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O modeliranju i projektovanju betonskih konstrukcija prema trajnosti
aUniverzitet u Novom Sadu, Građevinski fakultet, Subotica
bUniverzitet u Novom Sadu, Fakultet tehničkih nauka, Institut/odsek Građevinarstvo

e-adresamost@gf.uns.ac.rs, folic@uns.ac.rs
Projekat:
Istraživanje mogućnosti primene otpadnih i recikliranih materijala u betonskim kompozitima, sa ocenom uticaja na životnu sredinu, u cilju promocije održivog građevinarstva u srbiji (MPNTR - 36017)

Ključne reči: Betonske konstrukcije; Trajnost; Eksploatacioni vek; Modeli; Pouzdanost; Projektovanje; Deterioracioni procesi; Performanse; Indikatori trajnosti betona
Sažetak
U tehničkim propisima (kodovi) za projektovanje betonskih kosntrukcija (BK) koji su primenjivani skoro do kraja XX veka, trajnost je tretirana implicitno i nije bio definisan njihov eksploatacioni vek (EV). Ovaj pristup se tokom vremena pokazao nedovoljnim, naročito u uslovima intenzivnog rasta zagađenosti okruženja. U aktuelnim kodovima za projektovanje BK (npr.EN, tj. Evrokod-EC), trajnost se tretira implicitno i većina ne sadrže kvantificirane smernice za projektovanje BK sa EV dužim od 50-tak godina. Pri tome je i EV implicitno definisan, bez jasnog značenja, šta je kraj EV? Smatralo se de će primena odredbi ovih kodova rezultirati trajnom BK u eksploataciji, i da će one dostići zahtevani EV, što često nije slučaj. Iskustva ukazuju da ovaj pristup ne zadovoljava uslove trajnosti, naročito kad je zahtevani EV značajno duži od 50-tak godina (100 ili više). Savremeni pristup projektovanju pouzdanih BK zasniva se na performansama i ponašanju, tokom EV. Probabilistički pristup (zasnovan na verovatnoći i pouzdanosti) projektovanju omogućuje tačniju prognozu ponašanja BK tokom EV, ali je složen i mogućnost njegove šire praktične primene je u fazi razvoja. U ovom radu su, na osnovu pregleda literature i savremenih kodova, analizirani neki modeli i pristupi projektovanju BK, prema trajnosti. Naglasak je na projektovanju prema performansama, zasnovano na indikatorima trajnosti betona, uz aktuelne predloge za reviziju EN 1992 i EN 206, zasnovanu na stečenim iskustvima i novijim istraživanjima, u ovoj oblasti.
Reference
*** (2006) Model code for service life design of concrete structures. FIB Bulletin, 34, p. 116
*** (2009) Structural concrete-textbook on behaviour, design and performance. FIB Bulletin, 53, Vol. 3, p.373, Lausanne, Switzerland
*** (2013) Model code 2010. FIB Bulletin, 65, Vol. 1, Final draft, p. 310
*** (2013) GDOT research project No. RP 12-08: Final report viability of concrete performance-based specification for Georgia DOT projects. Georgia: Institute of Technology, Cw Georgia DOT, p. 94
*** (1998) ISO 2394:1998: General principles on reliability for structures
*** (2008) ISO 13823:2008: General principles on the design of structures for durability
*** (2012) ISO 16204:2012: Durability-service life design of concrete structures
*** (2014) JWG (JWG 250/104-N25) durability report 2014: Durability exposure resistance classes, a new system to specify durability in EN 206 and EN 1992. Leivestad: Steinar, p.27
*** (2014) Durability rules for the waves. Concrete, december, pp. 17-19, www.concrete.org.uk, 6-7 May, www.evolving-concrete.org
*** (2000) EN 206-1:2000: Concrete-specification, performance, production and conform. Brussels: CEN
*** (2002) EN 1990-Eurocode: Basis of structural design. Brussels: CEN
*** (2004) EN 1992-Eurocode 2: Design of concrete structures. Brussels: CEN
Baroghel-Bouny, V., i dr. (2007) Concrete design for a given structure service life. u: Scientific and technical document: Guide for the implementation of a predictive performance approach based upon durability indicators, AFGC
Beushausen, H. (2014) Principles of the performance-based approach for concrete durability. u: RILEM International workshop on Performance-based specification and control of concrete durability, Zagreb, pp. 341-350
Bjegović, D., Stipanović, O.I., Serdar, M. (2011) From prescriptive towards performance-based durability design of concrete: Workshop-cement and concrete for Africa. Berlin: BAM Federal Institute for Materials Research and Testing, pp. 50-58, V
Folic, R., Zenunovic, D. (2010) Durability problem of RC structures in Tuzla industrial zone - Two case studies. Engineering structures, vol. 32, br. 7, str. 1846-1860
Folić, R., Zenunović, D. (2009) Projektovanje betonskih konstrukcija sa aspekta trajnosti i produženja eksploatacionog veka. u: Marinković S., Radonjanin V. [ur.] Konferencija - Graditeljstvo i održivi razvoj, 4-5 jun, Beograd: DIMK-GF, str. 183-216
Folić, R. (2009) Projektovanje betonskih konstrukcija sa aspekta trajnosti, deo 1 - osnovne analize. Facta universitatis - series: Architecture and Civil Engineering, vol. 7, br. 1, str. 1-18
Folić, R., Zenunović, D. (2010) Durability design of concrete structures, Part 2: Modelling and structural assessment. Facta universitatis - series: Architecture and Civil Engineering, vol. 8, br. 1, str. 45-66
Grković, S., Folić, R. (2015) Some aspects of designing concrete structures based on durability. u: First Scientific - Appliedd Confernece with International participation reinforced concrete and mansory structures-Theory and practice, 22-23 october, Sofia, p.10, Abstarct No. 40, p.53
Gulikers, J. (2014) The Netherlands an owner's perspective on probabilistic approaches for durability design. u: Seminar fib Commission 5, Durability of Concrete Structures, School of engineering, University of Minho Guimarães, pp. 43-65
Heland, S. (2012) ISO 16204: Durability - service life design of concrete structures, durability aspects of flay ash and slag in concrete. u: Workshop Proceeding from a Nordic Mini-seminar, Oslo, pp. 15-21
Helland, S. (2013) Design for service life: implementation of fib Model Code 2010 rules in the operational code ISO 16204. Structural Concrete, 14(1): 10-18
Kessy, J.G., Alexander, M.G., Beushausen, H. (2015) Concrete durability standards: International trends and the South African context. Journal of the South African Institution of Civil Engineering, 57(1): 47-58
Mayer, T.F., Schiessl, P. (2008) Life cycle management of concrete structures, part I: Birth certificate. u: Alexander M.G., Beushausen H.D., Dehn F., Moyo P. [ur.] Concrete Repair, Rehabilitation and Retrofitting II, London, UK: Taylor & Francis Group
Muigai, R., Moyo, P., Alexander, M. (2012) Durability design of reinforced concrete structures: a comparison of the use of durability indexes in the deemed-to-satisfy approach and the full-probabilistic approach. Materials and Structures, 45(8): 1233-1244
Rostman, S. (2000) Service life design of concrete structures-an experience-based discipline becoming scientific. u: Papers in structural engineering and materials-A Centenary Celebration, Department of Structural Engineering and Materials, TU of Denmark, pp. 131-150
Sarja, A., Vesikari, E., ur. (1996) Durability design of concrete structures: RILEM TC 130-CSL. London: E&FN Spon, pp. 165
Telford, T. (1993) CEB-FIP model code 1990
van der Wegen, G., Polder, R., van Breugel, K. (2012) Guideline for service life design of structural concrete: A performance based approach with regard to chloride induced corrosion. HERON, Vol. 57, No. 3, pp. 153-167
 

O članku

jezik rada: srpski
vrsta rada: neklasifikovan
DOI: 10.14415/zbornikGFS28.06
objavljen u SCIndeksu: 03.02.2016.