中文摘要：

为安全快速地实现大跨度悬索桥锚跨索力及散索鞍偏角的施工调整,针对空缆状态下锚跨索力与散索鞍偏角相互耦合的结构特殊属性,研究了锚跨索力及散索鞍偏角施工调整的计算方法。基于小变形假设,并结合大跨度悬索桥的结构特性,计算出散索鞍IP点沿其支承滑移面的平动刚度,根据散索鞍IP点处的力平衡条件,推导出锚跨索影响矩阵,继而将锚跨索力及散索鞍偏角施工调整的目标函数用锚跨索弹性伸长量和散索鞍偏角的形式表示;借助数值仿真软件,基于迭代求解的方式建立了大跨度悬索桥锚跨索力及散索鞍偏角施工调整的计算方法,并根据数值模拟结果提出了锚跨索施工调整顺序及调整量的优化方法。研究结果表明：由锚跨索影响矩阵计算所得的调整后索力同实测值保持一致;按照优化后的理想锚跨索调整方案计算得到的最终索力理论误差在0.1kN以内且调整过程未出现索力过大或者过小的情况;该计算方法理论上能够安全快速地实现锚跨索力及散索鞍偏角的施工调整,且可满足锚跨索的抗滑移要求,具有一定的工程应用价值。

英文摘要：

In order to adjust the anchor span cable forces and the saddle angle of long-span suspension bridge in security and high speed, the calculation method of adjustments of anchor span cable forces and the saddle angle was investigated, considering the special property intercoupling between anchor span cable forces and the saddle angle at cable finished stage. Under the hypothesis of the small deformation, the translational stiffness of the saddle IP in the direction of the slip plane was calculated, taken structural characteristics of long-span suspension bridge into consideration. Based on the mechanical equilibrium condition of the saddle IP, the influence matrix of anchor span cable strands was deduced and object functions for adjustments of the anchor span cable forces and the saddle angle could be uniformly expressed by the elastic elongation and saddle angle. In virtue of the numerical simulation software, a numerical iterative method was used to compute the ideal adjustment of the anchor span cable strands and saddle angle for long-span suspension bridge. By numerical simulation results, the optimization methods of the adjustment order and amounts of anchor span cable strands were proposed. The results show that adjusted cable forces computed by the influence matrix of anchor cable are in agreement with the measured ones. Meanwhile the theoretical errors of the final cable forces are less than O. 1 kN, which are calculated by the ideal cable adjustment scheme, and the cable forces have been not too large or too small in the adjustment process. The calculation method can not only theoretically satisfy the anti-slip requirement, but also adjust the anchor span cable forces and the saddle deflection effectively, with practical value for engineering.