Kovalchuk V. Carrying capacity of transport constructions made of corrugated metal structures under operating conditions

The object of the research is transport constructions made of corrugated metal structures; the purpose of the study is to develop methods of assessing and increasing the bearing capacity of transport constructions made of corrugated metal structures (CMS), which are exposed to static and dynamic loads from vehicles and temperature and climatic influences of the environment; the research method is the finite element method of determining the bearing capacity of CMS under static and dynamic loads and climatic temperature effects; the finite difference method for estimating the temperature field distribution in CMS; methods of the theory of elasticity for thermoelastic state of CMS determination; methods of digital signal processing for processing the results of experimental studies of soil backfill density of transport facilities with CMS; methods of field tests of CMS using analog-to-digital converter, strain gauges, microcontrollers and accelerometers; the results: the comprehensive methodology for assessing the load-bearing capacity of transport facilities with CMS has been developed; new data on the influence of the degree of compaction of soil backfill on the bearing capacity of transport facilities with MCS were obtained; new devices have been developed to determine the degree of compaction of soil backfill around buildings with CMS; experimental data on temperature distribution on the surfaces of corrugated metal sheets of the construction were accumulated and generalized and the analytical method for estimating their thermoelastic state was improved; the developed new means of restoration and the methods for assessing the bearing capacity of damaged transport constructions with CMS reinforced with stiffeners were developed; the inertial system of technical state monitoring of constructions with CMS is developed and realized; it is implemented in calculations, design and field tests of a number of objects: SPE “Triad” Ltd.: during field tests of the tunnel-type underpass with CMS; Dresden University of Technology (Germany): during assessing the degree of the ballast layer density of the track and the backfill; “Company” “Spetsproektbud “Ltd.: during the diagnosis of civil buildings with CMS; “Firm” “Interbud”Ltd.: during assessing the bearing capacity of CMS in the construction of the workshop in Zolochiv town; CO “Line102Yua”: during full-scale inertial tests of small bridges; JSC “Ukrzaliznytsia”: during the inspection and testing of constructions with CMS of the railway track.