| Title | NELINEARNI PRORAČUN KONSTRUKCIJSKOG SUSTAVA OKVIR-ZIĐE: ISPUNSKO ZIĐE S OTVOROM ZA VRATA POSTAVLJENIM EKSCENTRIČNO |
| Author | Magdalena Jozinović |
| Mentor(s) | Davorin Penava (thesis advisor)
|
| Abstract | Na osnovu dosadašnjih spoznaja o potresnim djelovanjima, konstrukcijski sustav okvir-ziđe sastoji se od seizmički otpornih elemenata, armiranobetonskog okvira i ispunskog ziđa. Nerijetko se u ispunskom ziđu nalaze otvori za prozore ili vrata, koji bitno utječu na seizmički odziv konstrukcijskog sustava. Do sada su razvijeni mnogi proračunski postupci za određivanje potresne otpornosti ovakvih konstrukcija, ali ne smiju se koristiti nekritično i bez opreza. Najčešće primjenjivani način modeliranja jest da se ispunsko ziđe predstavlja jednim dijagonalnim tlačnim štapom. Pri proračunu potrebno je odrediti širinu štapa, dok je debljina jednaka debljini zida. Takvim pristupom smanjuje se broj nepoznanica i znatno se ubrzava proračun. Postoji nekoliko načina određivanja širine dijagonalnog tlačnog štapa, a do danas nije utvrđeno koji od njih je najprikladniji te koji je način predviđanja odziva konstrukcijskog sustava okvir ziđe s i bez otvora u ziđu najsigurniji pri potresnom djelovanju. Ukoliko se umjesto modela tlačnog štapa koriste simulacije neelastičnog ponašanja pomoću proračunskih mikromodela, gdje se posebno modeliraju zidni elementi i spoj morta i zidnih elemenata, moguće je preciznije obuhvatiti različite vrste elemenata i morta te različite vrste, smještaje i veličine otvora. Proračunski su modeli vrlo složeni, a njihova su izrada i proračun dugotrajni pa je njihovo korištenje ograničeno na manje probleme. Također, zbog pouzdanosti ih je potrebno provjeriti eksperimentalnim ispitivanjima, što je skupo i dugotrajno.
Cilj ovog rada jest provesti nelinearni proračun prethodno eksperimentalno ispitanog modela konstrukcijskog sustava okvir-ziđe, u slučaju kada se u ispunskom ziđu nalazi otvor za vrata postavljen ekscentrično. Potrebno je izraditi prostorni model primjenom metode konačnih elemenata u računalnom programu ATENA 3D kako bi se odredila otpornost sustava u svojoj i okomito na svoju ravninu. Rezultati proračuna proračunskog mikromodela uspredit će se s rezultatima dobivenim pojednostavljenim proračunskim postupcima i rezultatima eksperimentalnih ispitivanja. |
| Keywords | construction system frame-masonry nonlinear analysis seismic response of frame-masonry construction system numerical micromodel eccentric door opening |
| Parallel title (English) | NONLINEAR ANALYSIS OF THE FRAME-MASONRY STRUCTURAL SYSTEM: MASONRY INFILL WALL WITH THE DOOR OPENING POSITIONED ECCENTRICALLY |
| Committee Members | Ivica Guljaš (committee chairperson)
Ivan Kraus (committee member)
Davorin Penava (committee member)
|
| Granter | Josip Juraj Strossmayer University of Osijek
Faculty of Civil Engineering |
| 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) | Based on previous earthquakes, construction system frame-masonry is consisted of seismic resistant elements, reinforced concrete frame and masonry wall. In masonry walls there are often openings for doors and windows, which have a great effect on seismic response of construction system. Many calculation procedures have been developed so far, but they should not be used uncritically and unadvisedly. The most common way of modelling such constructions is replacing infills with one diagonal compressive strut. In the analysis of such construction, it is necessary to determine the width of diagonal strut, while its thickness is equal to wall thickness. That kind of approach reduces the number of unknowns and eases the calculations. There are several approaches of determining diagonal strut thickness, but to date it is not determined which one is the most appropriate, and what way of predicting seismic response of frame-infill system with and without openings is the most confident. If simulations of nonelastic behaviour using numerical micromodels, where wall elements and joints between them are separately modelled, instead of the compression strut are used, it is possible to include different types of elements, mortar and different types, positions and dimensions of openings more precisely. Numerical models are complex and modelling and calculations take a lot of time, so their application is limited to fewer problems. Also, it is necessary to check reliability of such models using experimental tests, which is expensive and long lasting.
The aim of this paper is to perform nonlinear calculation of previously experimentally tested frame-masonry construction system in case when there is eccentric door opening in infill. It is necessary to develop spatial model using finite element method using Atena 3D Eng software, to determine the resistance of system in its plane and perpendicular to its plane. The results of analysis of numerical micromodel will be compared with the results of analytical calculations and results of experimental tests. |
| Parallel keywords (Croatian) | konstrukcijski sustav okvir-ziđe nelinearni proračun seizmički odziv konstrukcijskog sustava okvir-ziđe proračunski mikromodel ekscentrični otvor za vrata |
| Resource type | text |
| Access condition | Open access |
| Terms of use |  |
| URN:NBN | https://urn.nsk.hr/urn:nbn:hr:133:106102 |
