Cross-Frame Analysis and Design Improvements
| 项目名称： | Cross-Frame Analysis and Design Improvements |
| 摘要： | Developments in bridge design and analysis in recent years have created the need for improvements to cross-frame analysis and design for steel girder bridges. In the past, the configuration of cross-frame systems were generally based upon standard designs in which member sizes and layouts were dependent upon geometry and minimum member cross section requirements. The opportunities for improvements to cross-frame analysis and design cover a variety of topics. This project will address a number of these topics in a single, comprehensive research program that should result in a dramatic improvement in reliability and economy of cross-frames for steel I-girder bridges. The topics addressed should include (1) improved definition of fatigue loading for cross-frames in curved and/or severely skewed steel girder bridges analyzed using refined analysis methods; (2) implementation of stability bracing strength and stiffness requirements in the context of American Association of State Highway and Transportation Officials (AASHTO) load and resistance factor bridge design; (3) additional guidance for adjustment of the effective stiffness of cross-frame members in refined analysis models to reflect the influence of end connections on cross-frame member stiffness; and (4) streamlined design procedures for tee (WT) members in truss-type cross-frames and other strut applications The objective of this research is to provide (1) comprehensive, quantitatively based, guidance on the calculation of the design forces in cross-frames in steel girder bridges, (2) the calculation of stiffness requirements for stability, and (3) the influence of cross-frame member geometry upon the cross-frame stiffness. |
| 状态： | Proposed |
| 资金： | 750000 |
| 资助组织： | Federal Highway Administration |
| 项目负责人： | Dekelbab, Waseem |
| 开始时间： | 20160511 |
| 预计完成日期： | 0 |
| 实际结束时间： | 0 |
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