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Fracture Critical Steel Twin Tub Girder Bridges, Project Summary.
| 题名： | Fracture Critical Steel Twin Tub Girder Bridges, Project Summary. |
| 作者： | Hurlebaus, S.; Mander, J. B.; Terzioglu, T.; Boger, N. C.; Fatima, A. |
| 关键词： | Finite element analysis, Steel twin tub girder (STTG), Structural elements(Construction), Twin tub girder, Fracture critical, Parametric study, Long-spanned bridges, Maintenance (upkeep), Fatigue (Materials), Texas Department of Transportation (TxDOT) |
| 摘要： | Steel twin tub girder (STTG) bridges are a popular choice for dealing with long-spanned bridges in Texas, especially when tight-radii curves are necessary. Such solutions are aesthetically pleasing. However, these bridges are deemed fracture critical; with this comes a high price of biennial inspection. Since the structural members are prone to fatigue and fracture failures, the nonredundant structural elements of fracture critical bridges make these susceptible to sudden total or partial collapse that is initiated by the failure of a single member. The massive damage to life and property that is incurred due to such failures dictate the Texas Department of Transportation (TxDOT) allocate huge funds for fabrication, maintenance, and close hands-on inspections. The primary motivation behind this research is to investigate whether the fracture critical designation may be removed for certain bridges in this twin tub class. The consideration of load path redundancy alone may be misleading in classifying non-fracture critical members as fracture critical members (FCMs), causing unnecessary expenditure. |
| 报告类型： | 科技报告 |
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