Abstract
In current practice and design, composite twin I-girder bridges are predominantly used in highway bridges design due to their low cost comparing to other types of bridges. While classified as non-redundant structural system according to AASHTO specifications, previous practical experiences have shown that this type of bridges is capable of surviving some accident events such as losing of one support or sudden fracture of web and bottom flange. For this reason, an experiment was carried out to investigate the redundancy level of composite twin I-girder system. The fracture is limited to the whole web and bottom flange as the top flange is fully connected with the slab by shear connectors. Results show that after the fracture of full web and bottom flange, the composite twin I-girder bridge is still capable of carrying some load before losing its functionality and reaches the ultimate failure state. Base on the results of this study, the redundancy level of tested specimens is higher than 1.0. There for, the simply supported composite twin I-girder model in this study is concluded as a redundant bridge structure.
| Original language | English |
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| Title of host publication | STEEL AND ALUMINIUM STRUCTURES |
| Editors | B Young, Y Cai |
| Publisher | University of Hong Kong |
| Number of pages | 8 |
| Publication status | Published - 2016 |
| MoE publication type | A4 Article in a conference publication |
| Event | International Conference on Steel and Aluminium Structures - Hong Kong, China Duration: 7 Dec 2016 → 9 Dec 2016 Conference number: 8 http://www.civil.hku.hk/ICSAS2016/ |
Conference
| Conference | International Conference on Steel and Aluminium Structures |
|---|---|
| Abbreviated title | ICSAS |
| Country/Territory | China |
| City | Hong Kong |
| Period | 07/12/2016 → 09/12/2016 |
| Internet address |
Keywords
- composite twin I-girder Bridge
- redundancy
- experimental study
- fracture critical member