一种设置成桥预拱度的分段正弦曲线法

A Segmented-sinusoid Method for Setting Bridge Camber

针对连续刚构桥成桥预拱度的设置问题,提出了一种计算成桥预拱度的分段正弦曲线法。考虑连续刚构桥的收缩徐变、活载、预应力损失影响,采用分段正弦曲线将成桥预拱度拟合成为平滑曲线,得到了成桥预拱度值。通过一座实桥的成桥预拱度分析可知,分段正弦曲线法拟合的成桥预拱度的相关系数达到了0.99以上,验证了分段正弦曲线法的可靠性,保证了桥梁行车的舒适及受力的安全,具有较高的推广与应用价值。

According to the bridge camber setting of the continuous rigid frame bridge, a segmented-sinusoid method for the calculation is proposed. Considering the influence of shrinkage, creep, live load and the prestress loss of the continuous rigid frame bridge, the bridge camber could be fitted to smooth curve by using this method, meanwhile the value of the bridge camber could be obtained. Through the analysis of bridge camber of a real bridge, the results show that, the correlation coefficient of bridge camber, which be fitted by the segmented-sinusoid method, has reached 0. 99 above. Therefore, the reliability of the segmented-sinusoid method is verify, it also ensure that the comfort of driving on bridge and the safety of the bridge which under forces, so it is of high popularization and application value.