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Title:Omejitev širine razpok v mladem betonu zaradi vsiljenih vplivov
Authors:Avguštin, Aleš (Author)
Kuhta, Milan (Mentor) More about this mentor... New window
Klobučar, Aljoša (Co-mentor)
Files:.pdf MAG_Avgustin_Ales_2017.pdf (4,20 MB)
MD5: AD70FE9341296CE1DE406A39E523711F
Work type:Master's thesis/paper (mb22)
Typology:2.09 - Master's Thesis
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:Magistrsko delo obravnava problematiko omejitve širine razpok v mladem betonu, ki se pojavijo zaradi učinkov vsiljenih vplivov. Opisane so vrste razpok in vzroki za njihov pojav, razložena sta proces pojava razpok v armiranobetonskih elementih in izpeljava enačb potrebnih za določitev računske širine razpok ter potrebne površine prereza armature za omejitev njihove širine na predpisane vrednosti. Prikazano je mejno stanje razpok po Evrokodu 2 in FIB Model Code-u 2010. Izvedena je analiza vsiljenih vplivov in njihovih učinkov na mladi beton. Na podlagi reprezentativnih primerov konstrukcij, ki pokrivajo večino v praksi nastalih problemov, je prikazan postopek določitve vsiljenih vplivov. Poznavanje vsiljenih napetosti nam omogoča, da ustrezno izvedemo dimenzioniranje armature za omejitev širine razpok v mladem betonu.
Keywords:razpoke, omejitev širine razpok, faza tvorjenja razpok, faza stabilizacije razpok, vsiljeni vplivi, vsiljene napetosti, hidratacijska toplota, odvajanje hidratacijske toplote, masivni beton, armirani beton
Year of publishing:2017
Publisher:[A. Avguštin]
COBISS_ID:20765718 New window
Categories:KTFMB - FG
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Secondary language

Title:Control of cracking in an early age concrete due to the inner restraint
Abstract:Master’s thesis deals with the issue of limiting the crack width in an early age concrete due to the inner restraint. At first, crack types and causes for their occur are described, followed by an explanation of the crack appearing process in the reinforced concrete elements. Next, the derivation of equations needed to determine the calculation of crack width is presented and cross-sectional area of the reinforcement steel required to limit the crack width based on prescribed values is calculated. Further, the principles of the cracking limit state according to Eurocode 2 and Model Code 2010 are displayed. Finally, an analysis of indirect actions and their effect on the young concrete is given. Based on representative examples, which cover most of the practical issues, it is shown how to determine the impact of restraints. By knowing restraint stresses, we can properly design the reinforcement needed to limit the crack width in the young concrete.
Keywords:cracks, limitation of crack width, crack formation stage, stabilized cracking stage, indirect actions, restraint stress, hydration heat, drain of hydration heat, mass concrete, reinforced concrete


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