Comprehensive Evaluation of Design Standards, Materials, and Construction for Slip Formed Concrete Bridge Railings to Alleviate Sources of Early Age Deterioration
| 项目名称： | Comprehensive Evaluation of Design Standards, Materials, and Construction for Slip Formed Concrete Bridge Railings to Alleviate Sources of Early Age Deterioration |
| 摘要： | The Ohio Department of Transportation (ODOT) is continually looking for ways to alleviate sources of early age deterioration in slip formed concrete bridge railings, thus extending service life and reducing maintenance costs. Horizontal cracking, delaminations and spalling due to poor consolidation around the longitudinal reinforcement is a major problem ODOT is experiencing. This problem likely results from multiple sources. One suspected source is movement of the concrete reinforcement during slipforming operations. As the slipform machine progresses, the cage deforms in the direction of movement and rebounds slightly after placement. Because the concrete is low slump, when the cage rebounds, a void may be created. In January 2020, ODOT introduced stiffening reinforcement to standard drawing SBR-1-20 in order to increase cage rigidity during slipforming operations. The actual effectiveness of this change can only be determined by data driven facts that need to be collected and analyzed. The goal of this research is to enhance design standards, construction specifications and material specifications that promote the slip forming of concrete bridge railings that are free of defects for extended service life. |
| 状态： | Active |
| 资金： | 723253 |
| 资助组织： | Federal Highway Administration |
| 管理组织： | Ohio Department of Transportation |
| 项目负责人： | Martindale, Jill |
| 执行机构： | Ohio State University, Columbus |
| 主要研究人员： | Burris, Lisa E |
| 开始时间： | 20220930 |
| 预计完成日期： | 20270930 |
| 主题领域： | Bridges and other structures；Construction；Design；Highways |
相关文献
- Low-Cement Concrete Mixture for Bridge Decks and Rails
- Internal Curing of Bridge Decks and Concrete Pavement to Reduce Cracking
- Design and Numerical Evaluation of GFRP Reinforcement for Concrete Bridge Railing
- Application of Internal Curing to Improve Concrete Bridge Deck Performance
- Impact Test of GFRP Reinforced Concrete Bridge Barriers
- Stainless Steel Strands for Prestressed Concrete Bridge Elements
检索历史
应用推荐
