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Turkish Mrb friends. First of all, I would like to thank you, dear colleagues, for sharing your useful comments, information and experiences with us for enlightening us. I can strengthen the reinforcement curtains or columns where necessary, but how can I strengthen the deflection and small-sized beams? I did not see such a situation in IDECAD. If there is a point I missed, I am looking forward to your solutions and comments on this issue. Thank you very much in advance for your interest. Take it easy, good work..
Beam Reinforcement
- Thread starter M.atalay
- Start date
As a result of the Performance Analysis, unlock the beams with shear damage from the existing beam information in the building where you entered the first information, change the size-stirrup diameters and spacings of these beams, perform a performance analysis after analyzing them according to the 2007 earthquake regulation, No beams with shear damage are seen in the performance analysis results, life safety Provide details of reinforcement in these beams mentioned. In such on-site applications, the spacers of the beams to be strengthened are stripped, the beam stirrups are opened, and the stirrups found as a result of the calculations are applied in such a way that they completely cover the beam.
I understand, thank you for your information. As you mentioned, we can ensure the shear safety of the beams by increasing the reinforcements and tightening the stirrups. Of course, there is no problem since that. What I really want to say is; When we analyze these creases designed as 25/30, 25/40 in the size of the creases in the buildings designed in previous structures, according to the 2007 earthquake regulations, there are deflections in the creases. In order to prevent this deflection, it is necessary to increase the size of the creases rather than the reinforcement. In other words, a certain amount of sheathing should be done on the creases, just as we do sheathing on the columns in IDECAD, and we need to prevent deflection. However, I couldn't see a case of sheathing for the wrinkles on IDECAD, how should we solve it, this is the main situation 
My friend, 7 chapters in TDY regulation for performance analysis in undamaged Structures available here were published in 2007. It is not correct to use the analysis section of the 2007 regulation for structural reinforcement. Model this structure in version 6.51 and enter the reinforcement and material properties of the existing structure. Perform performance analysis. In the regulation, 30% of the beams are allowed for further damage. In columns, this rate is 20% (according to shear capacity). Here, instead of improving on an element basis, the method of reducing the lateral loads on the elements with additional wall elements that will take the lateral loads should be used. In other words, it is not correct to make a normal analysis and say that these elements have deflection and strengthen on the basis of elements. Particular attention should be paid to beam sheathing. It should not break the strong column rule. Performance analysis and retrofit logic is very different from normal building analysis logic. The ide 6.51 version is currently the best program on the market that does this analysis. (This result was revealed in my METU master's thesis.) As a result, first make a linear performance analysis of the building. If the performance is insufficient, general structural improvement should be made in the brittle elements and additional shears throughout the building after they are strengthened. But all the analysis we do should be structural performance analysis, not normal structural analysis. Greetings Suat
mhanifiata
New Member
suat, if you see fit, can you share that thesis here..."suatyy":y2448hd4" said:
Thesis is in English. Sorry, its publication is limited at the moment, except for the METU library. I think the reason for this is understandable. Since it is a sensitive subject, it is to prevent people from using it for their own purposes by copying it in good faith and pulling some parts from it. I am currently preparing to present the subject in various provinces. Performance analysis is a new topic that is not well understood at the moment and requires explanation and study. Presentations will be announced if you are interested. I prefer to offer it myself to prevent malicious use. But I will answer your related questions as best I can. Greetings. Suat
babisko_fet
New Member
Mr. Suat, you stated in your thesis that the most important thing in retrofit projects is not sheathing curtains or columns. Among the must-haves, beam reinforcement maintains its main place. If you have a sample project with an ideal solution and detail including beam reinforcement, may I ask you to send it with its details? Semih ELDEK Civil Eng.
zekaiturkoglu
New Member
In classical reinforcement for beam reinforcement, the problem can be solved with curtain reinforcement. A second solution is if the building is in use and curtain reinforcement is a laborious application; It may be possible by wrapping with carbon and glass composites to prevent deflection in the beam.