Utilization of 300 ksi Strands for TxDOT Prestressed Girders
| 项目名称： | Utilization of 300 ksi Strands for TxDOT Prestressed Girders |
| 摘要： | Advances in material and fabrication processes have allowed the prestressing-strand industry to increase the strength of strands from 270 ksi to 300 ksi. Several state DOTs around the nation are already considering incorporating higher strength strands into their designs. The impetus is to obtain longer bridge span lengths for a given section depth. The main goal of this research project is to update the designs of standard Texas DOT prestress girders to incorporate 300 ksi 0.6 inch diameter strands. The main concern for upgrading to 300 ksi strands revolves around the increased spalling and bursting stresses associated with higher prestressing forces. Such increases in stresses can cause increased cracking in girders at prestress transfer. The research team will conduct tests on full-scale prestressed girders for all standard TX girder section sizes. These tests will allow the research team to hone in on optimal detailing for girders using 300 ksi strands. As a result, new designs for all TX girder sections shall be produced for 300 ksi strands. Updates to design specifications shall also be proposed to reflect research findings. The expected benefits are more economical bridges that can span longer distances for a given section depth. |
| 状态： | Active |
| 资金： | 849245 |
| 资助组织： | Texas Department of Transportation |
| 管理组织： | Texas Department of Transportation |
| 项目负责人： | Schwerdt, Tom |
| 执行机构： | University of Texas at San Antonio |
| 主要研究人员： | Ghannoum, Wassim M |
| 开始时间： | 20220919 |
| 预计完成日期： | 20250831 |
| 主题领域： | Bridges and other structures；Design；Highways；Materials |
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