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首页> 外文期刊>Journal of bridge engineering >Impact Factors for Curved Continuous Composite Multiple-Box Girder Bridges
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Impact Factors for Curved Continuous Composite Multiple-Box Girder Bridges

机译：弯曲连续复合多箱梁桥的影响因素

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摘要

The results from a parametric study on the impact factors for 180 curved continuous composite multiple-box girder bridges are presented. Expressions for the impact factors for tangential flexural stresses, deflection, shear forces and reactions are deduced for AASHTO truck loading. The finite-element method was utilized to model the bridges as three-dimensional structures. The vehicle axle used in the analysis was simulated as a pair of concentrated forces moving along the concrete deck in a circumferential path with a constant speed. The effects of bridge configurations, loading positions, and vehicle speed on the impact factors were examined. Bridge configurations included span length, span-to-radius of curvature ratio, number of lanes, and number of boxes. The effect of the mass of the vehicle on the dynamic response of the bridges is also investigated. The data generated from the parametric study and the deduced expressions for the impact factors would enable bridge engineers to design curved continuous composite multiple-box girder bridges more reliably and economically.
机译：提出了对180座弯曲连续复合多箱梁桥的影响因素进行参数研究的结果。推导了AASHTO卡车装载时切向弯曲应力，挠度，剪切力和反作用力的影响因子的表达式。利用有限元方法将桥梁建模为三维结构。分析中使用的车轴被模拟为一对集中力，它们在混凝土甲板上沿圆周路径以恒定速度运动。研究了桥梁结构，装载位置和车速对冲击系数的影响。桥梁配置包括跨度长度，跨度与曲率半径之比，车道数和箱数。还研究了车辆质量对桥梁动力响应的影响。从参数研究中得出的数据和影响因素的推导表达式将使桥梁工程师能够更可靠，更经济地设计弯曲的连续复合多箱梁桥。

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