Failure mode analysis of lead rubber bearings and CFST column series isolation system

DOI

10.2991/978-94-6463-429-7_34How to use a DOI?

Keywords

Series isolation system; CFST column; Pushover analysis; failure mode; parameter analysis

Abstract

At present, with the rapid development and application of seismic isolation technology, compared with reinforced concrete columns, concrete-filled steel tube columns have superior mechanical properties such as high strength, light weight, good ductility, excellent bending performance, fatigue resistance and impact resistance. At present, the failure modes of series isolation components (SIS) composed of lead core rubber bearing (LRB) and steel tube concrete (CFST) columns are not studied. In order to have a deeper understanding of the failure mode of the series isolation components, 42 groups of refined SIS finite element models with h/b, n and α parameters were established using ABAQUS finite element software based on the 500mm diameter bearing model. By using Pushover analysis method, the relationship curve between force and displacement of series isolation system is studied, the damage process and failure mode of series isolation system are discussed, and the influence of three parameters on the failure mode is analyzed. The results show that the relationship between force and displacement of the new series isolation system is trilinear. The axial compression ratio mainly affects the bearing capacity of the steel pipe, and the higher the axial compression ratio, the smaller the bearing capacity. The aspect ratio and steel content mainly affect the stiffness and bearing capacity of the steel pipe. When the aspect ratio is less than or equal to 4.2 and the steel content is greater than or equal to 6.4%, the bearing capacity and stiffness are the best. The failure mode mainly includes the failure of connecting plate, the failure of bolt, the failure of concrete filled steel tube column and the failure of steel tube. The failure of concrete filled steel tube column is the main failure mode, and the standard design of concrete filled steel tube column should be strengthened.

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  - Zhongtie Wu
AU  - Cheng Zhao
PY  - 2024
DA  - 2024/06/07
TI  - Failure mode analysis of lead rubber bearings and CFST column series isolation system
BT  - Proceedings of the 2024 7th International Conference on Structural Engineering and Industrial Architecture (ICSEIA 2024)
PB  - Atlantis Press
SP  - 325
EP  - 336
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-429-7_34
DO  - 10.2991/978-94-6463-429-7_34
ID  - Wu2024
ER  -