原文传递
Simplified design for positive restraint continuity moment in bridge girders
| 题名： | Simplified design for positive restraint continuity moment in bridge girders |
| 其他题名： | 1.AASHTO(American Association of State Highway and Transportation Officials).2014.AASHTO LRFD Bridge Design Specifications.7th ed.,customary U.S.units.Washington,DC:AASHTO. |
| 正文语种： | 英文 |
| 作者： | Maher K. Tadros |
| 关键词： | Aging effect;bridge;continuity diaphragm;restraint moment;thermal contraction;thermal expansion |
| 摘要： | Precast, prestressed concrete continuous bridges have been constructed in many countries around the world. Although these bridges have been in service for many years, there has been limited verification of the ability of the connection to provide the predicted continuity. Subsequently, many U.S. states design the girders as simple spans for both dead and live loads without considering any moments developed by the diaphragm connection. The effect of thermal expansion and contraction is hardly considered in the analysis, though it is found to have significant effects on continuity. Apart from this, there is no consensus on the best method to calculate restraint moments that develop in the continuity diaphragm or how to detail positive moment connections. The objective of this paper is to provide a simplified spreadsheet analysis for the restraint moments and the required crack control reinforcement. Detailed numerical analysis was performed using a two-span NU-girder bridge. It is recommended that the strands already in the beam be used to meet the crack control requirements with no additional mild reinforcement. |
| 出版年： | 2018 |
| 论文唯一标识： | J-30Y2018V63N04033 |
| 英文栏目名称： | Slabs, Panels, and Hollow-core |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 拼音刊名(出版物代码)： | J-30 |
| 卷： | 63 |
| 期： | 04 |
| 页码： | 62-78 |
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