Pojednostavljena formulacija za procenu sila nastalih skupljanjem u spregnutim gredama od čelika i betona s potpunim smičućim spojem

  • Nacer Rahal Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, Maskara; 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
  • Abdelaziz Souici Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, Maskara; 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”, 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
  • Halima Aouad Univerzitet „Mustafa Stamboli”, Odsek za građevinarstvo, Maskara, Narodna Demokratska Republika Alžir https://orcid.org/0009-0004-1999-1489
Ključne reči: skupljanje, beton, čelik, vreme, pojednostavljeni pristup

Sažetak


Uvod/cilj: Poznato je da pojave zavisne od vremena, poput puzanja i skupljanja betona, znatno utiču na ponašanje kompozitnih greda od čelika i betona. Zbog toga je veoma važno da se uzmu u obzir prilikom izračunavanja snage i sigurnosti kompozitnih greda od čelika i betona. Mnoga teorijska i numerička istraživanja imaju za cilj kontrolisanje ovih pojava. U većini tih istraživanja zastupljeni su komplikovani procesi i izračunavanja koji zahtevaju složene tehnike.

Metode: Ovaj model kombinuje jednačine statičke ravnoteže i dve relacije kompatibilnosti, po zakrivljenosti i po deformaciji, poprečnog preseka kompozitne grede od čelika i betona sa diferencijalnom jednačinom nastalom kao rezultat teorije brzine puzanja (CRM). Ideja je da se ovaj model pojednostavi kako bi se izbegle komplikovane matematičke transformacije.

Rezultati: Rezultati pojednostavljenog pristupa su veoma zadovoljavajući u poređenju sa rezultatima analitičkog modela.

Zaključak: Da bi se izbegao veliki broj računskih operacija i različite teškoće koje prate analitičke ili numeričke metode pri proceni dodatnog naprezanja usled skupljanja betona u kompozitnim gredama od čelika i betona, ovaj rad predlaže pojednostavljenu analitičku metodologiju uz obezbeđivanje zahtevane sigurnosti. Pokušano je pojednostavljivanje postojećeg analitičkog modela zasnovanog na teoriji linearne viskoelastičnosti iz 2012. godine.

Reference

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2024/06/10
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