AN APPROACH TO ASSESSING THE STABILITY OF REINFORCED CONCRETE SLABS FOR FAST-FLOW SPILLWAY STRUCTURES, TAKING INTO ACCOUNT RELIABILITY INDICATOR

Abstract

A synthesized methodological approach to assessing the stability of reinforced concrete slabs anchoring a rapid-flow spillway structure based on the reliability indicators for surfacing and tipping is presented and tested using the example of a real-life hydraulic engineering structure in the Belogorsky district of the Republic of Crimea, which showed the objectivity of the results obtained, which is supported by the calculation of the Kohren consent criterion. A corresponding calculation has proved the existence of a strong directly proportional relationship between the flow rates of water at the end of the rapid flow and the fixed riverbed.

Subject of the study: the process of studying the stability of reinforced concrete structures for securing a rapid-flow spillway structure under the influence of a falling stream of water with significant kinetic energy capable of destroying individual elements of the structure.

 Materials and methods: the study was carried out based on the application of the following methods: analysis, which allowed for the improvement of a methodological approach to assessing the stability of spillway attachment structures; probabilistic, which allowed for the testing of the proposed approach, taking into account the confidence level of the reliability of the structure; correlation, which allowed to establish the degree of tightness between the flow rates of water at the end of the rapid flow and the fixed riverbed; comparative analysis, which made it possible to compare the parameters for calculating the stability of structural elements of high-speed flow, taking into account and without taking into account reliability.

 Results: the stability of reinforced concrete slabs of a rapid-flow spillway structure was calculated using a synthesized methodological approach using the example of a really working spillway structure of a hydroelectric power plant in the Belogorsky district of the Republic of Crimea, which showed the objectivity of the results obtained.

Conclusions: a methodological approach has been developed and tested to assess the stability of reinforced concrete slabs for fast-flow fastening of a spillway structure, based on a comparison of tipping and weighing moments, taking into account the indicator of the confidence probability of trouble-free operation of the structure.