Analitičko ispitivanje ponašanja na interfejsu kod prednapregnute betonske grede ojačane prednapregnutom pločom vezanom kompozitnim materijalima
Sažetak
Uvod/cilj: Upotreba kompozitnih materijala za armiranje armiranobetonskih konstrukcija danas je veoma česta u oblasti građevinarstva. Međutim, ovaj metod se obično ne koristi kod prednapregnutih betonskih konstrukcija. Osnovni cilj ovog rada jeste da proširi upotrebu kompozitnih materijala na armiranje prednapregnutih betonskih greda uzimajući u obzir uticaj koncentracije napona na interfejsu na ukupno ponašanje ovih konstrukcija.
Metode: Predlaže se novi analitički model koji uzima u obzir način na koji prednapregnutost prednapregnutih betonskih greda utiče na napone na interfejsu. Razmatra se polinomska funkcija koja izražava varijaciju geometrijskog oblika kabla, kao i trenutne i netrenutne gubitke prednapregnute betonske grede radi rešavanja pitanja koncentracije napona na interfejsu vezivo-ploča-beton.
Rezultati: Glavni nalazi ovog ispitivanja pokazuju da se, u prisustvu prednapregnutosti kabla, naponi na interfejsu neznatno smanjuju. Međutim, sa povećavanjem sile prednaprezanja primenjene na FRP ploču uočava se znatnije povećanje napona na interfejsu.
Zaključak: Usled visokog stepena kontaktnih napona na kraju ploče, rizik od odvajanja postaje veći, pa se preporučuje mehanizam za ankerisanje na ivici ploče.
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Sva prava zadržana (c) 2025 Hanane Mebsout, Mohamed Atif Benatta, Baghdad Krour, Oussama Benachour, Mohamed Bachir Bouiadjra, Nacer Rahal

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