Using different concrete classes in the same reinforced concrete structure

aksmuhendislik

New Member
Hello my dear teachers, Can we use a different concrete class in the same reinforced concrete structure? For example; We poured the ground floor C30, the last floor C25, or we poured the columns C30, the floors C25 ... etc. I would appreciate it if you, our esteemed professors, would talk about the advantages or disadvantages of this example situation.
 
Re: Using a different concrete class in the same reinforced concrete structure... Hello
"aksmuhendislik":29gogwmv" said:
Can we use a different concrete class in the same reinforced concrete structure?
Although rare in practice, basic and upper the building can be made of different concrete classes
"aksmuhendislik":29gogwmv" said:
For example; We poured the ground floor C30, the last floor C25, or we poured the columns C30, the floors C25 ...etc
It is not practical to pour different concrete between floors or different columns, beams, floors, and it is not a common practice. I have never seen such a project before. I do not think that this project will pass the Building Control. Unver ÖZCAN
 
Re: Using different concrete classes in the same reinforced concrete building... I think it is not appropriate to use different concrete classes even in different blocks in the same site. As someone who has worked at the construction site for many years, I say that concrete mixes. They can even order by looking at the concrete class in only one of the buildings. Nobody looks at each sheet one by one to see what the concrete class is. If different concrete classes will be used, the project should be descriptive, the issue is to write C25 on the foundation sheets, C30 on the upper floor sheets, instead of writing C30 on the concrete class section on each sheet (Basically C25, C30 on the upper floors).
 
Re: Using a different concrete class in the same reinforced concrete building...
"aksmuhendislik":uke7dtul" said:
My dear teachers, Can we use a different concrete class in the same reinforced concrete building? For example, ground floor C30, top floor We poured C25 or we poured the columns C30, the floors C25 ... etc. I would appreciate if you, our esteemed professors, tell us about the advantages or disadvantages of this example situation.
Although it is problematic in terms of application, for each element (hence for each floor) in ide statics, it is different. material definition is possible.
 
Re: performance analysis report interpretation... Hello dear colleagues, I made a performance analysis in a 3-storey building whose ground floor will be used as a Quran course (I=1.5). static survey and core results. (C10 received)...etc. I entered all the information. Controlled damage emerged as a result of the performance analysis. The percentage of shear force carried by the vertical elements in the Y direction was 28.3 on the ground floor. (There is no other negativity). How can a comment be made based on all these situations? Is reinforcement required? How should performance analysis results reports be evaluated in GENERAL? (2018 TBDY ) I WOULD LIKE TO BENEFIT FROM YOUR VALUABLE COLLEAGUES AND YOUR INFORMATION ON THE SUBJECT. THANKS NOW...
 
Re: performance analysis report interpretation...
"aksmuhendislik":2p0own2d" said:
Hello my dear colleagues, I made a performance analysis in a 3-storey building whose ground floor will be used as a Quran course (I=1.5) . static relief and core results.( C10 was taken)...I entered all the information etc. As a result of the performance analysis, controlled damage was found. The percentage of shear force carried by the vertical elements in the Y direction was 28.3 on the ground floor. How can a comment be made?
 
Re: performance analysis report interpretation...
"aksmuhendislik":5uidz6l0" said:
Hello my dear colleagues, I made a performance analysis in a 3-storey building whose ground floor will be used as a Quran course (I=1.5) . static relief and core results.( C10 was taken)...I entered all the information etc. As a result of the performance analysis, controlled damage was found. The percentage of shear force carried by the vertical elements in the Y direction was 28.3 on the ground floor. How can a comment be made? is reinforcement required? How should the performance analysis result reports be evaluated in GENERAL? (2018 TBDY) I WOULD LIKE TO BENEFIT FROM YOUR VALUABLE COLLEAGUES AND YOUR INFORMATION ON THE SUBJECT THANKS IN NOW...
Hello, Earthquake Design Class of the Existing Structure DTS=1a performance analysis should be performed separately according to DD-1 and DD-3 according to Table 3.4(c). he is drinking. Good work
 
Re: Using different concrete classes in the same reinforced concrete building... Thank you for your interest, Mr. Levent. In our DTS 2a structure, the targeted performance level has been specified as controlled damage. Can we say that there is no need for reinforcement in case of controlled damage as a result of the analysis I want to learn?
 
Re: Using different concrete grades in the same reinforced concrete building...
"aksmuhendislik":3dpppl23" said:
Thank you for your interest, Levent, the targeted performance level in our DTS 2a building is specified as controlled damage. Can we say that there is no need for reinforcement if the result of the analysis I want is controlled damage?
Hello again, we cannot say that there is no need for reinforcement according to your project. You wrote that you are evaluating an existing structure in your message. Table 3.4.a) in the picture you attached gives the desired performance targets for the buildings to be built. The status of an existing building is decided by performing a performance analysis. It is requested to perform a performance analysis (analysis according to SGDT) in an existing structure with DTS=2a and to meet the performance conditions given in Table 3.4.c, which I added in my previous message. If these conditions are met (provided there is no brittle element), we can say that there is no need for reinforcement.
 
Re: Using different concrete classes in the same reinforced concrete structure... HOCAM LEVENT I ANALYZES ACCORDING TO THE PARAMETERS AS STATED IN THE APPENDIX. THE RESULT IS I GET CONTROLLED DAMAGE (ŞGDT) RESULT. CAN WE PROVIDE A REPORT THAT CAN BE USED AS A KU-AN COURSE? ) MY QUESTION HOW CAN WE INTERPRET THE PERFORMANCE ANALYSIS RESULTS ACCORDING TO THE IGDT? THANKS IN NOW
 
Re: Using different concrete grades in the same reinforced concrete building...
"aksmuhendislik":mjblie3x" said:
HOCAME LEVENT I ANALYZES ACCORDING TO THE PARAMETERS AS STATED IN THE ANNEX AND THE RESULT IS CONTROLLED DAMAGE (ŞGDT) COMMENT RESULT WE CAN SAY THE BUILDING CAN BE USED WITHOUT ANY OPERATION. In the /TBDY 2018 wizard; -After selecting earthquake level DD-3 and editing, you will provide "Limited Damage" performance level in Performance analysis ((There will be no Brittle element) -After selecting Earthquake Level DD-1 and editing, "Controlled Damage" performance level in Performance analysis (There will be no brittle elements) We can say that there is no need for reinforcement when the above two conditions are met in your building.
 
Re: Using different concrete classes in the same reinforced concrete building... Hello again, lecturer Levent, Can we solve the slab floors according to the semi-rigid diaphragm? Is there a statement in the regulation that it cannot be done?
 
Re: Using different concrete classes in the same reinforced concrete structure...
"aksmuhendislik":2z5o6q53" said:
hello again, teacher levent, is there a statement in the regulation that it cannot be done?[ /quote] Hello, Any structure can be solved with a semi-rigid diaphragm. If there is no A2-A3 irregularity in the structure and the system is not a beamless slab, a solution can be made by accepting a fully rigid diaphragm.
 
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