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Supervised by Ministry of Industry and Information Technology of The People's Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:Lin Ye,Wenping Cai,Yangfan Zhuang,Yang Du,Qiu Zhao.Shear Behavior of Open Steel Tube Connectors in Steel-UHPC Composite Decks[J].Journal of Harbin Institute Of Technology(New Series),2021,28(5):78-88.DOI:10.11916/j.issn.1005-9113.19114.
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Shear Behavior of Open Steel Tube Connectors in Steel-UHPC Composite Decks
Author NameAffiliation
Lin Ye School of Civil Engineering, Fuzhou University, Fuzhou 350108, China
School of Civil Engineering, Yango University, Fuzhou 350015, China 
Wenping Cai Hunan Communication Research Institute Co.LTD., Changsha 410000, China 
Yangfan Zhuang School of Civil Engineering, Fuzhou University, Fuzhou 350108, China 
Yang Du School of Civil Engineering, Fuzhou University, Fuzhou 350108, China 
Qiu Zhao School of Civil Engineering, Fuzhou University, Fuzhou 350108, China 
Abstract:
Steel and ultra-high performance concrete (UHPC) composite decks are effective at reducing fatigue cracking and asphalt pavement damage. The shear behavior of innovative open steel tube (OST) connectors in steel-UHPC composite decks was investigated by conducting push-out tests. The test parameter is the presence of reinforcement in the deck. The load-slip curves and shear behavior of the push-out specimens were obtained and discussed. The test results indicate that as compared with plain concrete specimens, the limit slip of reinforced specimens decreased by 32% and the shear stiffness increased by 10%, but the ultimate shear capacity was almost the same. The use of UHPC influenced the failure process as it was observed that the OST connector was sheared off at its lower semi-tube, followed by the pull-out failure of the upper semi-tube. A finite element model was verified by tests and was then used to analyze the deformation and failure behaviors of the composite deck with open tubes. The model demonstrates that there is a stress concentration zone at the connector root, and the lower semi-tube is the main component that is subject to loads.
Key words:  composite deck  open tube connectors  UHPC  push-out test  shear behaviors  finite element model
DOI:10.11916/j.issn.1005-9113.19114
Clc Number:TU318;U442
Fund:
Descriptions in Chinese:
  

钢-UHPC组合桥面板开口连接件抗剪性能研究

叶琳1,2,蔡文平3,庄扬帆1,杜阳1,赵秋1

(1.福州大学 土木工程学院,福州350108;

2. 阳光学院 土木工程学院,福州350015;

3. 湖南省交通科学研究所有限公司,长沙410000)

中文说明:

钢和超高性能混凝土(UHPC)组合桥面板可有效减少疲劳裂纹和沥青路面损伤。通过推出试验研究了钢-UHPC组合桥面板新型开口钢环(OST)连接件的抗剪性能。测试参数是桥面板有无配筋。 实验讨论了推出试件的荷载-滑动曲线和抗剪性能。结果表明,与素混凝土试件相比,配筋试件的极限滑移率降低了32%,抗剪刚度提高了10%,但极限抗剪承载力几乎相同。UHPC的使用影响了失效过程,观察到OST连接件在其下半部被剪断,随后是上半部的拔出失效。通过试验验证了有限元模型的正确性,并利用该模型分析了带开口钢环连接件桥面板的变形和失效行为。该模型表明,连接件根部存在应力集中区,开口钢环下半部是承受载荷的主要部位。

关键词:组合桥面板,开口钢管连接件,UHPC,推出试验,抗剪性能,有限元模型

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