Column Beam Junction Zone error

[ahmet33]

Friends, what are your solutions for the column beam junction area error? I have no chance to play with the column dimensions in my project, no matter how much I play with the beam dimensions and the concrete class, I only get the column beam junction area error. What are your solution suggestions?

 

[actombo]

Beams take in 5-10 cm. Stub the column from scratch. It's difficult to implement, but I couldn't find any other solution.

 

[Levent Özpak]

Friends, what are your solutions for column beam junction area error? quote] In order to determine which elements cause the problem in the column-beam junction, first of all, click on the Column line from the Reinforced Concrete menu to enter the column reinforced concrete dialog.Here, click on the problem element with the left mouse button once.Click the Joint Area Security line and select the elements in the direction of the problem from the window that opens After determining, you can apply the following suggestions in the relevant direction: Formulas: Vmax= x . 2bj . h . fcd x=0.60 for confined joints, x=0.45 for unconfined joints Vmax = Maximum limit value fcd = concrete compressive design strength Bj = In the direction of the considered earthquake, the combination Double the distance from the vertical middle axis of the beam stuck in the area to the column edge, the dimension of the vertical edge of the column belonging to the beam that says h = UNSAFE. Beam shear force: Ve= 1.25 . fyk . (As1+As2) - Vkol fyk = reinforcement characteristic yield strength As1 = Total area of tensile reinforcement placed on one side of the column-beam joint to meet the negative moment of the beam As2= Total area of the tensile reinforcement placed at the bottom to meet the positive moment on the other side of the beam with respect to As1 Tensile reinforcement area Vkol= Smaller of column shear forces. If Ve > Vmax in any earthquake direction, there is B in the columns. a. The easiest way is to enlarge the bj or h value. 9_1.PNG 9_1.PNG (7.6 KiB) Viewed 82605 times As you can see, the bj value increases as the beam slides into the middle of the column or the width of the beam increases. If the bj value cannot be increased, the h value must be increased. You can make 50/30 instead of 50/25 or reverse the column sizes. b. Making the column a curtain: Curtains do not enter the column-beam cutting safety control. c. Measures should be taken to reduce As1 and As2. More rigid system design, such as ensuring the continuity of the frames. In general, frames in the form of columns-beams-columns, stud beams and columns-beams-columns in overhangs create negativity. D. Enlarge the fcd by using higher strength concrete. Some Suggestions: 9_2.PNG 9_2.PNG (18.48 KiB) viewed 82605 times 9_3.PNG 9_3.PNG (19.03 KiB) viewed 82605 times It is difficult to mold, but maybe L, T or cross shaped columns can be made. You can review the 9th item in the frequently asked questions document for the solution of column beam joint shear safety errors.

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[adarclk]

Hello, I am getting column beam zone shear insecurity error in my project. I enlarged the bj and h values to meet the vmax value. I enlarged both the column dimensions and the beam dimensions. In the reports section, I fixed these errors one by one in the column beam area reports. However, the last time I analyzed, I got the same errors again. Vr and Vmax values are changing. At high ductility level, my project only has column beam shear insecurity error. When I change the ductility level and make it limited, the errors disappear. Is there a clause about this in the earthquake code? Can I do the project that way? Do you have any other solutions for the errors?