【摘要】 异形桥塔斜拉桥在近些年来得到快速的发展，但是其桥塔的造型造成了其受力形式复杂的空间特性，难以形成统一的计算结论。辅助墩的计算同样也是难以通过理论计算得到普遍性的结果，一般要通过试算找到其最佳位置。针对一座空间扭索面曲塔斜拉桥进行了整体和节段的有限元计算分析，对其辅助墩的设置以及索塔节段的承载力进行了研究。结果表明，辅助墩对前跨应力、前跨变形、后跨变形和主塔变形影响较大；辅助墩的位置选取符合拟合函数计算结果；在设计尺寸范围内，弯曲对抗弯承载力降低的影响大于扭转；弯扭耦合效应带来的抗弯承载力降低可近似看作两个因素的线性叠加，拟合得到的回归公式与模拟值之间的相关性较好。更多还原

【Abstract】 It has been doing extensive research on irregular cable-stayed bridge with a spatial twisted surface tower in recent years, but it is difficult to analyze the spatial force bearing properties of the irregular cablestayed bridge due to its complex spatial characteristics. The design and force analysis of auxiliary piers is also difficult to obtain universal results through theoretical calculations. It is generally designed the optimal position of auxiliary piers through repeated trial-calculations. In this paper, a finite element analysis was carried out on a cable-stayed bridge with a spatial twisted surface tower. The optimal position of auxiliary piers and the bearing capacity of tower segment were studied. The results show that the auxiliary piers have significant impact on the front span stress, front span deformation, back span deformation, and main tower deformation.The position selection of the auxiliary pier conforms to the fitting function calculation results. The effect of bending radius on the reduction of flexural bearing capacity is greater than that of torsion angle with the designed size. The reduction of flexural bearing capacity can defined as a linear additive principle of both effect of the ending radius(R) and torsion angle （φ）. And there is a clear correlation between the fomula and the simulation value.更多还原