66790 KB1193 KB0 KB2018Brank, BoštjanGams, MatijaJarc Simonič, MojcaRajčić, VlatkaUranjek, MojmirŽarnić, RokoXLIV, 430 str., 30 cmCOBISSID:8365153PID:https://repozitorij.uni-lj.si/IzpisGradiva.php?id=104828URN:URN:NBN:SI:doc-XMQLIF4MslM. Jarc Simoničvisokošolska delacalculating modelcivil engineeringDisertacijefinal displacementFRMFRPgradbeništvokončni pomikmasonryojačevanjeOpečni zidoviPotresna odpornostpreiskave stika opeka - FRPračunski modeliseismic resistanceshear testsSREMBstrengtheningstrižne preiskavesustainable renovationtests of brick - FRP contactthesistrajnostna obnovaUtrditevzidoviUčinki utrditve opečnih zidov s plastikami, armiranimi z vlakni| doctoral thesis| doktorska disertacija| Effects of strengthening brick masonry walls with FRP|The scope of doctoral dissertation is research of the seismic resistance of masonry buildings, reinforced with FRP (fiber reinforced polymer) and FRM (fiber reinforced mortar). Several systems for strengthening of old brick walls were tested in-situ and new stone walls in the laboratory. The efficiency of the bond of the brickwork and composite coverings at shear forces for all systems were further investigated in small clay samples in the laboratory. The results of in-plane shear tests have shown good performance of strengthening by horizontal reinforcing carbon strips and glass mesh in a modified cement mortar, however reinforcement with diagonal carbon strips was less effective. Investigations of shear contact on small brick samples with FRP/FRM cover led to the conclusion that for the efficient strengthening the good basis preparation and sound anchoring of the ends of the strips are necessary. The objective of the own experimental investigations and in-depth study of this scientific field was the evaluation of the existing calculation models and the integration of improved model in the software for computation of seismic resistance of masonry buildings. Nonlinear seismic analysis of the building performed based on newly developed computational model, shows that for the unreinforced building the earthquake resistance can be determined well, just as high as the TREMURI framework mechanism because the new calculation model has been improved. In addition, the new calculating model in SREMB can also be used to calculate buildings strengthened with FRP / FRM materials, horizontal, vertical, diagonal and all possible combinationsPodročje raziskovanja doktorske disertacije je potresna odpornost zidanih stavb, ojačenih s FRP (fibre reinforced polymer - z vlakni armirani polimer) in FRM (fibre reinforced mortar - z vlakni armirana malta). V sklopu preiskav smo načrtovali in in-situ preskušali več sistemov ojačevanja starih opečnih zidov ter novih kamnitih zidovih v laboratoriju. Učinkovitost povezave zidovja in kompozitnih oblog pri strižni obremenitvi smo za vse sisteme dodatno preiskovali na manjših opečnih vzorcih v laboratoriju. Rezultati strižnih preiskav v ravnini zidov so pokazali, da je ojačevanje s horizontalnimi karbonskimi trakovi na epoksidnem lepilu ter stekleno mrežico v modificirani cementni malti, učinkovito, ojačitev z diagonalnimi karbonskimi trakovi pa manj. Preiskave strižnega stika so pripeljale do spoznanja, da je nujna kvalitetna priprava podlage in izvedba dobrega sidranja koncev trakov. Cilj izvedbe lastnih eksperimentalnih preiskav ter poglobljene študije tega znanstvenega področja je bil ovrednotenje obstoječih računskih modelov, izpeljava izboljšanega modela ter integracija tega v računalniški program za računanje potresne odpornosti zidanih stavb. Nelinearna potresna analiza stavbe z etažnim mehanizmom s programom SREMB, izvedena na osnovi novorazvitega računskega modela, kaže, da lahko za neojačano stavbo dobro določimo potresno odpornost, ki je v primerjavi z okvirnim mehanizmom TREMURI ravno za toliko višja, kot je izboljšan nov računski model. Dodatno lahko z novim računskim modelom s programom SREMB preračunamo tudi zgradbe, katerih zidovi so ojačeni s poljubnimi ojačitvami s FRP/FRM materiali - horizontalnimi, vertikalnimi, diagonalnimi in vsemi možnimi kombinacijamiTEXTvisokošolska delatheses and dissertationsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za gradbeništvo in geodezijo