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Stability monitoring method of UHPC spherical hinge horizontal rotation system

Wang Jiawei, Cao Bing, Huang Bo

Archives of Civil Engineering

2022

Vol. 68, nr 3

601--616

As the spherical hinge in the bridge swivel structure bears huge vertical pressure, the material and its structural load-bearing capacity are therefore highly-required. In the latest research, the ultrahigh performance concrete material is applied to the spherical hinge structure and the author of this article has conducted a detailed study on the mechanical properties and failure mechanism of this structure; however, there is still no real bridge application at present. In order to ensure the stability of the structure, based on an actual project, this research proposes a monitoring method for the stability of the UHPC spherical hinge horizontal rotation system, i.e., using theoretical calculations and numerical analysis methods. Besides, the mechanical characteristics of the bridge during the process of rotation are predicted, and the monitoring data of the stress of the UHPC spherical hinge, the bending moment of the pier bottom, as well as the acceleration time history of the cantilever beam end are made a comparison to judge whether the rotating posture of the structure is stable. The results show that UHPC spherical hinge features high strength and will not cause axial damage; also, the horizontal rotation system will not cause the unstability due to wind-induced vibration and structural self-excited vibration. Briefly concluded, the theoretical model is basically consistent with the measured data, i.e., the mechanical properties of the structure can be accurately predicted.

Analiza i ocena wyznaczania parametru tłumienia drgań budowli na podstawie jej odpowiedzi na działanie wiatru

Kowalska A.

Zeszyty Naukowe. Budownictwo / Politechnika Śląska

2004

z. 102

209-216

Opisano najczęściej stosowane metody wyznaczania parametru tłumienia drgań budowli na podstawie wyników pomiarów drgań tych budowli wywołanych działaniem wiatru. Zaprezentowano główne założenia i algorytmy postępowania, dotyczące poszczególnych metod. Przedstawiono ocenę tych metod, biorąc pod uwagę możliwości ich zastosowania i jakość otrzymanych wyników.

Most frequently used methods of damping parameter determination from the wind-induced dynamic measurements of the structure have been presented and described in this paper. Main assumptions and algorithms of these methods have been also presented. The methods have been assessed taking into possibilities of their application and the quality of results.