Compressive Stress Analysis for Loading Directionality on Partially Bonded Square Shaped Scrap Tire Rubber Pad Base Isolator

DOI

10.2991/978-94-6463-884-4_36How to use a DOI?

Keywords

STRP isolator; Base isolation; Lateral movement

Abstract

The compressive stress behavior of partially bonded scrap tire rubber pad (PB-STRP) base isolators under loading directionality in-service conditions is the main topic of this paper. By separating the superstructure from the substructure, base isolators reduce seismic impacts. Since the base materials for STRP isolators are created from recycled scrap car tires, they are considered an affordable and environmentally beneficial seismic isolation solution for low-to-medium-rise buildings. The purpose of these partially bonded base isolators in this study is to offer the benefits of both un-bonded and fully bonded isolators. Bonded isolators can prevent slippage failure. In contrast, un-bonded isolators have superior lateral movement with unique roll over deformation characteristics, but they may be more susceptible to slippage failure. By hybridizing the bonded condition known as Partially Bonded, this study aims to circumvent these limitations by maintaining lateral movement while controlling stress generation. Thus, this work uses finite element analysis (FEA) with the MSC Marc-Mentat software to study the compressive stress condition for different loading directionality of the square shaped PB-STRP isolator. A static vertical pressure of 5.0 MPa and different angle of loading at lateral direction then different levels of lateral displacements up to 250 percent shear strain are used to investigate a STRP isolator with varying amounts of bonded area with structural components. To find the maximum permitted bonded surface, the stress conditions (S₁₁, S₂₂ and S₃₃) at the upper and mid-height surfaces of the STRP isolator were assessed for various bonding area percentages with different angle of lateral loading. Initially all un-bonded, partially bonded and fully bonded STRP have shown almost same compressive stress for mid layer. But the variation has shown after 100% displacement and so on.

Copyright

© 2025 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  - Md. Mistak Hossain
AU  - Md. Basir Zisan
PY  - 2025
DA  - 2025/11/18
TI  - Compressive Stress Analysis for Loading Directionality on Partially Bonded Square Shaped Scrap Tire Rubber Pad Base Isolator
BT  - Proceedings of the 8th International Conference on Engineering Research, Innovation, and Education 2025 (ICERIE 2025)
PB  - Atlantis Press
SP  - 300
EP  - 307
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-884-4_36
DO  - 10.2991/978-94-6463-884-4_36
ID  - Hossain2025
ER  -