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Study of Fiber Reinforced Plastics for Seismic Bridge Restrainers.
| 题名： | Study of Fiber Reinforced Plastics for Seismic Bridge Restrainers. |
| 作者： | JOHNSON, R.; MARAGAKIS, M.; SAIIDI, M. |
| 关键词： | *Fiber-reinforced-plastics; *Bridges-Structures.;Tensile-tests; Loads-Forces; Dynamic-tests; Steels-; Design-; Shake-tables; Stress-strain-relations. |
| 摘要： | Easily installed and inspected fiber reinforced plastic (FRP) as an alternative to steel for restrainer construction to reduce bridge hinge movements during earthquakes was examined. Glass, carbon, and hybrid (glass/carbon) restrainers were constructed and dynamically tested in the large-scale structures laboratory. Work included: (1) Tensile tests on FRP strips and on FRP/concrete bond versus loading rate; (2) FRP restrainer development, including dynamic testing; (3) Shake table data analysis and comparisons of FRP, steel, and SMA Restrainer performance; (4) Development of a FRP restrainer design method. Findings confirm FRP restrainer potential for future implementation to structures. Results include: (1) FRP strength is strain-rate insensitive; (2) FRP/concrete bond strength is a function of concrete shear strength and is strain rate sensitive; (3) Flexible restrainer construction and restrainer/concrete bond methods are demonstrated; (4) A simplified FRP restrainer design method, more realistic than AASHTO, and that considers bridge structure dynamic characteristics, is proposed. |
| 报告类型： | 科技报告 |
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