Fatigue life assessment of large scale T-jointed steel truss bridge components
| Autor: | Shunyao Cai, Colin Anthony Taylor, Mehdi M Kashani, Paul J Vardanega, Weizhen Chen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
Scale (ratio) Welded joints 020101 civil engineering 02 engineering and technology Welding 0201 civil engineering law.invention Stress (mechanics) 0203 mechanical engineering law Fatigue Parametric statistics Cope holes Civil and Structural Engineering business.industry Numerical analysis Metals and Alloys Structural engineering Building and Construction Fatigue limit Finite element method 020303 mechanical engineering & transports Truss bridge Notch Stress Mechanics of Materials business Steel bridges |
| Zdroj: | Cai, S, Chen, W, Kashani, M, Vardanega, P & Taylor, C 2017, ' Fatigue life assessment of large scale T-jointed steel truss bridge components ', Journal of Constructional Steel Research, vol. 133, pp. 499-509 . https://doi.org/10.1016/j.jcsr.2017.01.008 |
| ISSN: | 0143-974X |
| DOI: | 10.1016/j.jcsr.2017.01.008 |
| Popis: | Among current approaches for fatigue strength assessment, the effective notch stress method is widely employed by practising engineers designing welded joints. This is particularly important in the situation where the nominal stress and structural stress cannot be easily quantified. In this paper, the applicability of the so called effective notch stress approach on large-size T-joints in truss bridges is investigated through a comprehensive experimental programme supported by numerical analysis. A series of large-scale fatigue tests on prototype large-size T-joints with cope holes were conducted. These types of joints are normally used in fully welded truss bridges. Furthermore, a simple parametric study was conducted using finite element analysis to investigate the effect of plate thickness and cope-hole radius on effective notch stress. Comparison of the results with commonly used design guidance documents reveals that the effective notch stress approach provides a conservative estimate of the fatigue strength of the specimens tested in this experimental programme. |
| Databáze: | OpenAIRE |
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