Introduction. To date, reinforced concrete precast-monolithic spans have gained considerable popularity during the construction of new and reconstruction of existing bridges and overpasses in Ukraine. This is especially noticeable in the last 10-15 years, when improved materials and new effective structural solutions began to be used during the construction of bridges.
To achieve greater efficiency of such constructions, improve their technical and economic indicators, it is important to have more information about their operation, stress-strain state. These data can be obtained during the inspection of constructions, their load testing and comparison with analytical studies.
Purpose. Research of the stress-strain state of reinforced concrete precast-monolithic spans of the structure: analysis of deflections, analysis of spatial work of the structure under the action of static loading.
Materials and Methods. When writing the article, materials from tests of precast-monolithic spans of the structure across the Irpin River at km 21+140 of the public highway of state importance R-30 Approach to the city of Irpin in the Kyiv region were used.
The following research methods were used: information analysis, mathematical modeling, methods of full-scale and theoretical research.
Results. As a result of the conducted research, experimental and analytical values of deflections of elements of spans of the structure were established, their comparison was performed and constructive coefficients were determined. Experimental and theoretical coefficients of transverse load distribution of spans were determined and the nature of spatial work of the structure was established.
Conclusion. The results of analytical and experimental studies of the structures of precast-monolithic bridge spans have shown their good spatial rigidity, uniform distribution of loads on the beams in the transverse direction of the structure. The experimentally and analytically measured deflection values do not exceed the maximum permissible values. When loading the spans with static loads, no deviations in their operation were detected.
According to the test results, the structure can be used for traffic and meets the requirements of current load standards according to schemes A-15, NK 100.
