Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Structural behaviour of folded timber sandwich structures
https://orcid.org/0000-0002-0180-4794
https://orcid.org/0000-0002-0878-583X
Abstract This paper aims to characterise the mechanical behaviour of folded timber sandwich structures developed using integral rotational press-fit (RPF) joints. Six folded arches are tested to failure, under three load cases designed to induce different sagging and hogging conditions at internal joints. Experimental testing showed failures occurring at joint locations with maximum hogging moment, with two failure types observed as FRP tensile fracture and core compressive rupture. A nonlinear static analysis and simplified 2D frame model is proposed to predict moment distribution and failure load for FRP fracture modes. This model characterises the RPF joint as a nonlinear semi-rigid hinge, with assigned bilinear moment–curvature relation obtained from analysis of joint strain data collected during arch testing. Core compressive failures are shown to occur as an inelastic core buckling behaviour when there is misalignment between assembled core segments.
Highlights Six folded sandwich arches assembled with rotational press-fit (RPF) integral joints. Structural behaviour is governed by strength and semi-rigid stiffness of RPF joints. A simplified numerical analysis estimates strength and load distribution behaviour. Numerical models predict load capacity for tensile FRP or compressive timber failure.
Structural behaviour of folded timber sandwich structures
https://orcid.org/0000-0002-0180-4794
https://orcid.org/0000-0002-0878-583X
Abstract This paper aims to characterise the mechanical behaviour of folded timber sandwich structures developed using integral rotational press-fit (RPF) joints. Six folded arches are tested to failure, under three load cases designed to induce different sagging and hogging conditions at internal joints. Experimental testing showed failures occurring at joint locations with maximum hogging moment, with two failure types observed as FRP tensile fracture and core compressive rupture. A nonlinear static analysis and simplified 2D frame model is proposed to predict moment distribution and failure load for FRP fracture modes. This model characterises the RPF joint as a nonlinear semi-rigid hinge, with assigned bilinear moment–curvature relation obtained from analysis of joint strain data collected during arch testing. Core compressive failures are shown to occur as an inelastic core buckling behaviour when there is misalignment between assembled core segments.
Highlights Six folded sandwich arches assembled with rotational press-fit (RPF) integral joints. Structural behaviour is governed by strength and semi-rigid stiffness of RPF joints. A simplified numerical analysis estimates strength and load distribution behaviour. Numerical models predict load capacity for tensile FRP or compressive timber failure.
Structural behaviour of folded timber sandwich structures
https://orcid.org/0000-0002-0180-4794
https://orcid.org/0000-0002-0878-583X
Abstract This paper aims to characterise the mechanical behaviour of folded timber sandwich structures developed using integral rotational press-fit (RPF) joints. Six folded arches are tested to failure, under three load cases designed to induce different sagging and hogging conditions at internal joints. Experimental testing showed failures occurring at joint locations with maximum hogging moment, with two failure types observed as FRP tensile fracture and core compressive rupture. A nonlinear static analysis and simplified 2D frame model is proposed to predict moment distribution and failure load for FRP fracture modes. This model characterises the RPF joint as a nonlinear semi-rigid hinge, with assigned bilinear moment–curvature relation obtained from analysis of joint strain data collected during arch testing. Core compressive failures are shown to occur as an inelastic core buckling behaviour when there is misalignment between assembled core segments.
Highlights Six folded sandwich arches assembled with rotational press-fit (RPF) integral joints. Structural behaviour is governed by strength and semi-rigid stiffness of RPF joints. A simplified numerical analysis estimates strength and load distribution behaviour. Numerical models predict load capacity for tensile FRP or compressive timber failure.
Structural behaviour of folded timber sandwich structures
Alqaryouti, Yousef (Autor:in) / Fernando, Dilum (Autor:in) / Gattas, Joseph M. (Autor:in)
Thin-Walled Structures ; 169
18.08.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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