Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Highlights The paper improves the bridge to increase the safety trains during earthquakes. Bridges with several continuous spans cannot improve the train safety obviously. Large gaps between simply supported girders will increase the derailment coefficient. Large pier stiffness can increase the safety of moving trains during earthquakes.
Abstract The main purpose of this study is to investigate the improvement of bridge structures to increase the safety of moving trains during earthquakes using finite element analyses, where nonlinear moving wheel elements are used to simulate the contact and separation modes of rails and wheels. The bridges are standard multi-span bridges for a high-speed rail system. The results of parametric studies with over 320 analyses indicate that the improvement in the train safety for multi-span bridges with several continuous spans is not observable. Large gaps between two simply supported girders during earthquakes will increase the train derailment coefficient, and thus a reduction in the eccentricity between two girders can enhance the safety of moving trains. Additionally, because the first train natural frequencies are often in the low frequency range, large pier stiffness producing high bridge natural frequencies can confine the train derailment coefficients near a normal value, even in the resonance between bridges and earthquakes, so we suggest that large pier stiffness should be used to ensure the safety of moving trains during earthquakes.
Highlights The paper improves the bridge to increase the safety trains during earthquakes. Bridges with several continuous spans cannot improve the train safety obviously. Large gaps between simply supported girders will increase the derailment coefficient. Large pier stiffness can increase the safety of moving trains during earthquakes.
Abstract The main purpose of this study is to investigate the improvement of bridge structures to increase the safety of moving trains during earthquakes using finite element analyses, where nonlinear moving wheel elements are used to simulate the contact and separation modes of rails and wheels. The bridges are standard multi-span bridges for a high-speed rail system. The results of parametric studies with over 320 analyses indicate that the improvement in the train safety for multi-span bridges with several continuous spans is not observable. Large gaps between two simply supported girders during earthquakes will increase the train derailment coefficient, and thus a reduction in the eccentricity between two girders can enhance the safety of moving trains. Additionally, because the first train natural frequencies are often in the low frequency range, large pier stiffness producing high bridge natural frequencies can confine the train derailment coefficients near a normal value, even in the resonance between bridges and earthquakes, so we suggest that large pier stiffness should be used to ensure the safety of moving trains during earthquakes.
Improvement of bridge structures to increase the safety of moving trains during earthquakes
Ju, S.H. (Autor:in)
Engineering Structures ; 56 ; 501-508
20.05.2013
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Improvement of bridge structures to increase the safety of moving trains during earthquakes
| Online Contents | 2013
Running Safety of Trains on Rigid Frame Bridge During Earthquakes
| British Library Conference Proceedings | 2006
Safety of Maglev Trains Moving on Bridges Subject to Foundation Settlements and Earthquakes
| British Library Online Contents | 2014