The purpose of the research was to create a finite-element model for the design of hydraulic structures (in particular, water conduits, crossings) based on field observations of the technical condition of the structure using modern software products. A water conduit-crossing was examined and defects were revealed: the maximum deflection is 13 mm across the plate, there are cracks with opening widths up to 7 mm on the structures, cracks with depths of development up to 240 mm, corrosion of the first and second types, the depth of carbonization of concrete is 25 mm for the span, and 41 mm for the supporting part. Mathematical modeling of the water conduit-crossing was performed using the Stark ES multifunctional software package (version 2018) on the basis of regulatory documents. The initial data for the calculation are: standard wind pressure – 0.38 kPa; estimated snow pressure – 1.2 kPa; seismicity of the construction site – 9 points. Loads with the current scheme are summarized in the table. The results of the construction efforts are obtained. A comparison of the values of reinforcement and deflections obtained during the inspection of the object and calculated ones was carried out. As a result of the comparison it was revealed that the stock of reinforcement of the element during the inspection of the structure is 6.76 %, the deflection of the element is 57.9 % of the design standard value. With an increase in design loads by 10 %, the maximum values of the reinforcement of cross-sectional area are 38.45 square centimeters per meter, therefore, the required reinforcement exceeds the actual one by 1.14 %, which indicates the maximum permissible load values, which are: from a two-axle bogie with an axial load – 273 kN; from uniformly distributed load AK – 9.66 kPa; from NK18 in the form of a four-axle bogie – 388.08 kN.
Keywords: hydraulic structure, corrosion, mathematical modeling, numerical calculation, finite element model.
DOI: 10.31774/2222-1816-2019-2-85-103
COMPUTATIONAL MODELING OF BRIDGE CROSSING STATE IN INTRAFARM OF RECLAMATION SYSTEM / G. V. Degtyarev, T. I. Safronova, R. B. Gol’dman, O. G. Degtyareva // Scientific Journal of Russian Scientific Research Institute of Land Improvement Problems [Electronic resource]. – 2019. – ? 2. – P. 85–103. – Mode of access: http:www.rosniipm-sm.ru/en/archive?n=587&id=593. – DOI: 10.31774/2222-1816-2019-2-85-103.
