Superelastic Shape Memory Alloy Honeycomb Damper
The relative displacements between the girders and piers of isolated bridges during intense earthquakes are usually so large that traditional restrainers cannot accommodate the resulting deformation. A novel superelastic shape memory alloy (SMA) honeycomb damper (SHD) is proposed as a means to combi...
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| Format: | Article |
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MDPI AG
2023-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/24/13154 |
| _version_ | 1797382207665340416 |
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| author | Sasa Cao Fulong Hu Guixin Zhang |
| author_facet | Sasa Cao Fulong Hu Guixin Zhang |
| author_sort | Sasa Cao |
| collection | DOAJ |
| description | The relative displacements between the girders and piers of isolated bridges during intense earthquakes are usually so large that traditional restrainers cannot accommodate the resulting deformation. A novel superelastic shape memory alloy (SMA) honeycomb damper (SHD) is proposed as a means to combine the large strain capacity of SMA and the geometrical nonlinear deformation of honeycomb structures. As a result, the large deformation capacity of the novel damper satisfies the requirements for bridge restrainers. The proposed device consists of a superelastic shape memory alloy (SMA) honeycomb structure, which enables a self-centering capability, along with steel plates that serve to prevent the buckling of the SMA honeycomb. An examination of the SHD was undertaken initially from theoretical perspectives. A multi-cell SHD specimen was subsequently manufactured and evaluated. Following this, numerical simulation analyses of the SHDs using a three-dimensional high-fidelity finite element model were employed to examine the experimental results. In the end, a technique for improving the SHD was suggested. The results indicate that the SHD is able to demonstrate superior self-centering capabilities and stable hysteretic responses when subjected to earthquakes. |
| first_indexed | 2024-03-08T21:02:06Z |
| format | Article |
| id | doaj.art-e96e4c87ff0944b588ef00904d1e767d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-08T21:02:06Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-e96e4c87ff0944b588ef00904d1e767d2023-12-22T13:51:39ZengMDPI AGApplied Sciences2076-34172023-12-0113241315410.3390/app132413154Superelastic Shape Memory Alloy Honeycomb DamperSasa Cao0Fulong Hu1Guixin Zhang2Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150010, ChinaDepartment of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaKey Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150010, ChinaThe relative displacements between the girders and piers of isolated bridges during intense earthquakes are usually so large that traditional restrainers cannot accommodate the resulting deformation. A novel superelastic shape memory alloy (SMA) honeycomb damper (SHD) is proposed as a means to combine the large strain capacity of SMA and the geometrical nonlinear deformation of honeycomb structures. As a result, the large deformation capacity of the novel damper satisfies the requirements for bridge restrainers. The proposed device consists of a superelastic shape memory alloy (SMA) honeycomb structure, which enables a self-centering capability, along with steel plates that serve to prevent the buckling of the SMA honeycomb. An examination of the SHD was undertaken initially from theoretical perspectives. A multi-cell SHD specimen was subsequently manufactured and evaluated. Following this, numerical simulation analyses of the SHDs using a three-dimensional high-fidelity finite element model were employed to examine the experimental results. In the end, a technique for improving the SHD was suggested. The results indicate that the SHD is able to demonstrate superior self-centering capabilities and stable hysteretic responses when subjected to earthquakes.https://www.mdpi.com/2076-3417/13/24/13154superelastic SMAhoneycomb dampergeometric nonlinearitylong-strokethickness of walls |
| spellingShingle | Sasa Cao Fulong Hu Guixin Zhang Superelastic Shape Memory Alloy Honeycomb Damper Applied Sciences superelastic SMA honeycomb damper geometric nonlinearity long-stroke thickness of walls |
| title | Superelastic Shape Memory Alloy Honeycomb Damper |
| title_full | Superelastic Shape Memory Alloy Honeycomb Damper |
| title_fullStr | Superelastic Shape Memory Alloy Honeycomb Damper |
| title_full_unstemmed | Superelastic Shape Memory Alloy Honeycomb Damper |
| title_short | Superelastic Shape Memory Alloy Honeycomb Damper |
| title_sort | superelastic shape memory alloy honeycomb damper |
| topic | superelastic SMA honeycomb damper geometric nonlinearity long-stroke thickness of walls |
| url | https://www.mdpi.com/2076-3417/13/24/13154 |
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