基于索鞍无预偏施工悬索桥的施工仿真

针对索鞍无预偏的悬索桥施工设计，通过基于悬索力学的解析迭代法与基于有限位移理论的有限元法相结合，系统地进行了施工中的主索下料长度、空缆状态及空缆标高、加劲梁吊装阶段的主塔受力和变形以及锚跨索股张拉时机与张拉量等控制参数的仿真计算；并利用ANSYS程序和有限位移理论在悬索桥施工仿真应用时解的延续性和可逆性，从link10单元初应变调整入手，放弃初始状态试算的大循环迭代方法，建立了利用通用程序从结构成桥状态倒退到初始状态的有效方法。

Construction simulation for suspension bridge with non-pre-bias of cable saddle

To the design of suspension with non-pre-bias of cable saddle, the combined method between analysis iteration method based on cable mechanics and FEA method based on finite displacement theory are introduced. The simulation method of control parameter at fabrication length of the main cable, initial construction state and initial cable height, main tower stress and deformation in the stage of stiffening-girder lift on and anchor span strand jack time and displacement is put forward. Using FEA program ANSYS and the solution reversibility and continuum of finite displacement theory in applying to suspension bridge construction simulation, starting with adjusting the initial strain of element linkl0, abandoning the circulation trial method for initial construction state, the efficiency method from the bridge finishing state back up to initial state is established. 3 tabs, 13 figs, 10 refs.