The paper presents selected methods of determining stability and limit load of a truss top chord in opened bridges. These methods include linear buckling and non-linear static analysis based on the finite element method and algorithms based on design code procedures. The described methods were tested on an example of a steel footbridge situated in Straszyn. The results of stability analysis are compared. The results of geometrical and material non-linear analysis are close for the perfect structure, but very large (40%) for large imperfection amplitudes. Using first global free vibration mode as in initial imperfection resulted in greater load-carrying capacity than first global buckling mode. The critical forces is nearly equal to the results from non-linear analysis. A Polish standard procedure showed some difficulties during analysis so the final condition of stability was not satisfied, while a Eurocode procedure confirmed correctness of a footbridge design.
Autorzy
Informacje dodatkowe
- DOI
- Cyfrowy identyfikator dokumentu elektronicznego link otwiera się w nowej karcie 10.1201/b20057-135
- Kategoria
- Aktywność konferencyjna
- Typ
- materiały konferencyjne indeksowane w Web of Science
- Język
- angielski
- Rok wydania
- 2016
