drvene konstrukcije-predavanja
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montažne konstrukcije predavanje! 4 god gradjevinske skoleTRANSCRIPT
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GRAĐA DRVETA I OSOBINE GRAĐEVINSKOG DRVETA
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FIZIČKE OSOBINE DRVETA
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VLAŽNOST DRVETA
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MASA DRVETA TERMIČKE KARAKTERISTIKE DRVETA
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UTEZANJE I BUBRENJE
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MEHANIČKE OSOBINE DRVETA
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OTPORNOST NA ZATEZANJE
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OTPORNOST NA PRITISAK
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OTPORNOST NA SAVIJANJE
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OTPORNOST NA SMICANJE
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TEČENJE DRVETA
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OTPORNOST NA TORZIJU
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SPOJEVI I VEZE
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TEHNIČKA LEPILA
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STANDARDNI OBLICI NOSAČA OD LEPLJENOG LAMELIRANOG DRVETA
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MEHANIČKA SPOJNA SREDSTVA
EKSERI
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Međusobni položaj para naspramno zabijenih eksera u ostvarenoj veziMeđusobni položaj para naspramno zabijenih eksera u ostvarenoj vezi
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VIJCI ZA DRVO
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VIJCI
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TRNOVI
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METALNE KLAMFE
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Geometrijski prikaz rasporeda klamfi u vezi
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KONEKTERI
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Organizacija čvorne veze metalnim konektorima
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MOŽDANICI
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NASTAVCI I VEZE ELEMENATA DRVENIH KONSTRUKCIJA
KRUTE VEZE
Izvođenje veza i spojeva elemenata krutog ugla statičkog sistama podrazumeva prihvatanje, prenos i preuzimanje sve tri čvorne sile na krajevima štapova N-normalne sile, Q-transverzalne sile i M-momenata sile. Takva veza veoma se retko izvodi u drvenim konstrukcijama. Za uspešno ostvarivanje neophodnih uslova sigurnosti i dozvoljenih deformacija cele konstrukcije potrebno je ispuniti veliki broj oštrih uslova, što najčešće nije tehnički ili izvođački moguće.
ZGLOBNE VEZE
Pod zglobnom vezom dvaju ili više elemenata konstrukcije u jedom čvoru podrazumeva se ona veza koja može da prihvati i prenese samo N-normalne sile i Q-transverzalne sile.Takva veza nije u stanju da prihvati momente savijanja, što znači da ničim nije sprečena rotacija štapova oko ose čvora.Ovakva veza najviše odgovara drvetu i obezbeđuje potpuno, sigurno i efikasno spajanje opterećenih elemenata u čvoru bez značajnih deformacija.
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KONSTRUKCIJA PROSTOG PREDNJEG ZASEKA – PRAVI ZASEK
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KONSTRUKCIJA PROSTOG PREDNJEG ZASEKA – KOSI ZASEK
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KONSTRUKCIJA PROSTOG ZADNJEG ZASEKA
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KONSTRUKCIJA DVOJNOG ZASEKA
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ZA GRAFIČKI