Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Past earthquakes have demonstrated the vulnerability of deck bridges, which are the most common type in elevated roads. Especially over-loading of piers and drop-off of sections are a continuing concern. Seismic Control concepts, when correctly understood and applied, can provide the necessary physical force limits and reduced displacements even under loading beyond the design limit. The concept of choice here is the Hysteretic Device System since deck bridges usually provide a natural seismic link between piers and deck. To study the performance and robustness of this concept, shaking table tests were performed at IZIIS, Skopje during the NATO-SfP project ISUbridge on a model deck bridge using controllable friction devices UHYDE-fbr to simulate the behavior of different passive devices including device failure. The tests showed that a stiff-ductile device in the link not only protects the piers from over-load, but also provides superior performance compared to viscous or soft base-isolation devices. Failure of such a device further reduced the demand on the piers but did not lead to excessive deck displacements or damage, thus confirming considerable seismic robustness for the HDS concept. This corroborates observations on the Bolu viaduct during the Kocaeli event. Unfortunately, HDS is often confused with Base- Isolation, which leads to the application of BI-devices, like LRBs and thus a reduction in performance and robustness. This is even more true for viscous devices, which are favored today.
Past earthquakes have demonstrated the vulnerability of deck bridges, which are the most common type in elevated roads. Especially over-loading of piers and drop-off of sections are a continuing concern. Seismic Control concepts, when correctly understood and applied, can provide the necessary physical force limits and reduced displacements even under loading beyond the design limit. The concept of choice here is the Hysteretic Device System since deck bridges usually provide a natural seismic link between piers and deck. To study the performance and robustness of this concept, shaking table tests were performed at IZIIS, Skopje during the NATO-SfP project ISUbridge on a model deck bridge using controllable friction devices UHYDE-fbr to simulate the behavior of different passive devices including device failure. The tests showed that a stiff-ductile device in the link not only protects the piers from over-load, but also provides superior performance compared to viscous or soft base-isolation devices. Failure of such a device further reduced the demand on the piers but did not lead to excessive deck displacements or damage, thus confirming considerable seismic robustness for the HDS concept. This corroborates observations on the Bolu viaduct during the Kocaeli event. Unfortunately, HDS is often confused with Base- Isolation, which leads to the application of BI-devices, like LRBs and thus a reduction in performance and robustness. This is even more true for viscous devices, which are favored today.
Seismic control for elevated roads
Dorka Uwe E. (Autor:in)
2014
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Metadata by DOAJ is licensed under CC BY-SA 1.0
Elegant design for elevated roads
Engineering Index Backfile | 1966
Design of elevated roads in Germany
| Engineering Index Backfile | 1961
Prestressed concrete elevated roads in Britain
| Engineering Index Backfile | 1968
Elevated steel roads for inner-city traffic
| Engineering Index Backfile | 1962
Design and Planning of Environmentally Compatible Elevated Roads
| British Library Conference Proceedings | 2000