Dynamic impact of heavy long vehicles with equally spaced axles on short-span highway bridges
| Autor: | Daniel Cantero, Omar Hazem Mohammed, Arturo González |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Truck
lcsh:TE1-450 Computer science bridge dynamics 020101 civil engineering 02 engineering and technology Expansion joint Permit vehicles Span (engineering) Bridge (nautical) 0201 civil engineering Vehicle bridge interaction (VBI) lcsh:TG1-470 lcsh:Bridge engineering 0203 mechanical engineering dynamic amplification factor (daf) vehicle bridge interaction (vbi) Critical velocity lcsh:Highway engineering. Roads and pavements Dynamic amplification factor (DAF) permit vehicles Civil and Structural Engineering Large trucks expansion joint business.industry Allowance (engineering) Building and Construction Structural engineering Critical ionization velocity Vibration Axle 020303 mechanical engineering & transports large trucks Bridge dynamics critical velocity dynamic amplification factor (DAF) vehicle bridge interaction (VBI) business |
| Zdroj: | The Baltic Journal of Road and Bridge Engineering; Vol 13, No 1 (2018): The Baltic Journal of Road and Bridge Engineering; 1-13 Baltic Journal of Road and Bridge Engineering; Vol 13 No 1 (2018); 1-13 The Baltic Journal of Road and Bridge Engineering, Vol 13, Iss 1, Pp 1-13 (2018) Baltic Journal of Road and Bridge Engineering |
| ISSN: | 1822-4288 1822-427X |
| Popis: | Extremely large trucks with a weight exceeding the standard require a permit before they are allowed to cross the bridges of a specific route. For the purpose of safety, an escort is often employed to maintain a distance between ve-hicles and to ensure that the bridge load remains below the allowed maximum. Given that the speed of these large vehi-cles is quite slow and that the amplitude of vibrations normally declines when the vehicle mass is large, a minor dynamic amplification of the bridge response is expected. However, some of these large trucks have a unique feature characterized by “multiple equally-spaced axles”, something that is uncommon in normal vehicle. The application of axle forces at equal intervals dynamically excite bridges to a considerable extent, even at low speeds. These “critical” low speeds are estimated a priori from the axle spacing of the truck and the main frequency of vibration of the bridge. This paper demonstrates that when the “critical” speed is unavoidable, a relatively high dynamic allowance must be added to static calculations before granting a permit to a long heavy vehicle. Copyright © 2018 The Author(s). Published by VGTU PressThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unre-stricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Databáze: | OpenAIRE |
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