Hysteretic live load effect in soil-steel structure

• Autorzy: Sobótka M. , Machelski C.
• Języki publikacji: EN

Abstrakty

EN

This paper deals with the mechanical behaviour of soil-steel structures subjected to live loads. The results of the full scale experiment show that the deformation of such structures is affected not only by the location and intensity of the load, but also by the direction of its movement. The first part of the work reports the study of a railway viaduct located in Świdnica, Poland. In this study, the ST43-type locomotive is crossing the bridge one way and then back again. During such a loading cycle the deformation of the shell is registered. The graph of displacement in function of load position forms explicit hysteresis loop. Taking the advantage of the observation made in this experiment, a suitable 2D model of the structure is formulated and the test is simulated numerically. It is demonstrated that even quite a simple numerical model can give reliable results. Finally, it is proved that the hysteretic live load effect is associated with non-linear behaviour of the soil backfill as well as the shell-backfill contact zone.

Słowa kluczowe

EN

flexible bridge; corrugated steel; viaduct; full scale testing; numerical simulation

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2016
• Tom: Vol. 64, iss. 4
• Strony: 493--499
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Sobótka M.

• Faculty of Civil Engineering Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

autor

Machelski C.

• Faculty of Civil Engineering Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

Bibliografia

• 1. Machelski C., Antoniszyn G., Influence of live loads on the soil-steel bridges, Studia Geotechnica et Mechanica, 26(3–4): 91–119, 2004.
• 2. Machelski C., Michalski B., Deformations of soil-steel bridges, Roads and Bridges, 4(2): 91–110, 2005.
• 3. Machelski C., Dependence of deformation of soil-shell structure on the direction of load passage, Roads and Bridges, 13(3): 223–233, 2014.
• 4. Machelski C., Marcinowski J., Numerical modelling of moving load effect in a soilsteel bridge, Archives of Institute of Civil Engineering, Poznan University of Technology 1: 155–165. 2007.
• 5. Sobótka M., Numerical simulation of hysteretic live load effect in a soil-steel bridge, Studia Geotechnica et Mechanica, 36(1): 104–110. 2014.
• 6. FLAC, User’s manual, Itasca Consulting Group Inc., Minneapolis, 2007.
• 7. Fredlund D.G., Morgenstern N.R., Widger R.A., The shear strength of unsaturated soils, Canadian Geotechnical Journal, 15(3): 313–321, 1978, doi: 10.1139/t78-029.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).