REDUNDANCY EVALUATION OF SIMPLY SUPPORTED COMPOSITE TWIN I-GIRDER BRIDGE

Heang Lam*, Weiwei Lin, Teruhiko Yoda

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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 languageEnglish
Title of host publicationSTEEL AND ALUMINIUM STRUCTURES
EditorsB Young, Y Cai
Number of pages8
Publication statusPublished - 2016
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Steel and Aluminium Structures - Hong Kong, China
Duration: 7 Dec 20169 Dec 2016
Conference number: 8
http://www.civil.hku.hk/ICSAS2016/

Conference

ConferenceInternational Conference on Steel and Aluminium Structures
Abbreviated titleICSAS
CountryChina
CityHong Kong
Period07/12/201609/12/2016
Internet address

Keywords

  • composite twin I-girder Bridge
  • redundancy
  • experimental study
  • fracture critical member

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