Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridges
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 vehicles and to ensure that the bridge load remains below the allowed m...
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| Format: | Article |
| Language: | English |
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Riga Technical University Press
2018-03-01
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| Series: | The Baltic Journal of Road and Bridge Engineering |
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| Online Access: | https://bjrbe-journals.rtu.lv/article/view/2592 |
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| author | Omar Mohammed Arturo Gonzalez Daniel Cantero |
| author_facet | Omar Mohammed Arturo Gonzalez Daniel Cantero |
| author_sort | Omar Mohammed |
| collection | DOAJ |
| description | 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 vehicles and to ensure that the bridge load remains below the allowed maximum. Given that the speed of these large vehicles 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. |
| format | Article |
| id | doaj-art-95b3fed390e54e44aa1a2e8f9ff2f68e |
| institution | Kabale University |
| issn | 1822-427X 1822-4288 |
| language | English |
| publishDate | 2018-03-01 |
| publisher | Riga Technical University Press |
| record_format | Article |
| series | The Baltic Journal of Road and Bridge Engineering |
| spelling | doaj-art-95b3fed390e54e44aa1a2e8f9ff2f68e2025-01-02T10:06:07ZengRiga Technical University PressThe Baltic Journal of Road and Bridge Engineering1822-427X1822-42882018-03-0113111310.3846/bjrbe.2018.3821324Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridgesOmar Mohammed0Arturo Gonzalez1Daniel Cantero2School of Civil Engineering, University College Dublin, Belfield, Dublin 4, IrelandSchool of Civil Engineering, University College Dublin, Belfield, Dublin 4, IrelandNorwegian University of Science and Technology, Richard Birkelands vei, 1A, Trondheim 7491, NorwayExtremely 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 vehicles and to ensure that the bridge load remains below the allowed maximum. Given that the speed of these large vehicles 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.https://bjrbe-journals.rtu.lv/article/view/2592bridge dynamicscritical velocitydynamic amplification factor (daf)expansion jointlarge truckspermit vehiclesvehicle bridge interaction (vbi). |
| spellingShingle | Omar Mohammed Arturo Gonzalez Daniel Cantero Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridges The Baltic Journal of Road and Bridge Engineering bridge dynamics critical velocity dynamic amplification factor (daf) expansion joint large trucks permit vehicles vehicle bridge interaction (vbi). |
| title | Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridges |
| title_full | Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridges |
| title_fullStr | Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridges |
| title_full_unstemmed | Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridges |
| title_short | Dynamic impact of heavy long vehicle with equally spaced axles on short-span highway bridges |
| title_sort | dynamic impact of heavy long vehicle with equally spaced axles on short span highway bridges |
| topic | bridge dynamics critical velocity dynamic amplification factor (daf) expansion joint large trucks permit vehicles vehicle bridge interaction (vbi). |
| url | https://bjrbe-journals.rtu.lv/article/view/2592 |
| work_keys_str_mv | AT omarmohammed dynamicimpactofheavylongvehiclewithequallyspacedaxlesonshortspanhighwaybridges AT arturogonzalez dynamicimpactofheavylongvehiclewithequallyspacedaxlesonshortspanhighwaybridges AT danielcantero dynamicimpactofheavylongvehiclewithequallyspacedaxlesonshortspanhighwaybridges |