| Title | NELINEARNI PRORAČUN KONSTRUKCIJSKOG SUSTAVA OKVIR-ZIĐE: ISPUNSKO ZIĐE S OTVOROM ZA PROZOR POSTAVLJENIM CENTRIČNO |
| Author | Davor Pejakušić |
| Mentor(s) | Davorin Penava (thesis advisor)
|
| Abstract | Okviri sa ispunom kompozitne su konstrukcije koje se sastoje od okvira, koji je najčešće izveden od armiranog betona ili čelika, te ispune za koju se u Hrvatskoj koriste blok opeke ili betonski blokovi. Ispuna bitno mijenja odziv konstrukcije na potres i njen se utjecaj mora na odgovarajući način uzeti u obzir. Dosadašnji propisi ne sadrže pojašnjenje o tome na koji način obuhvatiti utjecaj ispune u proračun. Najveći razlog leži u nedovoljnom razumijevanju o tome kako ispuna utječe na okvir.
Prijašnji potresi su pokazali kako ispuna može imati i pozitivna i negativna svojstva koja na kraju utječu na ponašanje konstrukcije. Suvremeni propisi koji nastoje ''zaštititi'' okvir uglavnom su orijentirani na negativna svojstva ispune, zbog toga treba poraditi na toj kontroverznoj temi, a poseban problem su okviri s ispunom s otvorima.
U okviru rada istraženo je ponašanje građevne konstrukcije pri simulaciji potresa u i izvan vlastite ravnine. U tu svrhu izrađen je nelinearni mikromodel armiranobetonskog okvira s ispunskim ziđem i otvorom u sredini, u mjerilu 1:2,5 primjenom računalnog programa Atena 3D Eng. Za izvedbu modela u računalnom programu, bila je potrebna kalibracija osnovnih svojstava ziđa koja su se usvojila iz doktorske disertacije (Penava et al. 2012.). Na taj način utvrđeni su parametri koji utječu na modeliranje uokvirenog ziđa kao i dimenzije ziđa te pripadna opterećenja.
U ovom diplomskom radu usporedit će se izvedeno eksperimentalno ispitivanje iz doktorske disertacije s rezultatima dobivenim u računalnom programu. Za još bolju usporedbu, izrađeni su i matematički (pojednostavljeni) modeli raznih autora koji daju smjernice za proračun konstrukcije izložene potresnom djelovanju.
Diplomski rad izrađen je u okviru istraživačkog projekta "FRAme-MAsonry Composites for Modelling and Standardization (HRZZ-IP-2013-11-3013)“ Hrvatske zaklade za znanost.
Rezultati ovog rada su za uvid u utjecaj ispunskog ziđa na odziv armiranobetonskog okvira. Uzimanje utjecaja ispunskog ziđa dovodi do pouzdanije procjene sigurnosti postojećih i novih građevina. |
| Keywords | construction system frame-masonry nonlinear analysis seismic response of frame-masonry construction system |
| Parallel title (English) | NONLINEAR ANALYSIS OF THE FRAME-MASONRY STRUCTURAL SYSTEM: MASONRY INFILL WALL WITH THE WINDOW OPENING POSITIONED CENTRICALLY |
| Committee Members | Krunoslav Minažek (committee chairperson)
Davorin Penava (committee member)
Ivan Kraus (committee member)
|
| Granter | Josip Juraj Strossmayer University of Osijek
Faculty of Civil Engineering and Architecture Osijek |
| Lower level organizational units | Department for Technical Mechanics
Chair of Technical Mechanics |
| Place | Osijek |
| State | Croatia |
| Scientific field, discipline, subdiscipline | TECHNICAL SCIENCES
Basic Technical Sciences
Technical Mechanics (Mechanics of Rigid and Deformable Bodies)
|
| Study programme type | university |
| Study level | graduate |
| Study programme | University graduate study in civil engineering; specializations in: Hydraulic engineering, Supporting structures, Construction management and technology, Transportation engineering |
| Study specialization | Supporting structures |
| Academic title abbreviation | mag.ing.aedif. |
| Genre | master's thesis |
| Language | Croatian |
| Defense date | 2017-11-23 |
| Parallel abstract (English) | Frames with masonry infill walls are composite structures which consist of frame, who can be from reinforced concrete or steel, and masonry infill which is in Croatia blocks of bricks or concrete blocks. Masonry infill significant changes the construction response to the earthquake so there is need to put it under attention. The former regulation doesn't consist explanations of how to include infill in calculations. The biggest reason is that engineers still don't understand the way that infill effects the frame.
Earthquakes in the past showed that infill can have both positive and negative effects on the construction behaviour. Contemporary regulations which strive to protect the frame are usually oriented to the negative sides of the infill, that's why engineers needs to work on that topic. And the special kind of problems is masonry infill walls with the opening.
Within the scope of work, it was investigated the behaviour of structure under earthquake simulation, in plane and out of plane. In that case, the nonlinear micromodel of reinforced concrete frame and masonry infill wall with the opening in the middle was modeled. The measure was 1:2,5 according to the real dimensions and for modelling was used computer programme Atena 3D Eng. For modeling the wall in computer programme it was adopted the basic properties for masonry infill from doctoral dissertation (Penava, 2012) . On that way, the parameters were established which have an effect for modelling frames with masonry and the dimensions of masonry.
This thesis compare the experiment from doctoral thesis with results from Atena 3D Eng. and six simplified approaches from different researchers for constructions under earthquake.
This thesis was produced in the scope of research project ''FRAme-MAsonry Composites for Modelling and Standardization (HRZZ-IP-2013-11-3013)'' from Croatian Science Foundation.
The results of this thesis will be used for an insight of the influence of masonry infill walls to the reinforced concrete frames. Taking the influence of infill under consideration will bring us to the more reliable estimates of existing and new buildings. |
| Parallel keywords (Croatian) | konstrukcijski sustav okvir-ziđe nelinearni proračun seizmički odziv konstrukcijskog sustava okvir-ziđe |
| Resource type | text |
| Access condition | Open access |
| Terms of use |  |
| URN:NBN | https://urn.nsk.hr/urn:nbn:hr:133:851438 |
