<p>U ovoj disertaciji, izvršena su teorijska i eksperimentalna istraživanja dinamičkog onašanja jezgra visokih zgrada. Model je zasnovan na Vlasovoj teoriji tankozidnih nosača, kao i na metodi prenosnih matrica. Jezgro se tretira kao tankozidni nosač otvorenog poprečnog preseka, koji je na dnu uklješten u temeljnu ploču, dok je na vrhu slobodan. Duž ose smicanja, jezgro je podeljeno na čvorove u nivoima spratova u kojima su redukovane mase. Poseban naglasak je stavljen na analizu uticaja poprečnih greda, međuspratnih ploča, kao i načinu oslanjanja međuspratnih ploča po spoljašnjoj konturi na dinamičke karakteristike jezgra. Razvijeni numerički postupak je primenjen na armiranobetonskom jezgru petnaestospratne zgrade, koja je analizirana ranijeu radovima mnogih autora. U tu svrhu korišćen je računarski program TWBEIG, napisan primenom Visual Fortran programskog jezika. Analize su urađene i MKE, a dobijeni rezultati su upoređeni. Vrednosti sopstvenih frekvencija pokazuju dobro slaganje.<br />Ovaj rad daje detalje i o eksperimentalnoj studiji u kojoj se primenjuje pleksiglas model u cilju pružanja eksperimentalnih podataka zaproveru tačnosti i pouzdanosti numeričkih rezultata. Dobijeni rezultati su takođe upoređeni sa rezultatima dobijenim TWBEIG računarskim programom, kao i MKE.<br />Predstavljeni numerički metod nudi solidnu osnovu za formiranje jednostavnog modela proračuna, a ipak obezbeđuje odgovarajući nivo preciznosti. Predloženi postupak može biti korišćen i u fazi prethodne analize zgrade, kao i u fazi konačnog projektovanja.</p> / <p>In this dissertation, a theoretical and experimental study of the dynamic behaviour<br />of the tall buildings core was carried out. The model is based on the Vlasov's<br />theory of thin-walled beams and the transfer matrixmethod. The core is treated as<br />a thin wall-walled, open cross section cantilever beam. Along the shear axis the<br />core is divided into nodes, in the level of the floors, in which the masses are<br />reduced. Special emphasis was given to the analysis of the influence, of lintel<br />beams, floor slabs, as well as the type of restraints along the outer edge of the<br />floor slabs, on the dynamic characteristics of the core.<br />The developed numerical procedure was applied to the fifteen-storey reinforced<br />concrete core tall building, analyzed previously inthe papers of many authors. For<br />this purpose, the computer program TWBEIG was used, written using Visual<br />Fortran programming language. The analyses were also performed with FEM and<br />subsequently the results were compared. The values of natural frequencies show<br />significant agreement. This paper presents details about the experimental study which applies the plexiglas model in order to provide experimental data to verify the accuracy and reliability of the numerical results. The results are also compared with the results obtained with the TWBEIG computer program, as well as with FEM. The values of frequencies show reasonable agreement.<br />The proposed numerical method offers a solid base for the creation of a simple<br />calculation model, yet provides the appropriate level of precision. It can be either<br />used for preliminary analysis or for the final design.</p>
| Identifer | oai:union.ndltd.org:uns.ac.rs/oai:CRISUNS:(BISIS)104682 |
| Date | 12 September 2016 |
| Creators | Varju Đerđ |
| Contributors | Prokić Aleksandar, Lađinović Đorđe, Bešević Miroslav, Brčić Stanko, Miličić Ilija |
| Publisher | Univerzitet u Novom Sadu, Građevinski fakultet u Subotici, University of Novi Sad, Faculty of Civil Engineering at Subotica |
| Source Sets | University of Novi Sad |
| Language | Serbian |
| Detected Language | English |
| Type | PhD thesis |
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