不等高支承对双塔单跨悬索桥主缆的影响分析

Research on the Infulence of Main Cable with Unequal Height Support of Suspension Bridge

为了分析主缆不等高支承对其受力和线形的影响,针对主缆不等高支承这一特殊形式的双塔悬索桥,建立有限元计算模型,对主缆的受力和线形进行分析.选择相应的几个主缆关键参数,提取各参数的变化数据,结合相应解析计算公式和辅助细部修正,对数据进行分析和曲线拟合,得到不等高支承对主缆的影响程度和趋势.结果表明,不等高支承对主缆的受力和线形会有较大的影响,会导致主缆的内力和主塔的竖向支反力增大,总体线形偏移,且高塔侧主缆尤为产生较大的影响.

In order to study the influence of force and alignment of main cable with unequal height sup- port, the finite element model was established aiming at the special suspension bridge with unequal height support, and the force and alignment of main cable was analysized. The key parameters of main cable was chosen, and the change data of each parameters was extracted and combined with the corre-sponding analytical calculation formula and detailed auxiliary correct calculation. Curve fitting results was studied and obained the influence of unequal height support. The results show that the unequal height support of main cable has the great effect of main cable, which leads to increase the internal force and reaction and offset the general alignment, especially the high tower side.