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首页> 外文期刊>Journal of bridge engineering >Field Load Rating and Grillage Analysis Method for Skewed Steel Girder Highway Bridges
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Field Load Rating and Grillage Analysis Method for Skewed Steel Girder Highway Bridges

机译：偏置钢梁高速公路桥梁的现场载荷额定值与烧烤分析方法

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摘要

An innovative load rating method for skewed highway bridges with steel girders is proposed in this paper. In the proposed method, a field test coupled with a grillage analysis is used to determine the actual safe load-carrying capacity of a bridge and the key factors that contribute to the capacity. Because the actual behavior of the bridge is incorporated via the field test, the method provides a justifiable evaluation of system behavior. The effect of additional system stiffness due to bridge skew is determined using a grillage analysis. The proposed method allows the factors that contribute to the load rating, such as critical span adjustment, longitudinal and lateral load distribution, unintended composite action, slab flexure, and additional system stiffness, to be quantified and qualified. The proposed method is illustrated using a case study of a symmetric steel girder bridge with a 43 degrees skew angle. The case study demonstrates that the proposed method provides an accurate determination of the skew effect, compared to approximate methods of analysis, because the location of the girder and moment under consideration, the cross frames and parapets, and the location of the applied loading are explicitly incorporated.
机译：本文提出了一种具有钢梁偏斜桥的​​创新载荷额定值方法。在所提出的方法中，使用与格栅分析相结合的现场测试来确定桥梁的实际安全承载能力和有助于容量的关键因素。由于桥的实际行为通过现场测试并入，因此该方法提供了对系统行为的正当评估。使用毛坯分析确定由于桥偏振引起的附加系统刚度的影响。该方法允许有助于负载额定值的因素，例如临界跨度调节，纵向和横向载荷分布，意外复合动作，板坯弯曲和附加系统刚度，以进行量化和合格。使用具有43度倾斜角度的对称钢梁桥的案例研究来说明所提出的方法。案例研究表明，与近似分析方法相比，所提出的方法提供了准确的确定，因为近似分析方法，因为所考虑的梁和时刻，交叉框架和栏杆以及所施加的装载的位置是明确的纳入。

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