prikaz prve stranice dokumenta Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija
Embargo period 2025-02-08
doctoral thesis
Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija
disertacija
Split: University of Split, Faculty of Civil Engineering, Architecture and Geodesy, 2022. urn:nbn:hr:123:696305
Čarija, Jadran
University of Split
Faculty of Civil Engineering, Architecture and Geodesy
Department of Theory of Structures

Institutional repository: FCEAG Repository

Cite this document

Čarija, J. (2022). Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija : disertacija (Doctoral thesis). Split: University of Split, Faculty of Civil Engineering, Architecture and Geodesy. Retrieved from https://urn.nsk.hr/urn:nbn:hr:123:696305

Čarija, Jadran. "Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija : disertacija." Doctoral thesis, University of Split, Faculty of Civil Engineering, Architecture and Geodesy, 2022. https://urn.nsk.hr/urn:nbn:hr:123:696305

Čarija, Jadran. "Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija : disertacija." Doctoral thesis, University of Split, Faculty of Civil Engineering, Architecture and Geodesy, 2022. https://urn.nsk.hr/urn:nbn:hr:123:696305

Čarija, J. (2022). 'Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija : disertacija', Doctoral thesis, University of Split, Faculty of Civil Engineering, Architecture and Geodesy, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:123:696305

Čarija J. Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija : disertacija [Doctoral thesis]. Split: University of Split, Faculty of Civil Engineering, Architecture and Geodesy; 2022 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:123:696305

J. Čarija, "Diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija : disertacija", Doctoral thesis, University of Split, Faculty of Civil Engineering, Architecture and Geodesy, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:123:696305

Metadata
TitleDiskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija : disertacija
Title (english)Discrete numerical modelling of reinforced concrete structures by embedded discontinuity approach : doctoral thessis
AuthorJadran Čarija
MentorŽeljana Nikolić (mentor)
MentorMijo Nikolić (komentor)
Committee memberPavao Marović (predsjednik povjerenstva)
Committee memberVedrana Cvitanić (član povjerenstva)
Committee memberIvica Kožar (član povjerenstva)
GranterUniversity of Split
Faculty of Civil Engineering, Architecture and Geodesy
(Department of Theory of Structures)
Split
Defense date and country2022-02-08, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Civil Engineering
Supporting Structures
Universal decimal classification
(UDC)		624/625 - Civil and structural engineering. Civil engineering of land transport. Railway engineering. Highway engineering
Abstract
U ovom radu predstavljen je novi diskretni numerički model s ugrađenim diskontinuitetom za analizu armirano betonskih konstrukcija izloženih statičkom i dinamičkom opterećenju. Unutar diskretnog modela koji se koristi za simulaciju ponašanja betonske konstrukcije zasnovanog na Voronoi poligonima, koji su povezani kohezivnim vezama modeliranima pomoću Timoshenkovih greda, implementirana je armatura koja se postavlja neovisno o postojećoj mreži diskretnih elemenata betona. Modeliranjem međudjelovanja između armature i betona omogućen je prijenos sila između betonskih i armaturnih elementa te simuliranje klizanja armature. Sve materijalne komponente armiranog betona (beton, armaturne šipke i međudjelovanje betona i armature) modelirane su s istim elementima, Timoshenkovim gredama s ugrađenim diskontinuitetom, koje omogućuju opis heterogenosti u materijalu, nelinearno deformiranje i pucanje betona i armature, kao i klizanje i izvlačenje armaturnih šipki. Kako bi se opisalo ponašanje pojedinih komponenti materijala implementirani su modeli ponašanja materijala i to model oštećenja za opisivanje ponašanja krtih i kvazi-krtih materijala poput betona, te model plastičnosti za opisivanje ponašanja čelika i međudjelovanja između armature i betona. Za modele oštećenja i plastičnosti detaljno je prikazan postupak dobivanja lokalnih/unutarnjih varijabli. Za analizu dinamičkog opterećenja razvijen je dinamički model dodavanjem utjecaja inercijalnih sila. Integracija u vremenu se provodi primjenom Newmarkove metode, koristeći sve prethodno razvijene formulacije za statički model. U sklopu dinamičkog modela prikazana je analiza energija u diskontinuitetu za model oštećenja te za model plastičnosti. Validacija novog modela oštećenja-omekšavanja izvršena je na testovima sa statičkim i dinamičkim opterećenjem. Verifikacija i validacija modela za analizu amirano betonske konstrukcije napravljena je za nekoliko statičkih i dinamičkih testova te su dobiveni rezultati uspoređeni s rezultatima dobivenim poznatim analitičkim i numeričkim metodama te dostupnim eksperimentalnim ispitivanjima.
Abstract (english)
In this paper a novel discrete lattice numerical model with embedded discontinuity was presented for modelling of reinforced concrete structures exposed to static and dynamic load. Into discrete lattice model which is used for concrete behaviour and was represented here by Voronoi cells and Timoshenko beams as cohesive links between them, reinforcement bars were implemented and positioned in the concrete domain irrespective of the Voronoi cells. In order to provide force transfer between concrete and reinforcement and to represent bond-slip, the bond between concrete and reinforcement was modelled. All material components of reinforced concrete (concrete, steel bars and bond between concrete and reinforcement) were modelled with the same elements, Timoshenko's beams with embedded discontinuities which enable the representation of heterogeneity of material, nonlinear deformation, cracking of concrete, rupture of reinforcement, bond-slip and pulling out of the reinforcement. In order to describe each material component behaviour, a damage constitutive model was implemented for brittle and quasi-brittle materials like concrete, and a plasticity constitutive model was implemented for steel and bond between concrete and reinforcement. For the damage model and the plasticity model computation of internal variables was presented in detail. For dynamic analysis, dynamic model was developed by adding inertial contributions. Newmark algorithm is used for time integration, with existing formulation for static model. Also, energy analysis for discontinuity for the damage and the plasticity model was presented. Validation of novel softening-damage model was performed for static and dynamic tests. Verification and validation of model for the analysis of reinforced concrete structure was performed for several of static and dynamic tests and results of numerical simulations of this model were compared with results obtained by analytical and numerical methods and results obtained by experiments.
Keywords
Keywords (english)
Languagecroatian
DOIhttps://doi.org/10.31534/DocT.054.CarJ
URN:NBNurn:nbn:hr:123:696305
Promotion2022
ProjectNumber: IP-2014-09-2319
Title: Razvoj numeričkih modela armirano-betonskih i kamenih zidanih konstrukcija izloženih potresnom opterećenju zasnovanih na diskretnim pukotinama
Title: Development of numerical models for reinforced-concrete and stone masonry structures under seismic loading based on discrete cracks
Acronym: SeismoNuMod
Leader: Željana Nikolić
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Civil Engineering
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje tehničkih znanosti, polje građevinarstvo (doktor/doktorica znanosti, područje tehničkih znanosti, polje građevinarstvo)
Catalog URLhttps://library.foi.hr/lib/knjiga.php?B=422&H=&E=&V=&lok=&zbi=&item=15211
Type of resourceText
ExtentXVI, 95 str. : graf. prikazi, ilustr. u bojama ; 30 cm
File originBorn digital
Access conditionsEmbargoed access
Embargo expiration date: 2025-02-08
Terms of useLicence In copyright icon
Created on2022-04-11 10:43:06