论文部分内容阅读
利用第一部分研究中的力学模型,对地锚式单跨独斜塔斜拉桥进行参数分析。选取地锚箱位置、主塔倾斜角、主塔高度、主梁和主塔自身刚度5种关键参数,研究它们对结构受力的影响。同时,采用有限元方法进行对比,方程求解值与有限元计算结果吻合良好。研究表明:地锚索水平倾角的取值范围宜为39°~54°;主塔向地锚侧倾斜5°对主梁受力最有利;主塔和主梁的高跨比为0.6较为合理。增大主梁尤其是主塔自身刚度对改善结构受力作用不大,调整地锚箱位置等关键参数更为有效。
Using the mechanical model in the first part of the paper, the parameters of the cable-stayed bridge with single-span single-inclined single tower are analyzed. Five key parameters including the position of the anchor box, the angle of the main tower, the height of the main tower and the rigidity of the main girder and the main tower are selected to study their influence on the bearing capacity of the structure. At the same time, compared with the finite element method, the equation is in good agreement with the finite element method. The results show that the range of horizontal inclination of ground anchor should be 39 ° ~ 54 °, the main tower should be inclined by 5 ° to the ground anchor, which is most favorable for the stress of main beam, and the high span ratio of main tower and main beam is 0.6. Increasing the rigidity of the main girder, especially that of the main tower itself, has little effect on improving the structural stress and the key parameters such as the position of the adjusted anchor box are more effective.