原文传递
Improving Infrastructure Sustainability 2: Repairing Existing Fatigue Cracks in Steel Bridges Using Carbon Fiber Reinforced Polymer Materials.
| 题名： | Improving Infrastructure Sustainability 2: Repairing Existing Fatigue Cracks in Steel Bridges Using Carbon Fiber Reinforced Polymer Materials. |
| 作者： | Bun, S. H.; Bonet, E.; Matamoros, A.; Bennett, C.; Barrett-Gonzalez, R.; Li, J.; Rolfe, S. |
| 关键词： | Steel bridges, Carbon fiber reinforced polymer, Fatigue cracks, Distortion-induced fatigue |
| 摘要： | Distortion-induced fatigue affects a large number of bridges within the US highway system. This type of damage is commonly observed at connections between cross frames and steel girders. The differential displacement induced by bridge traffic induces forces in the cross frames that cause out-of-plane distortion of the web, inducing highly localized stresses at the welds that tie the connection plate used to attach the cross frame to the girder. This report describes the results of an experimental program to evaluate the use of composite materials to prevent and repair distortion-induced fatigue damage in web-gap regions of steel girders. In this method of repair, a composite block is cast in place in the area surrounding the cross frame-to-girder connection to provide an alternate load path and reduce the stress demands in the welds of the connection. Two full-depth bridge girders were subjected to dynamic loading under a constant force range and allowed to develop fatigue cracks. The girders were subsequently repaired using composite blocks and subjected to several million fatigue cycles. Test results showed that the repair method was effective in halting the propagation of fatigue cracks in the bridge girders, and that it was particularly effective when anchor bolts were attached to the girder flange. |
| 总页数： | Bun, S. H.; Bonet, E.; Matamoros, A.; Bennett, C.; Barrett-Gonzalez, R.; Li, J.; Rolfe, S. |
| 报告类型： | 科技报告 |
相关文献
- Improving Infrastructure Sustainability 2: Repairing Existing Fatigue Cracks in Steel Bridges Using Carbon Fiber Reinforced Polymer Materials, Technical Summary.
- The Cost of Automotive Polymer Composites: A Review and Assessment of DOE's Lightweight Materials Composites Research
- Design of Structures, 2006. Transportation Research Record. Journal of the Transportation Research Board, No. 1976.
- Low Cost Thermolplastic Wrap to Enhance Bridge Safety.
- Design of Structures, 2004. Transportation research record.
- FATIGUE EVALUATION OF STEEL AND CONCRETE BRIDGES.
检索历史
应用推荐
