RESULTS OF TECHNICAL INSPECTION OF A 120-METER-HIGH METEOROLOGICAL TRIANGULAR MAST
Keywords:
mast, inspection, technical condition category, section, supportAbstract
The article discusses the results of a technical inspection conducted on a 120-meter-high metal triangular mast to determine the causes of its failure. The mast is situated in an area with a seismicity rating of 7 on the seismicity scale, according to DBN V.1.1-12:2014 for Construction in Seismic Areas of Ukraine. The terrain is mountainous, and the site is located outside a settlement on Mount Plai, in an open area. The width in the axes of the belt elements varies with height. The mast is constructed from factory-made elements with heights of 2.4 meters, 2.0 meters, and 1.5 meters, using flange connections, and is anchored by guy wires at 10 different levels. The structural system is a vertically oriented continuous spatial metal truss. The cross-section of the mast forms an equilateral triangle. Vertical belt elements consist of steel pipes with diameters of 60 mm and 48 mm, while the lattice is made of solid metal rods with diameters of 20 mm, 18 mm, and 16 mm. The stays are steel cables with a diameter of 10 mm. The spatial rigidity of the structure is achieved through the combined action of the truss body and the stays.
During the technical inspection of the mast, a field survey methodology was employed to evaluate the load-bearing capacity of the structures.
The inspection included several steps: familiarization with and study of the technical documentation related to the inspection object; preliminary inspection to assess the general condition of the structure and identify sections with visible defects; detailed visual inspection of visible defects, including damage to individual elements, deformations, cracks in components and joints, and any destruction; instrumental inspection utilizing specialized equipment and non-destructive testing methods, along with devices for linear measurements. Throughout the inspection, all elements of the mast were thoroughly examined, and conclusions regarding its failure were drawn based on these observations.
References
Babyak I., Vikhot S. Testing and the Possibility of Using the A-IIIв Periodic Profile Reinforcement for Bridge Running Structures. Lecture Notes in Civil Engineering, 604 LNCE. 2024. Pp. 1–10. DOI: 10.1007/978-3-031-67576-8_1
Blikharskyy Y., Vashkevych R., Kopiika N., Bobalo T., Blikharskyy Z. Calculation residual strength of reinforced concrete beams with damages, which occurred during loading. IOP Conference Series: Materials Science and Engineering. 2021. № 1021 (1). DOI: 10.1088/1757-899X/1021/1/012012
Blikharskyy Z., Bobalo T., Kramarchuk A., Ilnytskyy B., Vashkevych R. Bearing capacity of stone beam reinforced by GFRP, Lecture Notes in Civil Engineering. Proceedings of 2nd International scientific conference on EcoComfort and Current issues of civil engineering EcoComfort, Lviv; Ukraine, 16–18 September 2020. Vol. 100. P. 42–52. https://doi.org/10.1007/978-3-030-57340-9_6
Blikharskyy Z., Shnal T., Khmil R. The influence of the damaged reinforcing bars on the stress-strain state of the rein-forced concrete beams. Production Engineering Archives. 2017. № 14. Pp. 23–26. DOI: 10.30657/pea.2017.14.06
Bobalo T., Blikharskyy Y., Selejdak J., Kopiika N., Blikharskyy Z. Concrete Beams Reinforced with High Strength Rebar in Combination with External Steel Tape. Applied Sciences (Switzerland). 2023. № 13 (7). DOI: 10.3390/app13074528
Burchenya S., Famulyak Y., Sobczak-Piastka J. Modelling of Work of Cut and Stretchy Sheet in Span Beam Structures with the Mixed Reinforcement. IOP Conference Series: Earth and Environmental Science. 2019. № 362 (1). DOI: 10.1088/1755-1315/362/1/012114
Burchenya S., Sobczak-Piastka J. The research of bearing capacity and stress-strain behavior of bending complex steel concrete beams. AIP Conference Proceedings, 2077. 2023. DOI: 10.1063/1.5091871
Burchenya S., Vikhot S., Surmai M., Mishchenko Y. The results of the technical inspection of the production building on Buika street, house 24 in the City of Lviv. AIP Conference Proceedings. 2023. № 2949 (1). https://doi.org/10.1063/5.0165906
DSTU N B V.1.2-18:2017 Guidelines for the inspection of buildings and structures to determine their value and technical condition. Kyiv: UkrNDNC, 2017. 47 p. [Effective from 01.04.2017].
Vybranets Y., Vikhot S. Spatial Calculation of Metal Truss Structure in Joint Work with Reinforced Concrete Slab. Lecture Notes in Civil Engineering, 290 LNCE. 2023. Pp. 450–458. DOI: 10.1007/978-3-031-14141-6_46
Vybranets Y., Vikhot S., Burchenya S. Field Tests and Analysis of Flat Monolithic Reinforced Concrete Slabs. Lecture Notes in Civil Engineering. 2024. № 438. Pp. 484–497. DOI: 10.1007/978-3-031-44955-0_49
Vybranets Y., Vikhot S., Burchenya S.: Design Recommendations for Flat Monolithic Reinforced Concrete Slabs. Lecture Notes in Civil Engineering, 604 LNCE. 2024. Pp. 602–610. DOI: 10.1007/978-3-031-67576-8_56
