Evaluation of the stabilizing thin-shell roof system state by means of dynamic characteristics
- Authors: Bakusov P.А.1,2
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Affiliations:
- OOO «ISP Georekonstruktsiya»
- Saint-Petersburg State University of Architecture and Civil Engineering
- Issue: No 1-2 (2025)
- Pages: 106-111
- Section: Articles
- URL: https://rjonco.com/0044-4472/article/view/677232
- DOI: https://doi.org/10.31659/0044-4472-2025-1-2-106-111
- ID: 677232
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Abstract
The paper presents the results of the stabilizing thin-shell roof system technical survey of the St. Petersburg Sports and Concert Complex. To assess the technical condition of the stabilizing system, the free-oscillation method was used and dynamic tests of half-truss cables were carried out. Based on the results, an assessment of the dynamic characteristics was carried out: the first and second natural-vibration frequencies were identified. As a result, the conclusion was made about the uniformity of the cable tension, and problem areas were identified through the comparison of the obtained characteristics.
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About the authors
P. А. Bakusov
OOO «ISP Georekonstruktsiya»; Saint-Petersburg State University of Architecture and Civil Engineering
Author for correspondence.
Email: bakusovpavel@gmail.com
Lead Engineer, Teacher-Researcher
Russian Federation, 4, Izmaylovsky prosp., Saint Petersburg, 190005; 4, 2nd Krasnoarmeyskaya Street, Saint Petersburg 190005References
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Supplementary files
Supplementary Files
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Fig. 1. Saint Petersburg Sports and Concert Complex, 1980–1982
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Fig. 2. Thin-shell roof installation, 1978
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Fig. 3. Layout of thin-shell roof and «petal» with thicknesses by zones
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Fig. 4. Structural elements of the thin-shell roof: a – units for fastening the thin-shell roof to the external supporting reinforced concrete ring; b – units of thin-shell roof attachment to the central steel load-bearing ring; c – connection of thin-shell roof «petals» through T-beam
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Fig. 5. Stabilizing cable plan and cross section along axis
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Fig. 6. Structural elements of semi-trusses: a – units for fastening cables to the column; b – units for attachment of cables to the intermediate stabilizing steel ring; c – general view of stabilizing system
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Fig. 7. Example of vibrometer installation on the semi-truss cable
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Fig. 8. Normalized spectral densities: a – unclamped cables; b – clamped cables
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Fig. 9. Histogram of the distribution of natural frequencies along the axes: blue columns - the first natural frequency, red - the second natural frequency
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Fig. 10. Results of geodetic survey: a – deviation of columns from vertical, mm; b – outer support ring levelling, mm; c – levelling of the central steel load-bearing ring, mm
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Fig. 11. Displacement of the unit along the cable (damage to the paint layer)
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Fig. 12. Example of embedded pipes through which elements of the stabilizing coating system were to pass
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Fig. 13. Examples of clamping of stabilizing system elements
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