Techno Press
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Structural Engineering and Mechanics   Volume 62, Number 2, April25 2017, pages 179-196
DOI: http://dx.doi.org/10.12989/sem.2017.62.2.179
 
Dynamic response of steel-concrete composite bridges loaded by high-speed train
Monika Podworna

 
Abstract     [Full Text]
    The paper focuses on dynamic analyses of a series of simply-supported symmetric composite steel-concrete bridges loaded by an ICE-3 train moving at high speeds up to 300 km/h. The series includes five bridges with span lengths ranging from 15 m to 27 m, with repeatable geometry of the superstructures. The objects, designed according to Polish standards valid from 1980s to 2010, are modelled on the bridges serviced on the Central Main Line in Poland since 1980s. The advanced, twodimensional, physically nonlinear model of the bridge-track structure-high-speed train system takes into account unilateral nonlinear wheel-rail contact according to Hertz\'s theory and random vertical track irregularities equal for both rails. The analyses are focused on the influence of random track irregularities on dynamic response of composite steel-concrete bridges loaded by an ICE-3 train. It has been pointed out that certain restrictions on the train speed and on vertical track irregularities should be imposed.
 
Key Words
    random vertical track irregularities; composite steel-concrete bridge; ICE-3 train; unilateral nonlinear wheelrail contact; dynamic analysis; Monte-Carlo method
 
Address
Monika Podworna: Faculty of Civil Engineering, Wroclaw University of Technology, 27 Wyspianskiego Street, Wroclaw, PL 50370, Poland
 

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