected. To solve this, you can edit 1 pane from the changes tab in the scissors properties. Available in the attached image. Then you can easily use the support joint. However, many trusses are connected to the middle column. In the program, you cannot select a large number of trusses and define a support combination. You must make this arrangement in the drawings. Instead of the above option, if you reduce the truss elevations so that both the lower and upper heads of the trusses overlap with the reinforced concrete column, or if you increase the reinforced concrete columns, you can connect both the upper and lower head to the reinforced concrete column with a butt plate truss combination. In this way, the case of many scissors in the middle column is solved, and the scissors behave more appropriately in terms of stability. Lift the left and right flaps from the scissor properties section of the short-span scissors as you can see in the image. You can connect it to other scissors more easily this way. However, a geometric error occurs when you use the cross join in this state. For this reason, if you wish, you can analyze only these elements without defining a union and edit those regions at the drawing stage. Or you can connect the auxiliary truss lower and upper heads to the main truss with a welded joint. You can define cross for stability on the roof with single crosses instead of multiple cross command. If you hold down ctrl during this process, the program allows you to capture the scissor node points with the program. You can see the internal forces of reinforced concrete columns from the perspective screen right analysis view - section effects - axial force tab. If you select the column you want to look at while this screen is active, a tab will open where you can see all its internal forces. Good work.