Reverse beam identification

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emrahgokdemir

Member
Hello, While defining reverse beam, I define reverse beam according to the rule written by idecad officials in the forum; ---------------------------------------------------------------- ---------- Posted by HakanŞahin » 03 May 2019, 12:58 Identification depends on the upper elevation and height of the beam. If the height of the beam does not coincide with the bottom of the column, you must also level the columns. In case of unsuitable level, a warning message will be given in the form of incorrect beam level or unsupported beam in the geometry control. User avatar HakanŞahin Site Admin --------------------------------------------- -------------- In the attached project, the beams K27 and K28 are connected to the basement diaphragm. These beams are desired to be made as reverse beams because of the garage entrance. The lower level of the beams in question is modeled to be at the basement floor level. Therefore, since the height of the beam coincides with the lower level of an upper column, I did this process by not giving elevation to the columns, but only to the beams. However, as can be seen from the attached screenshots, when I analyze without applying the reverse beam, no strangeness is observed in the analysis model, while after the analysis with the reverse beam, it is seen that the reverse beams appear in the analysis model in strange ways. I'm waiting for help from idecad authorities on this issue. Good work, Best Regards, Civil Eng. Emrah GOKDEMIR ------------------------------------------------ ------------- ------------------------------------------------ ------------------------ MODEL FILE:
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Re: REVERSE BEAM DEFINITION PROBLEM Increase the upper levels of the walls and columns that appear on the screen by the amount of the upper level of the beam. Shorten the lower ends of the same curtains and columns on the next floor by the same amount.
 
Re: REVERSE BEAM IDENTIFICATION PROBLEM Mr. sahinsukru, I have been practicing by giving elevation to the columns with the method you mentioned for a long time. But if you examine the post in the link below, idecad officials suggest to apply the reverse beam as I have attached the screenshots. ---------------------------------------------------------------- ---------------------------------------------------------------- ---------------------------------------------------------------- ------------------------------------------ [color=#4000BF ]https://www.idecadsupport.com/forum/viewtopic.php?f=5&t=7591&hilit=ters+kiri%C5%9F[/color] ------------ ---------------------------------------------------------------- ---------------------------------------------------------------- ---------------------------------------------------------------- ------------------------------ (If you open the link, find Hakan's comment, download and examine the suggested project he added, you will understand that I am modeling correctly. Comment by Hakan: Hello, you don't need to level the columns S1 and S2, S3 on the ceiling of the 1st basement floor and the ceiling of the 1st floor.The upper and lower levels of these columns should be in line with the floor plane.Because the beam height coincides with the lower end of the column It is appropriate to only level the beam within the definition of reverse beam.With this data entry, the beam is aligned with the 1st basement rigid diaphragm. ni elevation will be present in the model and the beam axial force will decrease. The data entry edited project is attached. Nmax_corrected.cde (4.7 MiB) downloaded 332 times ) --------------------------------------- ---------------------------------------------------------------- ---------------------------------------------------------------- ---------------------------------------------------------------- --- when the old-fashioned application is made as you say, the curtain raised to the upper level of the opposite beam receives an incredible shear force. The value of "And" comes out around 1220. The curtain distribution can only be saved if an intermediate distribution of 20 by 6 cm is made. The bending of such a distribution is a very difficult situation to manufacture. Also, in the old-fashioned application, the problem of axial capacity insufficiency in the reverse beams is often encountered. However, if modeling is done with this method led by ide, the axial capacity errors in the opposite beams are minimized, and the incredible shear force on the curtain falls very low (from around 1220 to around 210), so it can be met with a small amount of distribution. ---------------------------------------------------------------- ---------------------------------------------------------------- ---------------------------------------------------------------- ------------------------------------------ IF IT IS MY PROBLEM: implement as suggested by the ide When I do it, post-analysis, in the analysis model, the inverted beams appear to be supported in strange ways. IS THIS A PROBLEM? OR IS IT NORMAL? I'm waiting for help from idecad authorities on this issue. ---------------------------------------------------------------- ---------------------------------------------------------------- ---------------------------------------------------------------- ------------------------------------------
 
Re: REVERSE BEAM IDENTIFICATION PROBLEM Hello Mr. Emrah, The situation in your project occurs when the reverse beams are spring beams and one end is connected to the curtain. The problem has been noted. Good work
 
Re: REVERSE BEAM IDENTIFICATION PROBLEM Mr. Levent, as far as I understand, this is a problem about the visualization of the results, not a situation that causes an error in the analysis and calculation results, I guess?
 
Re: REVERSE BEAM IDENTIFICATION PROBLEM There may be some variation in the analysis results. At this stage, I can suggest that you define the K27 and K28 beams without raising them, and uncheck the "Continuously accept the beam at the right end" line in the Reinforced Concrete design tab of the properties of the K28 beam. This has been noted. Good work
 
"Levent Özpak":2z8omzdu" said:
There may be some changes in the analysis results. At this stage, define the K27 and K28 beams without leveling, and "Accept beam at the right end as continuous"[/ I can suggest you to do a solution by unchecking the line i] This has been noted. Good work
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As far as I understand, you suggest that I do not make a reverse beam where I need a reverse beam in my project. I would have canceled the reverse beam as soon as I wrote to the forum. until we make a new update on something, we will contact you if you suggest we use reverse beams for bow beams and beams that press one side against the curtain. We expect you to publish an update as soon as possible. I wish you good work. Sent from my SM-G770F using Tapatalk
 
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