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Title |
Evaluation of the Dynamic Impact Factor of Heavy Permit Vehicles Using Long-term Monitoring Data from a Concrete Hollow-Slab Bridge
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Authors |
이정휘(Jungwhee Lee) ; 백인열(Inyeol Paik) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.6.819 |
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Keywords |
충격계수; 고중량 차량; 콘크리트 중공 슬래브 교량; 저주파 통과 필터; 교량 진동 impact factor; heavy vehicle; concrete hollow-slab bridge; low-pass filter; bridge vibration |
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Abstract |
This paper presents a study to determine the impact factor applicable to the safety assessment of bridges subjected to heavy-vehicle loading. A measurement system was installed on a concrete hollow-slab bridge, and data obtained through loading tests and long-term monitoring were analyzed for a heavy low-bed trailer and a mobile-crane vehicle. Static displacements were determined by applying a low-pass filter to the dynamic displacement data from the loading tests and by referring to the low-speed loading results. The impact factors were then calculated and analyzed using dynamic displacement data for heavy vehicles extracted from the long-term monitoring records. For the slab bridge and heavy vehicles studied, the resulting impact factors were below the value defined in the current bridge code. The low-bed trailer exhibited a higher impact factor than the mobile crane due to the long distance between its middle axles and the amplified vibration generated at the rear axles.
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