Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation Systems
In areas of civil engineering, the resilient friction base isolator (R-FBI) system has been used due to its enhanced isolation performance under seismic excitations. However, because nonlinear behavior of the R-FBI should be reflected in seismic design, effective stiffness (K<sub>eff</sub&g...
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MDPI AG
2020-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/11/3942 |
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| author | Heungbae Gil Kyoungbong Han Junho Gong Dooyong Cho |
| author_facet | Heungbae Gil Kyoungbong Han Junho Gong Dooyong Cho |
| author_sort | Heungbae Gil |
| collection | DOAJ |
| description | In areas of civil engineering, the resilient friction base isolator (R-FBI) system has been used due to its enhanced isolation performance under seismic excitations. However, because nonlinear behavior of the R-FBI should be reflected in seismic design, effective stiffness (K<sub>eff</sub>) of the R-FBI is uniformly applied at both peak ground acceleration (PGA) of 0.08 g and 0.154 g which use a multimodal response spectrum (RS) method analysis. For rational seismic design of bridges, it should be required to evaluate the dynamics of the R-FBI from in-field tests and to improve the seismic design procedure based on the performance level of the bridges. The objective of this study is to evaluate the dynamics of the R-FBI and to suggest the performance-based seismic design method for cable-supported bridges with the R-FBI. From the comparison between the experiments’ results and modal shape analyses, the modal shape analyses using primary (K<sub>u</sub>) or infinite stiffness (fixed end) showed a great agreement with the experimental results compared to the application of K<sub>eff</sub> in the shape analysis. Additionally, the RS or nonlinear time history method analyses by the PGA levels should be applied by reflecting the dynamic characteristics of the R-FBI for the reasonable and efficient seismic design. |
| first_indexed | 2024-03-10T19:20:20Z |
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| id | doaj.art-dfd88da40d924889a8edf5c673fd8fb4 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T19:20:20Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-dfd88da40d924889a8edf5c673fd8fb42023-11-20T03:02:05ZengMDPI AGApplied Sciences2076-34172020-06-011011394210.3390/app10113942Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation SystemsHeungbae Gil0Kyoungbong Han1Junho Gong2Dooyong Cho3Super Long Span Bridge R&D Centre, Expressway and Transportation Research Institute, Hwaseong 18489, KoreaSuper Long Span Bridge R&D Centre, Expressway and Transportation Research Institute, Hwaseong 18489, KoreaDepartment of Convergence System Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Convergence System Engineering, Chungnam National University, Daejeon 34134, KoreaIn areas of civil engineering, the resilient friction base isolator (R-FBI) system has been used due to its enhanced isolation performance under seismic excitations. However, because nonlinear behavior of the R-FBI should be reflected in seismic design, effective stiffness (K<sub>eff</sub>) of the R-FBI is uniformly applied at both peak ground acceleration (PGA) of 0.08 g and 0.154 g which use a multimodal response spectrum (RS) method analysis. For rational seismic design of bridges, it should be required to evaluate the dynamics of the R-FBI from in-field tests and to improve the seismic design procedure based on the performance level of the bridges. The objective of this study is to evaluate the dynamics of the R-FBI and to suggest the performance-based seismic design method for cable-supported bridges with the R-FBI. From the comparison between the experiments’ results and modal shape analyses, the modal shape analyses using primary (K<sub>u</sub>) or infinite stiffness (fixed end) showed a great agreement with the experimental results compared to the application of K<sub>eff</sub> in the shape analysis. Additionally, the RS or nonlinear time history method analyses by the PGA levels should be applied by reflecting the dynamic characteristics of the R-FBI for the reasonable and efficient seismic design.https://www.mdpi.com/2076-3417/10/11/3942performance-based seismic designcable-supported bridgeresilient friction base isolation systemsmultimodal response spectrum methodnonlinear time history method |
| spellingShingle | Heungbae Gil Kyoungbong Han Junho Gong Dooyong Cho Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation Systems Applied Sciences performance-based seismic design cable-supported bridge resilient friction base isolation systems multimodal response spectrum method nonlinear time history method |
| title | Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation Systems |
| title_full | Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation Systems |
| title_fullStr | Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation Systems |
| title_full_unstemmed | Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation Systems |
| title_short | Improvement of the Performance-Based Seismic Design Method of Cable Supported Bridges with the Resilient-Friction Base Isolation Systems |
| title_sort | improvement of the performance based seismic design method of cable supported bridges with the resilient friction base isolation systems |
| topic | performance-based seismic design cable-supported bridge resilient friction base isolation systems multimodal response spectrum method nonlinear time history method |
| url | https://www.mdpi.com/2076-3417/10/11/3942 |
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