Abstract
The isolation concept of vibrations produced by various dynamic actions on construction structures is not new, while there are multiple concerns worldwide for solutions development meant to solve the vibrational problems within the structures where different mechanical systems are mounted for vibration isolation and better stability acquisition. These systems are strategically positioned for avoiding the transmission of vibration energy from the foundation to the insulated superstructure. For bridge structures, base insulation systems can be used composed of elastomeric elements and sliding friction systems in order to obtain good stability both at dynamic loads resulting from traffic and also for the loads dictated by the seismic actions requesting the structure at a certain moment of time. An isolation system working on the principle of a rolling pendulum was made at a reduced scale and tested in laboratory conditions on a bridge beam, in order to highlight the specific values of acceleration that can be obtained at the level of the structural frames where mounted. For a bridge-type structure containing the support pier and superstructure, the insulating system is interposed between these structural frames in order to decouple and isolate the superstructure from the efforts coming from the foundation and the support pier when a dynamic action occurs. The rolling pendulum solution using a spherical pivot is proposed in this study in order to highlight the behavior of the superstructure during dynamic vibratory motions, and the obtained results are compared between the support pier and the isolated superstructure.
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Scheaua, F. (2022). Experimental Results from Testing a Rolling Pendulum Base Isolation System at Bridge Structures Subjected by Dynamic Shocks and Vibrations. In: Herisanu, N., Marinca, V. (eds) Acoustics and Vibration of Mechanical Structures – AVMS-2021. Springer Proceedings in Physics, vol 274. Springer, Cham. https://doi.org/10.1007/978-3-030-96787-1_38
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DOI: https://doi.org/10.1007/978-3-030-96787-1_38
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