Development and verification of a new OpenSees element model for a two-stage friction pendulum bearing
Abstract Bridges play a critical role in transportation infrastructure, and ensuring their safety is a key concern for structural engineers. Various seismic isolation techniques have been introduced to mitigate the impact of earthquake forces. The unavailability of novel isolation elements in commer...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-02928-6 |
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| author | Hanzlah Akhlaq Tianbo Peng Boyang Yan Muhammad Salman Khan |
| author_facet | Hanzlah Akhlaq Tianbo Peng Boyang Yan Muhammad Salman Khan |
| author_sort | Hanzlah Akhlaq |
| collection | DOAJ |
| description | Abstract Bridges play a critical role in transportation infrastructure, and ensuring their safety is a key concern for structural engineers. Various seismic isolation techniques have been introduced to mitigate the impact of earthquake forces. The unavailability of novel isolation elements in commercial software makes it difficult to implement in real-world structures. This study presents the development and verification of a two-stage friction pendulum bearing (TSFPB) nonlinear element model within the OpenSees environment. The TSFPB comprises only two sliding stages, designed to accommodate different-intensity earthquakes, rendering it suitable for both moderate and severe earthquakes. A theoretical model of the TSFPB is first presented to illustrate its working mechanism. Based on this, a nonlinear element model for TSFPB is developed in C++ and integrated into the OpenSees framework. Additionally, a numerical model is developed in ABAQUS to assess the stability and stress condition before prototype development. Comprehensive laboratory tests are conducted to verify the accuracy of the OpenSees, theoretical and ABAQUS models. The results demonstrate the remarkable accuracy of these models with experimental results, maintaining the discrepancy below 10%. These findings confirm the accuracy of the TSFPB nonlinear element and highlight its potential for advanced seismic isolation design. |
| format | Article |
| id | doaj-art-500eb44a9d1d4eefad4ae8775f801cfa |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-500eb44a9d1d4eefad4ae8775f801cfa2025-08-20T04:01:34ZengNature PortfolioScientific Reports2045-23222025-07-0115111410.1038/s41598-025-02928-6Development and verification of a new OpenSees element model for a two-stage friction pendulum bearingHanzlah Akhlaq0Tianbo Peng1Boyang Yan2Muhammad Salman Khan3College of Civil Engineering, Tongji UniversityCollege of Civil Engineering, Tongji UniversityCollege of Civil Engineering, Tongji UniversityCollege of Civil Engineering, Tongji UniversityAbstract Bridges play a critical role in transportation infrastructure, and ensuring their safety is a key concern for structural engineers. Various seismic isolation techniques have been introduced to mitigate the impact of earthquake forces. The unavailability of novel isolation elements in commercial software makes it difficult to implement in real-world structures. This study presents the development and verification of a two-stage friction pendulum bearing (TSFPB) nonlinear element model within the OpenSees environment. The TSFPB comprises only two sliding stages, designed to accommodate different-intensity earthquakes, rendering it suitable for both moderate and severe earthquakes. A theoretical model of the TSFPB is first presented to illustrate its working mechanism. Based on this, a nonlinear element model for TSFPB is developed in C++ and integrated into the OpenSees framework. Additionally, a numerical model is developed in ABAQUS to assess the stability and stress condition before prototype development. Comprehensive laboratory tests are conducted to verify the accuracy of the OpenSees, theoretical and ABAQUS models. The results demonstrate the remarkable accuracy of these models with experimental results, maintaining the discrepancy below 10%. These findings confirm the accuracy of the TSFPB nonlinear element and highlight its potential for advanced seismic isolation design.https://doi.org/10.1038/s41598-025-02928-6Seismic isolationTwo-stage friction pendulum bearingOpenSees elementExperimental validationBridge seismic design |
| spellingShingle | Hanzlah Akhlaq Tianbo Peng Boyang Yan Muhammad Salman Khan Development and verification of a new OpenSees element model for a two-stage friction pendulum bearing Scientific Reports Seismic isolation Two-stage friction pendulum bearing OpenSees element Experimental validation Bridge seismic design |
| title | Development and verification of a new OpenSees element model for a two-stage friction pendulum bearing |
| title_full | Development and verification of a new OpenSees element model for a two-stage friction pendulum bearing |
| title_fullStr | Development and verification of a new OpenSees element model for a two-stage friction pendulum bearing |
| title_full_unstemmed | Development and verification of a new OpenSees element model for a two-stage friction pendulum bearing |
| title_short | Development and verification of a new OpenSees element model for a two-stage friction pendulum bearing |
| title_sort | development and verification of a new opensees element model for a two stage friction pendulum bearing |
| topic | Seismic isolation Two-stage friction pendulum bearing OpenSees element Experimental validation Bridge seismic design |
| url | https://doi.org/10.1038/s41598-025-02928-6 |
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