Development of Knowledge in the Application of Strut-and-Tie Modeling
| 项目名称： | Development of Knowledge in the Application of Strut-and-Tie Modeling |
| 摘要： | The research team will fill knowledge gaps in the 2017 AASHTO LRFD Bridge Design Specifications including but not limited to (1) strength of nodes in which tension fields in three orthogonal direction are present, (2) stress concentrations observed at curved bar nodes (locations where the reinforcing bars change direction) can be critical. The tighter the radius of the bend, the higher these stresses are. Development of design recommendations for this special class of CTT nodes has not yet occurred in the U.S., due to lack of supporting test data. (3) Triaxial confinement benefits offered by confining reinforcement have not been researched and codified. (4) AASHTO LRFD Bridge Design Specifications limit the spacing of crack control reinforcing to d/4 or 12 in, i.e., “d/4 limit”. This limit can be relaxed, if supported by experimental evidence. |
| 状态： | Active |
| 资金： | 999908 |
| 资助组织： | Texas Department of Transportation<==>Federal Highway Administration |
| 项目负责人： | Dassi, Martin |
| 执行机构： | Center for Transportation Research |
| 开始时间： | 20191216 |
| 预计完成日期： | 20221231 |
| 主题领域： | Bridges and other structures |
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- Research for AASHTO Standing Committee on Highways. Task 217. Verification and Implementation of Strut-and-Tie Model in LRFD Bridge Design Specifications
- Investigate the Strength of Struts Crossing Cold Joints
- SPR-4233: Implementing the Strut-and-Tie Method for the Design of Bridge Components
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