Development of Low-Cost Multifunctional Materials for Near-Surface-Mounted (NSM) Strengthening of RC Bridge Beams and Columns
| 项目名称： | Development of Low-Cost Multifunctional Materials for Near-Surface-Mounted (NSM) Strengthening of RC Bridge Beams and Columns |
| 摘要： | Due to their excellent passive re-centering and energy absorbing capabilities, superelastic shape memory alloys (SMAs) have been considered in the development of seismic protection systems. Among various SMA compositions, nickel-titanium (NiTi) alloys have been the most widely studied and commercially available material. Low-cost SMAs such as Cu-based or Fe-based SMAs have recently emerged as strong candidates to replace NiTi SMAs especially in the civil applications, primarily due to the need of larger scales and associated costs, and secondarily but equally importantly, their superior mechanical and shape memory properties, easy machinability and weldability. Specific Fe-based SMA compositions in particular, show intriguingly wide temperature ranges where superelasticity can be observed. These Fe-based SMA compositions also exhibits magnetic properties enabling the monitoring of stresses and strains on structural systems remotely using commercial magnetometers. Within this study, low-cost superelastic Fe-based and Cu-based SMA rods will be fabricated. Initial efforts will be towards the scale-up process of the rods, to enable their use as rebars in structural applications. These efforts will include specific thermomechanical processing and heat treatments to induce a unique microstructure that will result in the superelastic effect. The fabricated SMA bars will subsequently be used in the nearsurface-mounted (NSM) reinforcement of prototype reinforced concrete (RC) structural elements to investigate their effectiveness compared to other common reinforcement materials such as fiber-reinforced polymers. RC structures NSM strengthened via low-cost SMA will transform the design, construction, and rehabilitation of infrastructure systems. |
| 状态： | Active |
| 资金： | 120000 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 项目负责人： | Melson, Christopher |
| 执行机构： | Texas A&M University, College Station |
| 开始时间： | 20190815 |
| 预计完成日期： | 20210215 |
| 主题领域： | Bridges and other structures；Design；Materials |
相关文献
- Use of Fiber-Reinforced Polymer Composites for Bridge Repairs in Montana
- Innovative Strengthening for Deteriorated Concrete Bridges Using Embedded Composite Sheets Bonded with Polyester-silica
- Fatigue Life Analysis of Reinforced Concrete Beams Strengthened with Composites
- Development of Titanium Seismic Retrofits for Deficient Concrete Columns
- Super-Elastic Copper-Based and Iron-Based Shape Memory Alloys and Engineered Cementitious Composites for Extreme Events Resiliency
- Advanced Low-Cost Aircraft Structures
检索历史
应用推荐
