Авторы:
Дата издания
01.01.2026На каком языке издана
ISSN
2041-9031Область исследования
Тип исследования
Аннотация (краткое описание)
This study presents a field-based assessment of the operational safety of a reinforced concrete overpass in Astana, Kazakhstan, using combined static and dynamic load testing. The structure is a three-span overpass with 41.0 m reinforced concrete main spans formed by prefabricated UBS 187.14 blocks with variable cross-sections. Static tests were conducted using six ballast-loaded trucks with an average weight of 21.0 t, while dynamic tests were performed under moving vehicle loads at speeds ranging from 3.5 to 70 km/h. The measured maximum static deflection at midspan was 23.5 mm, which is substantially lower than the regulatory limit of 102.5 mm for the 41 m span. Dynamic measurements showed stable structural behavior, with principal frequencies of 3.37–3.39 Hz in the main vibration modes and damping ratios of 3.5%–3.8%, exceeding the minimum reference value of 1.5% for reinforced concrete structures. The recorded vibration periods were outside the code-defined critical ranges, indicating no resonance-related operational concern.DOI
10.18280/ijsse.160119Тип публикаций
Практическое значение
The elevated damping capacity is attributed to the variable cross-section of the girders, which increases bending stiffness and internal energy dissipation near the supports. Overall, the combined test results indicate that the overpass remains in satisfactory technical condition and can continue safe operation, although periodic monitoring is recommended in view of increasing traffic intensity and vehicle loads.Квартиль
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