Shear Performance of Short Channel Connectors in a Steel-UHPC Composite Deck
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The steel-ultra high performance concrete (UHPC) composite deck has been increasingly concerned for the fatigue damage ameliorations on the steel bridge deck and the pavement. The UHPC plate in the composite deck featured by the favorable tensile performance and small thickness helps achieving a light self-weight. However, it results to a limited short space for the shear connector to transfer the interlayer shear force. Therefore, this study proposed a kind of short steel channel-section connector for the composite deck with a thin UHPC plate, and investigated its mechanical behavior through push-out tests and parametric FEM analysis. The test results showed the deformation of the channel connector during the loading process generally included the elastic, elastic–plastic, and plastic stages, and the shear fracture of channel connector dominated in the failure mode. The shear stiffness of the specimen with embedded reinforcement was increased by 39%, but had little influence on the shear capacity. On the other side, the parametric analysis told that the shear strength of connector increased significantly as the connector height increased from 50 to 80 mm. Nevertheless, the connector arrangement direction was a sensitive factor to the uplift resistance of the connector.
KeywordsComposite deck Channel connectors UHPC Push-out test Shear behaviors FEM analysis
This research was funded by the National Natural Science Foundation of China (No. 51478120). And we appreciate the supports from Shanghai Pujiang Project (No. 18PJ1410300) and Tongji Civil Engineering Peak Discipline Plan.
- American Institute of Steel Construction (AISC). (2005). ANSI/AISC 360–05. Specification for structural steel buildings, Chicago.Google Scholar
- Canadian Standard Association (CSA). (2001). CAN/CSA-S16–01, Limit states design of steel structures, Toronto.Google Scholar
- EN 1994 Eurocode 4. (2005). Design of Composite Concrete and Steel Structures. Belgium: European Committee for Standardization.Google Scholar
- Li, L., Zheng, W. Z., & Lu, S. S. (2010). Experimental study on mechanical properties of reactive powder concrete. Journal of Harbin Institute of Technology, 17(6), 795–800.Google Scholar
- National standards of People's Republic of China. (2003). GB 50017–2003, Code for Design of Steel Structure.. Beijing: China Planning Press,Google Scholar
- Wang J. Y., Guo J. Y., & Jia L. J., et al. (2017). Push-out tests of demountable headed stud shear connectors in steel-UHPC composite structures. Composite Structures, 170.Google Scholar
- Xiao L., Li X., & Ma Z. J. (2016). Behavior of perforated shear connectors in steel–concrete composite joints of hybrid bridges. Journal of Bridge Engineering. Google Scholar