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Strengthening of Route 378 Bridge Over Wynantskill Creek in New York Using FRP Laminages; Special rept
| 题名： | Strengthening of Route 378 Bridge Over Wynantskill Creek in New York Using FRP Laminages; Special rept |
| 作者： | Hag-Elsafi, O.; Kunin, J.; Alampalli, S.; Conway, T. |
| 关键词： | Bridges; Strengthening; Composite laminates; Design; Installation; Reinforcement concrete; Moisture; Salt; Load tests; Structural behavior |
| 摘要： | This report describes application of Fiber-Reinforced Polymer (FRP) composite laminates to strengthen an aging reinforced-concrete T-beam bridge in South Troy, Rensselaer County, New York. Leakage at the end joints of this single-span structure led to substantial moisture and salt infiltration in the bridge superstructure. Presence of efflorescence was observed, and freeze-thaw cracking and concrete delamination at some locations on the beams were noted. Concerns about integrity of the steel reinforcing and overall safety of the bridge were raised. These concerns were heightened by the absence of any documents pertaining to the bridge design, such as rebar size, steel type, concrete strength, and design loads. Thus, a decision was made to strengthen the bridge using bonded FRP-laminates. Load tests were conducted before and after the laminates were installed to evaluate effectiveness of the strengthening system, and investigate its influence on structural behavior of the bridge. Results from these tests and those obtained using classical analysis are compared in the report. |
| 总页数： | 64p |
| 报告类型： | 科技报告 |
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