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• W604482189 abstract "Shear studs are the most common connector used in steel-concrete composite bridges and, similar to other construction details, the fatigue limit state should be verified. In this project, a literature review on the fatigue strength of this detail is made and shows that the current Eurocode 4 detail categories under shear (FAT 90 with a slope m = 8) and under direct stresses (FAT 80 with a slope m = 3) can be used. The interaction between shear and direct stresses, which does not exist in SIA codes, can be accounted for using the Eurocode formula, which needs more validation. The detrimental influence of variable amplitude loading may lead to update the Miner rule limit, limiting it to 0.1 instead of unity. In order to evaluate the current codes verifications, two types of comparisons are made. Firstly, the damage equivalence factor values from the cades are compared with the re-sults from traffic simulations on different bridges (different influence lines) made using the program (WinQSIM) and the software developed during the research project AGB-2007/004). It is found that SIA 263: 2003 specifications for fatigue verification of shear studs are over-conservative since the SN curves for studs and the -factors given in the code are based on the SN-curves related to details subjected to direct stresses. For the Eurocode, the -factor for studs under shear is found to be generally sound. Also, the fa-tigue equivalent length, , proposed in the AGB-2007/004 project is found to be applica-ble to influence lines related to shear. Secondly, to apply the verifications, a typical steel-concrete girder bridge is selected for this study, the Venoge bridge on the highway A1. It is found again that the Eurocode 4 provides a more promising approach then the SIA code since -factors are specifically determined for the shear studs under shear. An-other reason is that the design fatigue strength for studs under shear are significantly dif-ferent, the Eurocode value is 90 MPa while the SIA code equals 69 MPa only. However, since the design truck weight is kN in the Eurocode, it is very high compared to the Swiss traffic and may result in an over-conservative fatigue design of the shear studs. Little information about practical cases of fatigue failure or damage being available, rele-vant information of damages in shear stud connections were gathered through an inquiry and literature. The conclusion is even if computations indicate it to be a critical detail in fatigue, the very few fatigue damage cases reported seem to indicate that shear connec-tors are not that susceptible to fatigue. A main reason is the determination of stresses in this detail which is very poor because models do not account for many effects (bond or friction, effects of slip, group effect, etc.). The conclusions are given in 3 languages in chapter 6." @default.
• W604482189 created "2016-06-24" @default.
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• W604482189 date "2014-07-01" @default.
• W604482189 modified "2023-09-24" @default.
• W604482189 title "Fatigue limit state of shear studs in steel-concrete composite road bridges" @default.
• W604482189 hasPublicationYear "2014" @default.
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