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Stress Redistribution of Headed Stud Connectors Subjected to Constant Shear Force

  • Rong LiuEmail author
  • Zhiqiang Feng
  • Hengda Ye
  • Yuqing Liu
Article
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Abstract

In order to evaluate the stress concentration of stud shear connectors considering creep effect of concrete, finite element analysis of the push-out specimen is carried out. The rate of creep method is used in the solid model to reflect the creep property of concrete. Local bearing stress and splitting stress of concrete are analyzed. The stress concentration of steel beam and stud near the weld toe are obtained. Results show that owing to the creep effect of concrete, the local stresses of the stud are redistributed, even under constant shear force. The stress concentration factor (SCF) of concrete bearing stress in front of the weld collar decreases by about 52%, while the bending deformation of the stud increases due to the stress redistribution given 10 years of creep time. SCF at the weld toe of steel beam increases about 1.5 times of short-term, and SCF of stud shank increases about 3 times. The stress concentration at the root of studs become more obvious under constant shear force due to concrete creep, which is adverse for the long-term behavior of studs in the normal service stage.

Keywords

Headed stud connectors Creep The rate of creep method Stress concentration Finite element analysis 

Notes

Acknowledgements

The research reported herein has been carried out as part of the research project granted by the National Natural Science Foundation of China (51978245). This paper is also partly supported by the Fundamental Research Funds for National Universities (2019B13314). The assistances are gratefully acknowledged.

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Copyright information

© Korean Society of Steel Construction 2019

Authors and Affiliations

  1. 1.College of Civil and Transportation EngineeringHohai UniversityNanjingChina
  2. 2.Department of Bridge EngineeringTongji UniversityShanghaiChina

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