苏通大桥短期观测流速在设计基准期内的应用

Short-Range Current Velocity Records to Apply in the Reference Period for Sutong Bridge

对缺乏长期流速资料的地区,给出了一种通过当地短期流速资料推算设计基准期参考流速的方法;通过分析苏通长江公路大桥水流速度观测的有关内容,采用实测的短期实际流速记录建立流速概率分布模型,按小样本推算极值的办法,得到大桥的设计基准期的基本流速并进行相关分析,确认计算结果的合理性,建立线性回归方程;为确保大桥在动力荷载作用下的安全应用及苏通大桥工程设计、施工提供可靠的技术指导。

The current velocity of reference period is determined by the local primitive data. A method is introduced to determine the current velocity of reference period through short-range current velocity records for the area that lacks of long-range current velocity records. According to short-range current velocity records of Sutong Bridge the probability distribute mode of the current velocity is established. Presuming the extreme value by way of minority sample, the current velocity of reference period is calculated. Correlation analysis is carried out, the rationality of the calculation is validated and the regression equation is established. The calculated results provide credible technical guide to devise and construct Sutong Bridge and ensure current and wave resistance safety.