Reinforcement Technology of Laminated Wood Structures by Gang Nail

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UDС

624.078.4; 624.011.22

DOI:

10.17238/issn0536-1036.2018.1.80

Abstract

Violation of operation modes, manufacturing technology, and force effects in laminated wood constructions of buildings and structures cause defects and damages that reduce their strength and deformation characteristics. The most common defect is the delamination of glue joints with the formation of longitudinal cracks leading to the pre-emergency state of structures, which requires their additional reinforcement. The existing methods of strength-ening are technologically complex and involve the dismantling of defective elements or structures with their replacement by new ones, which leads to additional costs for repair and restoration. Therefore, the use of modern technological solutions to reinforce solid and laminated wood structures is an urgent problem of the construction industry. The strengthening process include three stages: inspection, design and installation works. The inspection stage involves determining all the required parameters for the gain design. To assess the effect of cracks on the bearing capacity of the structure we propose to use a hinged-rod model with glued wood as an anisotropic elastic body with a crack appeared by removing the shear bonds from the discrete system. Based on calculations, the author select the size, step, quan-tity and nail gang type, taking into account the compliance of the joint. We consider options for reinforcing laminated wood structures, methods of nail gang pressing at the design mark, the performing technology. The proposed gang nail reinforcement technologies of laminated wood structures with longitudinal cracks allow reducing the consumption of structural lumber.

Authors

A.V. Karel'skiy, Candidate of Engineering Sciences
T.P. Zhuravleva, Postgraduate Student
V.V. Filippov, Student
B.V. Labudin, Doctor of Engineering Sciences, Professor
V.I. Melekhov, Doctor of Engineering Sciences, Professor

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 22, Arkhangelsk, 163002, Russian Federation; е-mail: KAW_79@mail.ru

Keywords

wood, laminated wood structure, gang nail, hinged-rod model, glueline defect, delamination, reinforcement

For citation

Karel'skiy A.V., Zhuravleva T.P., Filippov V.V., Labudin B.V., Melekhov V.I. Reinforcement Technology of Laminated Wood Structures by Gang Nail. Lesnoy zhurnal [Forestry journal], 2018, no. 1, pp. 80–88. DOI: 10.17238/issn0536-1036.2018.1.80

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Received on 19.09.17