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根据斜拉桥一阶纵漂的运动特征,建立相应的概念简化模型,进行一阶纵漂频率的近似计算。根据工程实例说明两个简化模型分别可以应用的工程情况,且具有较高的精度。对影响斜拉桥一阶纵漂频率的相关因素进行讨论,从概念上说明主梁的总体质量在频率计算中并不是最为关键的因素,而拉索的布置状况对其频率大小起着决定性作用。
According to the motion characteristics of the first-order longitudinal drift of cable-stayed bridge, a corresponding simplified conceptual model is established and the approximate calculation of first-order longitudinal drift frequency is carried out. According to the engineering example, the two simplified models can be applied to the project situation, and with high accuracy. The discussion of the factors that affect the first-order longitudinal drift frequency of cable-stayed bridges shows that the overall mass of the main beam is not the most critical factor in the frequency calculation, and the arrangement of the cables plays a decisive role in the frequency .