| Issue |
MATEC Web Conf.
Volume 165, 2018
12th International Fatigue Congress (FATIGUE 2018)
|
|
|---|---|---|
| Article Number | 16011 | |
| Number of page(s) | 4 | |
| Section | Multi-Axial, Variable and Complex Loadings | |
| DOI | https://doi.org/10.1051/matecconf/201816516011 | |
| Published online | 25 May 2018 | |
Mechanical and thermo-mechanical response of a lead-core bearing device subjected to different loading conditions
1
Technical University of Sofia, 8 Kliment Ohridski blvd, Sofia 1000, Bulgaria
2
University of Iceland, Earthquake Engineering Research Centre Austurvegur 2a, 800 Selfoss, Iceland
* Corresponding author: todor.zhelyazov@tu-sofia.bg
The contribution is focused on the numerical modelling, simulation and analysis of a lead-core bearing device for passive seismic isolation. An accurate finite element model of a lead-core bearing device is presented. The model is designed to analyse both mechanical and thermo-mechanical responses of the seismic isolator to different loading conditions. Specifically, the mechanical behaviour in a typical identification test is simulated. The response of the lead-core bearing device to circular sinusoidal paths is analysed. The obtained shear displacement – shear force relationship is compared to experimental data found in literature sources. The hypothesis that heating of the lead-core during cyclic loading affects the degrading phenomena in the bearing device is taken into account. Constitutive laws are defined for each material: lead, rubber and steel. Both predefined constitutive laws (in the used general–purpose finite element code) and semi-analytical procedures aimed at a more accurate modelling of the constitutive relations are tested. The results obtained by finite element analysis are to be further used to calibrate a macroscopic model of the lead-core bearing device seen as a single-degree-of-freedom mechanical system.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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