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首页> 外文期刊>Structural engineering international >Dynamic Loading Of Curved Steel Box Girder Bridges Due To Moving Vehicles
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Dynamic Loading Of Curved Steel Box Girder Bridges Due To Moving Vehicles

机译：车辆行驶引起的弯钢箱梁桥的动态荷载

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摘要

This paper presents a simplified method for determining the dynamic loading of curved steel box girder bridges due to vehicles moving across rough bridge decks. The curved single box girder bridges are divided into a number of thin-walled beam elements. The curved multi-box girder bridges are modeled as a curved grillage system. The analytical vehicle, simulated as a non-linear vehicle model with 11 degrees of freedom, is the HL-93 truck as described in the American Association of State Highway and Transportation Officials (AASHTO) specifications. Truck parameters include the body, suspensions, and tires. The bridge deck surface is simulated using a stochastic process (power spectral density function). The dynamic loading of 28 three-span continuous single box girder bridges and 216 three-span continuous multi-box girder bridges, with span lengths ranging from 22,83-30,48-22,86 m to 64,01-85,34-60,01 m is analyzed. The analytical results show that the torsion impact factors for curved box girder bridges can be relatively high, while moment, shear, and deflection impact factors are normally less than those of corresponding straight box girder bridges due to restricted vehicle speed on curved bridges. The proposed simplified impact equations are appropriate for the design of both curved single box and multi-box girder bridges.
机译：本文提出了一种简化的方法来确定由于车辆在粗糙的桥面板上行驶而引起的弯曲钢箱梁桥的动态载荷。弯曲的单箱梁桥被分为许多薄壁梁单元。弯曲的多箱梁桥建模为弯曲的格栅系统。分析型车辆被模拟为具有11个自由度的非线性车辆模型，是HL-93卡车，如美国国家公路和运输官员协会（AASHTO）规范中所述。卡车参数包括车身，悬架和轮胎。使用随机过程（功率谱密度函数）模拟桥面板表面。 28根三跨连续单箱梁桥和216块三跨连续多箱梁桥的动态荷载，跨度范围为22,83-30,48-22,86 m至64,01-85,34分析-60,01 m。分析结果表明，弯箱梁桥的扭转影响因子可能较高，而弯矩，剪力和挠度的影响因子通常比相应的直箱梁桥要小，这是由于弯桥上的车速受到限制。所提出的简化冲击方程式适合于弯曲的单箱和多箱梁桥的设计。

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