Uticaj skupljanja, temperature i stepena sprezanja (N/Nf) na ponašanje spregnutog čelično-betonskog nosača

  • Halima Aouad Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, Maskara, Narodna Demokratska Republika Alžir https://orcid.org/0009-0004-1999-1489
  • Nacer Rahal Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, 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
  • Houda Beghdad Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, Maskara, Narodna Demokratska Republika Alžir https://orcid.org/0009-0001-3548-5138
  • Mohamed Sadoun Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, Maskara, Narodna Demokratska Republika Alžir https://orcid.org/0009-0008-2314-9402
  • Abdelaziz Souici Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, 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/0009-0004-3845-7409
  • Sara Zatir Univerzitet „Tahri Mohamed Bešar”, Odeljenje za arhitekturu i urbanizam, Bešar, Narodna Demokratska Republika Alžir https://orcid.org/0000-0002-6187-3441
  • Khaled Benmahdi Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, Maskara, Narodna Demokratska Republika Alžir https://orcid.org/0000-0002-8244-5817
DOI: https://doi.org/10.5937/vojtehg73-50812
Ključne reči: stepen sprezanja (N/Nf), skupljanje, vreme, interfejs čelik-beton

Sažetak


Uvod/cilj: Temperatura i efekti zavisni od vremena, kao što su tečenje i skupljanje betona, znatno utiču na ponašanje spregnutih nosača od čelika i betona. Stoga je neophodno uzeti u obzir zahteve ovih dodatnih efekata koji su predmet različitih teorijskih i numeričkih istraživanja. U ovoj studiji predlaže se analitički alat sposoban da predvidi novu preraspodelu napona prouzrokovanu kombinovanim delovanjem temperature i skupljanja betona u spregnutim čelično-betonskim nosačima u parcijalnom smičućem spoju. Takođe, uzima se u obzir parcijalni smičući spoj na interfejsu čelik-beton prema stepenu sprezanja (N/Nf).

Metode: Preformulisan je model koji su Rahal i saradnici predložili 2024. godine analizirajući ponašanje spregnutih čelično-betonskih nosača u punom sprezanju pod uticajem temperature i skupljanja betona. Glavni doprinos ove studije predstavlja uvođenje uticaja stepena sprezanja (N/Nf) na interfejsu čelik-beton. Time se dolazi do analitičkog modela sposobnog da predvidi dodatna naprezanja usled skupljanja i temperature u spregnutim čelično-betonskim gredama u parcijalnom smičućem spoju.

Rezultati: U odnosu na model koji su Rahal i saradnici predložili 2024. godine, ispostavilo se da su rezultati pristupa iz studije zadovoljavajući. Oni jasno pokazuju da stepen sprezanja značajno utiče na sile nastale kombinovanim delovanjem skupljanja betona i temperature.

Zaključak: Rezultati navedenog pristupa dobro se slažu sa rezultatima postojećeg modela koji su razvili Rahal i saradnici. Jasno se pokazuje uticaj skupljanja betona i temperature u funkciji stepena sprezanja (N/Nf) na ponašanje spregnutih čelično-betonskih nosača.

 

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Objavljeno
2025/02/02
Broj časopisa
Vol. 73 Br. 1 (2025): januar - mart
Rubrika
Originalni naučni radovi

Sva prava zadržana (c) 2025 Halima Aouad, Nacer Rahal, Houda Beghdad, Mohamed Sadoun, Abdelaziz Souici, Sara Zatir, Khaled Benmahdi

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