Behaviour of Timber-Concrete Joints in Hybrid Members Subjected to Flexure

• Published in: IOP conference series. Materials Science and Engineering 2019-11, Vol.660 (1), p.12050
• Main Authors: Vasiljevs, R, Serdjuks, D, Gerasimova, J, Buka-Vaivade, K, Orhun Erüz, A
• Format: Article
• Language: English
• Subjects: Bearing strength; Concrete; Crushing; Diameters; Flexing; Granite; Load carrying capacity; Screws; Thickness
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/660/1/012050

Possibility to develop rigid timber-concrete joint for hybrid timber-concrete specimens was stated. Behaviour of timber-concrete rigid and compliant joints were evaluated numerically and by experiment for the members subjected to flexure. Small scale hybrid timber-concrete specimens with the length, width and thickness equal to 400, 95 and 43 mm were investigated for case of three points bending. The small-scale hybrid timber-concrete specimens consists from the layers of cement base finishing mass Sacret BAM and timber boards of strength class C24 with thicknesses equal to 25 and 18 mm, correspondingly. The rigid timber-concrete joint was provided by the pieces of crushed granite, which were strengthened on the surface of the timber boards by epoxy glue Sica Dur 330. Dimensions of the crushed granite pieces changes within the limits from 2 to 25 mm. The compliant timber-concrete joint was provided by the screws with diameter and length equal to 4 and 40 mm, correspondingly. The screws were placed under the angles equal to 45 and 90 degrees relatively to the direction of fibres of the timber layers. Load-carrying capacity and maximum vertical displacements were gotten for groups of small-scale hybrid timber-concrete specimens with rigid and compliant timber-concrete joints. It was shown that providing of rigid timber-concrete joint enables to decrease 1.86 - 3.50 times the maximum vertical displacements of hybrid timber-concrete specimens. Load-carrying capacity of the specimens grows by 16.5 - 50.0% at the same moment.