Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of moving loads on railway bridges considering the structure of railway track
A significant increase of the high-speed railway network has been built in Spain and other European countries for the last decades. Due to the complex Spanish orography, several tunnels and bridges are necessary to accommodate the railway layout to the specific site conditions. Already from the first installation of high-speed viaducts, concerns regarding dynamic effects caused by train loads and eventual resonance called the attention of engineers and scientists. As a result, dynamic analyses are typically required at the design stage of railway bridges in order to verify the structural safety, serviceability and passenger comfort. Despite the experience gained for the last years, new challenges have arisen due to the introduction of technological innovations in railway construction. Among them, track types different from the traditional ballasted track are being introduced, including ballastless track systems or slab track. Ballastless track has been identified as a promising alternative against ballasted track due to the reduced maintenance costs and excellent quality control. Ballastless track has been recently installed in several railway bridges of the new high-speed lines in northern Spain (e.g. new access to Galicia). Due to its practical interest, the main goal of the present TFM is to analyze whether the track structure (i.e. ballasted or ballastless) can play a role in the dynamic performance of railway bridges and the passenger comfort. As the term ballastless track can include several track types which can affect differently to the whole structural response, the present TFM has covered the analysis of so-called monolithic and independent ballastless track systems, depending on the interaction degree of the track with the bridge girder. The former can be a design consisting of an in-site continuous reinforced concrete slab in which twin-block sleepers are embedded. The later can be implemented as floating precast concrete slabs separated from the bridge girder with an intermediate elastomeric layer ...
Effects of moving loads on railway bridges considering the structure of railway track
A significant increase of the high-speed railway network has been built in Spain and other European countries for the last decades. Due to the complex Spanish orography, several tunnels and bridges are necessary to accommodate the railway layout to the specific site conditions. Already from the first installation of high-speed viaducts, concerns regarding dynamic effects caused by train loads and eventual resonance called the attention of engineers and scientists. As a result, dynamic analyses are typically required at the design stage of railway bridges in order to verify the structural safety, serviceability and passenger comfort. Despite the experience gained for the last years, new challenges have arisen due to the introduction of technological innovations in railway construction. Among them, track types different from the traditional ballasted track are being introduced, including ballastless track systems or slab track. Ballastless track has been identified as a promising alternative against ballasted track due to the reduced maintenance costs and excellent quality control. Ballastless track has been recently installed in several railway bridges of the new high-speed lines in northern Spain (e.g. new access to Galicia). Due to its practical interest, the main goal of the present TFM is to analyze whether the track structure (i.e. ballasted or ballastless) can play a role in the dynamic performance of railway bridges and the passenger comfort. As the term ballastless track can include several track types which can affect differently to the whole structural response, the present TFM has covered the analysis of so-called monolithic and independent ballastless track systems, depending on the interaction degree of the track with the bridge girder. The former can be a design consisting of an in-site continuous reinforced concrete slab in which twin-block sleepers are embedded. The later can be implemented as floating precast concrete slabs separated from the bridge girder with an intermediate elastomeric layer ...
Effects of moving loads on railway bridges considering the structure of railway track
01.07.2022
Hochschulschrift
Elektronische Ressource
Englisch
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