What are your economic suggestions for 20 meter truss sections in the attached project. (we decided to make a double L section) and I added a floor as an attic and drew the trusses on that floor. Thanks
Now I have finished the analysis, but even though the number of mods is insufficient, there are 300 mods and the sections are too many for me, what do you recommend to be more economical
Hello there; There are a few things to consider in your project. 1) The snow load on your coatings is quite high, check that it is the correct value. You have obtained the highest load value according to TS 498. 2) Your roof slope is quite high. If you have to model your scissors with this slope, it would be more appropriate not to include your purlins in the analysis model. If the purlins are included in the analysis model, they will carry loads from the system in proportion to their stiffness, and under this slope, the axial load makes the purlins quite difficult. I removed your lovers from the analysis with the "Selects the analysis pieces" command in the Asik menu. Use in similar situations. 3) To ensure the stability of the trusses, you can use vertical stability braces at the beginning, ridge area and ends of the trusses. In the video in the link, this subject and the benefits of stability beams for trusses and beams are mentioned. I recommend you to watch.
4) You have modeled the roof braces as discontinuous. The braces must be regular across an opening for the stability of the structure. 5) I have defined tension rod for your lovers in all openings. Having the tension rods only in some openings does not provide any serious benefit. Which is still insufficient cross-sections of your lovers. This is quite normal considering your snow load and pavement fixed load. As a solution, you should enlarge the section or change the material. 6) For the number of modes, enter the structure tree analysis-modal analysis-modal and change the method to ritz and set the mode number to 250. The reason for the insufficient number of modes is the combination of reinforced concrete and steel elements. Good work.
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