Abstract
Introduction. Experience in the design and construction of beam structures of wooden bridges with composite girders indicates the possibility of increasing the bearing capacity and the length of the overlapped spans.Materials and methods. The most rational load-bearing elements of composite girders can serve as the logs edged on two edges with the diameter of 28 to 32 cm with the maximum use of the most durable layers of sapwood and dowel connections of steel plates with blind cylindrical nags.Results. In contrast to the compounds of composite girders on lamellar nails, the proposed connection greatly simplifies the process of making the composite girders. Such connection also allows using the logging along the length, combining into three or four tiers and increasing the length of the span.Discussion and conclusion. The proposed solutions increase the load-bearing capacity of composite girders and allow them to be used in the structures of wooden bridges under modern automotive loads. Moreover, the calculation method of composite girders on the basis of the method of forces and discrete placement in the beams between the logs of concentrated elastic-datum shear bonds is developed.
Highlights
Experience in the design and construction of beam structures of wooden bridges with composite girders indicates the possibility of increasing the bearing capacity
load-bearing elements of composite girders can serve as the logs edged on
the proposed connection greatly simplifies the process of making the composite girders
Summary
Proektirovanie derevyannyh mostov [Design of wooden bridges]. 2. Utkin V.A., Puzikov V.I., Kobzev P.N. Opyt vnedreniya novyh doshchato-gvozdevyh proletnyh stroenij v dorozhnom stroitel’stve. Omskoj oblasti [Experience in the implementation of new board-and-nail structures in the road construction in Omsk region]. 3. Utkin V.A., Puzikov V.I., Kazantsev B.V., Karetnikov M.YU. O primenenii drevesiny dlya stroitel’stva mostov [On the use of wood for bridge construction]. 4. Nikolai B.L. Teoriya rascheta nagel’nyh sopryazhenij v derevyannyh konstruktsiyah [Theory of calculation of the dowel mates in wooden structures].
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