Endurance of the wooden bridge reinforced by the dowel plates

Abstract

The most important piece of road infrastructure is bridges. Wooden bridges have advanced constantly during the past decades. The trend began in Scandinavian countries but has also now gained significant ground in Russia. This research studies experimental endurance potential of the joints of the wooden beam while considering the coefficient of asymmetry of the cycle, which corresponds to the actual operating conditions. Performance analysis of the composite bars is carried out based on the experiment; the development of a special methodology for calculating the joints of wooden elements with the dowel plates for their better endurance is also introduced in this paper. The results of experimental studies on the performance of bending composite wooden bridge bars based on dowel plates operating under cyclic influences thus determine the endurance limit of wood for composite wooden bridge beams based on dowel plates. The calculation technique and interdependence of the endurance coefficient affecting the asymmetry coefficient of the bent composite wooden bridge bars on the dowel plates under cyclic loading are considered. The experimental data on the endurance of composite wooden bridge beams have been obtained, and separate analysis has been made of the compounds under cyclic loading performance; a method has been developed for calculating the bent composite wooden bridge bars reinforced by the dowel plates under cyclic influences.

Working capability of composite wood-rubcon (rubber concrete) reinforced bridge beams under static loads

“…The standard deflection of the beam is 1/170 span, hence = 32,50 kN (12) The calculated load is equal to the minimum calculated by the formulae (8), (10), (12). Destructive load is determined by multiplying the design load value by the material safety factor γ м = 1,15, then .…”

“…At present, wood with large diameters has become scarce, from which bridge and transverse beams were made, as well as sleepers. The direction of work associated with the reinforcement of the tensile zone of wooden composite bridge beams is an urgent task, as it makes it possible to work with wood of small diameters [9][10][11][12].…”