izpis_h1_title_alt

Nastanek in širjenje razpok pri natezno obremenjenem armiranobetonskem elementu : magistrsko delo
Kralj, Urban (Author), Bratina, Sebastjan (Mentor) More about this mentor... This link opens in a new window, Saje, Drago (Co-mentor)

.pdfPDF - Presentation file, Download (6,76 MB)

Abstract
V magistrski nalogi se ukvarjamo z analizo nastanka in širjenja razpok pri armiranobetonskem elementu, ki je izpostavljen delovanju kratkotrajne natezne obremenitve. V ta namen smo zasnovali in izdelali tri preizkušance pravokotnega prečnega prereza 10,8/7,2 cm in dolžine 80 cm, pri čemer smo pri enem vzdolžno armaturo vodili neprekinjeno, pri drugih dveh pa smo izvedli stikovanje armature s prekrivanjem na različnih dolžinah. V vse preizkušance smo dodatno vgradili tudi stremensko armaturo z namenom preprečitve pojava razcepljanja betonskega ovoja. Po izvedbi nateznih preizkusov smo z numeričnim modelom, ki je bil razvit v okviru raziskovalnega dela na katedrah KMLK in KM, za obravnavane elemente simulirali pojavljanje razpok in rezultate primerjali z eksperimentalnimi opažanji. Ugotovili smo, da lahko z uporabljenim numeričnim modelom dovolj natančno simuliramo nastajanje in širjenje prečnih razpok, ne moremo pa simulirati pojava cepilnih razpok in njihovega vpliva na natezno nosilnost elementa. Lahko jih upoštevamo posredno, in sicer z ustreznim konstitucijskim zakonom stika med armaturo in betonskim ovojem na območju preklopa. Dodatno smo ugotovili, da lahko z vgrajenimi stremeni preprečimo ali vsaj omilimo pojav razcepljanja betonskega ovoja v območju preklopa vzdolžne armature.

Language:Slovenian
Keywords:armiranobetonski element, razpokanost, širjenje razpok, natezno obremenjevanje, stikovajne s prekrivanjem, stremenska armatura, numerični model
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2018
Publisher:[U. Kralj]
UDC:624.012.45(043.3)
COBISS.SI-ID:8593761 Link is opened in a new window
Views:122
Downloads:55
Metadata:XML RDF-CHPDL DC-XML DC-RDF
 
Average score:(0 votes)
Your score:Voting is allowed only to logged in users.
:
Share: Bookmark and Share

Secondary language

Language:English
Title:Crack appearance and propagation along tensile loaded reinforced concrete element : master thesis
Abstract:
In this master's thesis we deal with the analysis of the formation and propagation of cracks in a reinforced concrete element that is exposed to the short-term tensile load. For this purpose, we made and tested three reinforced concrete elements with rectangular cross-section of 10,8/7,2 cm and length of 80 cm. In one element longitudinal reinforcement was continuously guided, while in the other two we carried out the lap splice at different lengths. In all specimens, we also installed stirrups in order to prevent the appearance of splitting of the concrete cover. After tensile tests were carried out, a numerical model, developed in research work at the KMLK and KM, was used for simulating the cracking of the elements and then we compared the results with the experimental observations. We have found that by using the numerical model we can simulate the formation and propagation of transverse cracks sufficiently precisely, but we cannot simulate the appearance of splitting cracks and their effect on the tensile load capacity. They can be taken into account indirectly by appropriate bond stress – slip relationship between the reinforcement and the concrete in the lap splice area. In addition, we have found that with confinement, the splitting of the concrete cover in the lap splice area of the longitudinal reinforcement can be prevented or at least mitigated.

Keywords:reinforced concrete element, cracking, crack propagation, tensile stress, lap splice, stirrups, numerical model

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back