Analitičko ispitivanje ponašanja na interfejsu kod prednapregnute betonske grede ojačane prednapregnutom pločom vezanom kompozitnim materijalima

  • Hanane Mebsout Univerzitet „Mustafa Stamboli”, Maskara, Narodna Demokratska Republika Alžir https://orcid.org/0009-0003-5837-4144
  • Mohamed Atif Benatta Univerzitet „Đilali Liabes”, Laboratorija za napredne konstrukcije i materijale u građevinarstvu i javnim radovima (LSMAGCTP), Sidi Bel Abes, Narodna Demokratska Republika Alžir https://orcid.org/0009-0007-5854-9054
  • Baghdad Krour Univerzitet „Đilali Liabes”, Laboratorija za napredne konstrukcije i materijale u građevinarstvu i javnim radovima (LSMAGCTP), Sidi Bel Abes, Narodna Demokratska Republika Alžir https://orcid.org/0000-0002-8265-9807
  • Oussama Benachour Univerzitet „Đilali Liabes”, Laboratorija za napredne konstrukcije i materijale u građevinarstvu i javnim radovima (LSMAGCTP), Sidi Bel Abes, Narodna Demokratska Republika Alžir https://orcid.org/0009-0003-3792-7424
  • Mohamed Bachir Bouiadjra Univerzitet „Đilali Liabes”, Laboratorija za napredne konstrukcije i materijale u građevinarstvu i javnim radovima (LSMAGCTP), Sidi Bel Abes, Narodna Demokratska Republika Alžir + Tematska agencija za istraživanje nauke i tehnologije, Alžir, Narodna Demokratska Republika Alžir https://orcid.org/0009-0008-4814-6187
  • Nacer Rahal Univerzitet „Mustafa Stamboli”, Maskara, Narodna Demokratska Republika Alžir + Univerzitet prirodnih nauka i tehnologije, Laboratorija za mašinske strukture i stabilnost konstrukcije, Oran, Narodna Demokratska Republika Alžir https://orcid.org/0009-0002-0400-8360
Ključne reči: prednapregnuta betonska greda, FRP kompoziti, naponi na interfejsu, orijentacija vlakana, ojačavanje

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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Objavljeno
2025/03/28
Rubrika
Originalni naučni radovi