Influence of different arrangements of isolation bearings on seismic isolation effect

DOI

10.2991/978-94-6463-429-7_31How to use a DOI?

Keywords

seismic isolation support; arrangement style; seismic isolation design; seismic isolation factor; dynamic time-history analysis

Abstract

In the design of structural isolation, the displacement of the isolation structure of a single isolation support is easy to exceed the maximum deformation limit under the action of an earthquake, so the design often adopts the combination design of lead-core rubber bearing and linear natural rubber bearing. The layout of seismic isolation supports and the proportion of the two isolation supports will affect the final seismic isolation effectiveness of structures, in order to explore this influence. four groups of isolation schemes were designed. The structural isolation was achieved by varying the ratios and arrangements of these two types of rubber isolators. The SAUSAGE finite element software was employed for dynamic time-history analysis of the structures. The results indicate that the use of seismic isolation bearings significantly extends the natural vibration period of the structure, reducing its response under seismic loading. Under seismic fortification, the horizontal seismic impact coefficient is 0.39, and the seismic effect is reduced by 1 degree. Under rarely occurred earthquake, the maximum tensile stress and displacement of the seismic isolation bearings meet the relevant specifications. After isolation, the inter-story displacement angle and inter-story shear of the structure decrease substantially. When designing structures for seismic isolation, to enhance the isolation effectiveness, lead-core rubber bearings should be prioritized in the outer ring and at the four corners, while linear natural rubber bearings can be used in the inner ring.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Xingbin Jing
AU  - Junwu Dai
PY  - 2024
DA  - 2024/06/07
TI  - Influence of different arrangements of isolation bearings on seismic isolation effect
BT  - Proceedings of the 2024 7th International Conference on Structural Engineering and Industrial Architecture (ICSEIA 2024)
PB  - Atlantis Press
SP  - 287
EP  - 298
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-429-7_31
DO  - 10.2991/978-94-6463-429-7_31
ID  - Jing2024
ER  -