Analiza pukotina na betonskim mostovima

master's thesis

• Title (english): Analysis of cracks on concrete bridges
• Author: Franka Roković
• Mentor: Marija Kušter Marić (mentor)
• Committee member: Marija Kušter Marić (predsjednik povjerenstva)
• Committee member: Ana Mandić Ivanković (član povjerenstva)
• Committee member: Marta Šavor Novak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Structures); Zagreb
• Defense date and country: 2019-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract

Beton, kao materijal, ima relativno visoku tlačnu, a malu vlačnu čvrstoću pa su zato betonske konstrukcije sklone nastanku pukotina. Pukotine utječu na trajnost i nosivost konstrukcije, te su stoga potrebni redovni pregledi i analiza pukotina. U okviru ovog rada provedena je evaluacija pukotina na tri betonska mosta preko rijeke Save u Zagrebu u dvije faze: preliminarno, na temelju teoretskog znanja, i koristeći računalni program razvijen od strane Japanskog instituta za beton (JCI). Evaluacija pukotina na svakom mostu uključuje: (i) skupljanje podataka o projektiranju, građenju i održavanju mosta; (ii) vizualni pregled; (iii) mjerenja geometrije pukotina pomoću nerazornih metoda; (iv) određivanje uzroka pukotine; (v) odluka o potrebi za popravkom i/ili ojačanjem i (vi) izbor prikladne metode popravka odnosno ojačanja. Na temelju provedene analize, može se zaključiti da JCI program je koristan alat u evaluaciji pukotina u betonu, ali ključan faktor u toj analizi je inženjer sa svojim znanjem i iskustvom. Katalog pukotina, izrađen na temelju vrsta uzroka predstavlja dodatni doprinos ovom radu.

Abstract (english)

Concrete, as a material, has a relatively high compressive and low tensile strength, so concrete structures are vulnerable to cracking. Cracks have influence on the durability and the load-bearing capacity of the structure and therefore regular visual inspection and crack analysis are required. In the framework of this thesis, evaluation of cracks on three concrete bridges across Sava River in Zagreb is provided in two stages: preliminary, based on the theoretical knowledge and using software developed by Japan Concrete Institute (JCI). Evaluation of cracks on each bridge includes: (i) collecting data on bridge design, construction and maintenance; (ii) visual inspection; (iii) measurements of crack geometry using non-destructive methods; (iv) determination of crack cause; (v) decision on needed repair and/or strengthening and (vi) selection of repair and strengthening methods. Based on the provided analysis of cracks on the selected bridges, it can be concluded that the JCI software is helpful tool for concrete cracks evaluation, but engineer's knowledge and experience are a key factor in the analysis of cracks on concrete structures. The crack catalogue is created based on crack causes represents an additional contribution of this thesis.

• Keywords: uzrok pukotine; betonski most; evaluacija pukotina; popravak; ojačanje
• Keywords (english): crack cause; concrete bridge; crack evaluation; repair; strengthening
• Language: croatian
• URN:NBN: urn:nbn:hr:237:719462
• Study programme: Title: Civil Engineering; specializations in: Construction Management, Transportation Engineering, Geotechnical Engineering, Hydraulic Engineering, Structural Engineering, Construction Materials, Theory and Modeling of Structures; Course: Structural Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka građevinarstva (magistar/magistra inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-11-14 06:55:53