Abstract
The fatigue fracture of the stud connector is the main failure mode of the steel–concrete composite structure. Fatigue assessment of cracked stud connectors with weld details is conducted in this study by using the linear elastic fracture mechanics approach. The mixed-mode stress intensity factor is calculated by the M-integral method, and the relative crack position hc is considered. First, a 3D finite element model of the push-out test with stud welding details is proposed in this study, and the load–slip curve and stress distribution of the stud connector were analyzed. Then, the mixed-mode stress intensity factor was calculated by defining the sub-model with cracks, and the influence coefficient of the mixed-mode stress intensity factor was investigated. The important influencing parameters, which include the crack aspect ratio, relative crack height, stud diameter, and stud height, are combined for calculation. The mixed-mode stress intensity factor of the stud is dominated by mode I (open). The influence of the stud height is not observed. However, the stress intensity factor of the crack tip gradually increases with the stud diameter. The study also found the influence of the crack shape under various conditions. The results of this study can be used by researchers to evaluate the fatigue fracture conditions of stud connectors.
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Acknowledgements
The research described in this paper was financially supported by the National Natural Science Foundation of China (Grant No. 51878072), and the Graduate Student Research Innovation Project of Hunan Province (CSUST) (Grant Nos. CX20200844, CX20190661).
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Wang, D., Tan, B., Wang, L. et al. Numerical Study on Stress Intensity Factors for Stud Connectors of Steel–Concrete Connection. Int J Steel Struct 21, 1775–1789 (2021). https://doi.org/10.1007/s13296-021-00534-6
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DOI: https://doi.org/10.1007/s13296-021-00534-6