Pavel N. Smirnov
Pavel N. Smirnov

Pavel N. Smirnov
PhD of Sci. Tech., Head of the laboratory of wooden structures of TSNIISK named after V.A. Kucherenko of JSC RCC. Moscow, Russian Federation


Publications

Investigation of joints of prefabricated wooden structures with screw connections for calculating multi-storey buildings for dynamic loads
Issue: #6-2024
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Introduction. In the modern world practice of construction of multi-storey wooden buildings, a frame structural system is widely used. To ensure the stability of the frame of multi-storey buildings under transverse loads (wind or seismic), diaphragms and stiffening discs made of wooden structures are used, which are assembled to comply with transportation requirements. The problem of developing effective nodal joints for joints of prefabricated wooden structures with high rigidity to ensure the stability of the shape and position of the building, as well as plasticity to counteract seismic loads, is relevant for the development of multi-storey wooden housing construction. The rigidity of prefabricated wooden structures affects the distribution of forces in the elements of the building frame and the frequency of natural vibrations. The plasticity of the nodes in the joints determines the efficiency of energy dissipation by structures during seismic impacts on the building.

Aim. The study of the bearing capacity, rigidity, plasticity of joints with nodes on glue-screw rods and dynamic characteristics of prefabricated structures of multi-storey wooden buildings.

Materials and methods. According to the methods of GOST 33082 and GOST R 57160, a complex of experimental studies of the strength and deformation characteristics of joints of prefabricated structures of multi-storey buildings with nodes on glue-screw rods under monotonous and cyclic loads was carried out.

Results. The bearing capacity, stiffness coefficients, joint plasticity and dynamic characteristics of prefabricated structures with nodes on glue-screw rods are determined.

Conclusions. According to the results of the analysis of the conducted studies, it was found that the developed nodes with glue-screw rods connections for joints of prefabricated wooden structures meet the requirements of high rigidity and can be used for floor discs and wall diaphragms of multi-storey wooden buildings. The obtained values of plasticity coefficients and dynamic characteristics of joints with the developed nodes on glue-screw rods indicate their ability to effectively dissipate energy during seismic impacts, therefore they can be recommended for use in the design of wall diaphragms of multi-storey wooden buildings in areas with seismic hazard.

Research of strength and elastic characteristics of russian-made cross laminated timber slabs
Issue: #2-2022
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the current state and experience of foreign researches of cross-laminated wood as products for the construction industry are analyzed. The basic principles of production of CLT material and its design features, as well as the advantages of CLT structures in comparison with traditional structural materials are given. The reasons limiting the use of this material in the Russian Federation are indicated. The results of research work are presented, the purpose of which was to study the strength and elastic characteristics of a new structural material made of CLT by conducting experimental studies to determine the bearing capacity of structures made of CLT, as well as the development of modern standard test methods for determining the bearing capacity of structures made of CLT, as a bimodular orthotropic material. Information is provided on the test methodology used and the results of experimental studies to determine the floor slabs bearing capacity in bending out of the plane of the sheet; wall panels load-bearing capacity in compression in the plane of the sheet and determination of the wall panels rigidity  in shear in the plane of the sheet for samples with different grades of wood, the number and layuot of outer layers. The data of experimental tests of CLT samples to determine the floor slabs bearing capacity for bending and wall panels for compression and their rigidity in compression are presented, the nature of deformation and destruction depending on the design features of the CLT material is studied. The prospects for using the results of the work in the development of normative-technical and organizational-methodical documents are determined.