斜拉扣挂缆索吊装系统全过程仿真分析研究

Analysis of Cable-stayed Suspension System Basic on Refinement Numerical Simulation

在拱桥的斜拉扣挂缆索吊装施工中缆扣一体化已成为发展趋势,但目前受限于分析手段的限制数值仿真技术还无法完整地模拟其施工过程,以致对该系统全过程的力学特性还缺乏深入的了解。为此本文以杭州市金昌路桥施工为背景提出了在斜拉扣挂模型基础上引入缆索单元进行全过程仿真分析的计算方法,并以通用有限元软件内置的摩擦接触行为为基础提出了可精确模拟主缆与索鞍相互作用的仿真方法和全过程仿真模型,该模型能够仿真整个施工过程中缆-拱-索-塔各构件的力学状态,为结构设计和结构安全提供更加可靠地依据,同时该方法对于提高悬索桥施工模拟、预应力体外束张拉等工艺的仿真技术有着重要的借鉴意义。

The integration of cable buckles in the construction of cable-stayed cable slings of arch bridges has become a development trend,but the numerical simulation technology limited by the analytical means is still unable to fully simulate the construction process.As a result,there is still a lack of in-depth understanding of the mechanical properties of the entire process.In this paper,based on the construction of Jinchang Road Bridge in Hangzhou,the calculation method of the whole process simulation analysis based on the cable-stayed suspension model was proposed.Based on the friction contact behavior built in the general finite element software,a simulation method and a full-process simulation model for accurately simulating the interaction between the main cable and the cable saddle are proposed.The model can simulate the mechanical state of the cable-arch-rope-tower components during the whole construction process,providing a more reliable basis for structural design and structural safety.At the same time,the method is used to improve the suspension bridge construction simulation,prestressing external beam tensioning and other processes.The simulation technology has important reference significance.