Strižne napetosti v elastičnih dvoslojnih lesenih nosilcih z upoštevanjem zdrsa med slojema

Čas, Bojan (author)

V članku analiziramo vpliv zdrsa med slojema na mehansko obnašanje dvoslojnih kompozitnih prostorskih nosilcev. Podrobno nas zanima predvsem vpliv podajnosti stika slojev na razporeditev in velikost strižnih napetosti v prečnih prerezih dvoslojnih lesenih nosilcev. Strižne napetosti v slojih izračunamo na tri načine: (i) z razvitim matematičnim modelom in pripadajočimi analitičnimi rešitvami, (ii) z računsko metodo, kot jo predlaga veljavna zakonodaja s področja lesenih konstrukcij, standard Evrokod 5 [SIST, 2005], ter (iii) s predlagano modificirano enačbo omenjenega standarda za izračun strižnih napetosti. Primerjava razporeditve in velikosti strižnih napetosti v slojih je pokazala dobro ujemanje med rezultati matematičnega modela ter rezultati ustrezno modificirane enačbe standarda Evrokod 5 [SIST, 2005].

• Language: Slovenian
• Keywords: 3D-nosilci, elastičnost, kompoziti, zdrs, les, analitična rešitev, strižne napetosti
• Work type: Scientific work
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2020
• Number of pages: Str. 286-295
• Numbering: Letn. 69
• PID: 20.500.12556/RUL-124729
• UDC: 624.011.1+624.042
• ISSN on article: 0017-2774
• COBISS.SI-ID: 41762819
• Publication date in RUL: 13.02.2021

Record is a part of a journal

• Title: Gradbeni vestnik : glasilo Zveze društev gradbenih inženirjev in tehnikov Slovenije
• Shortened title: Gradb. vestn.
• Publisher: Zveza društev gradbenih inženirjev in tehnikov Slovenije
• ISSN: 0017-2774
• COBISS.SI-ID: 859140

Secondary language

• Language: English
• Title: Shear stresses in elastic timber composite two-layer beams with interlayer slips

Abstract

his article focuses on three-dimensional two-layer composite beams with slips between the layers. The effect of contact stiffness on shear stresses in composite beam cross-section is studied in detail. Shear stresses are calculated by the application of: (i) a presented mathematical model with analytical solution, (ii) calculation method for layered timber beams with interlayer slips, as proposed by Eurocode 5 [SIST, 2005] and (iii) a suggested modified equation of the abovementioned standard for the calculation of shear stresses in timber composite beam cross-section. The comparison of the distribution and values of shear stresses in composite cross-section shows a good agreement of the results obtained by the presented mathematical model with the results calculated by the proposed modified Eurocode 5 [SIST, 2005] equation.

• Keywords: 3D beams, elasticity, composites, slip, timber, analytical solution, shear stress