王晓明, 贺拴海, 段瑞芳. 空间索形自锚式悬索桥吊索张拉过程分析方法[J]. 工程力学, 2016, 33(10): 164-172. DOI: 10.6052/j.issn.1000-4750.2015.03.0168
引用本文: 王晓明, 贺拴海, 段瑞芳. 空间索形自锚式悬索桥吊索张拉过程分析方法[J]. 工程力学, 2016, 33(10): 164-172. DOI: 10.6052/j.issn.1000-4750.2015.03.0168
WANG Xiao-ming, HE Shuan-hai, DUAN Rui-fang. HANGER TENSIONING PROCESS ANALYSIS OF SELF-ANCHORED SUSPENSION BRIDGE WITH SPATIAL CABLES[J]. Engineering Mechanics, 2016, 33(10): 164-172. DOI: 10.6052/j.issn.1000-4750.2015.03.0168
Citation: WANG Xiao-ming, HE Shuan-hai, DUAN Rui-fang. HANGER TENSIONING PROCESS ANALYSIS OF SELF-ANCHORED SUSPENSION BRIDGE WITH SPATIAL CABLES[J]. Engineering Mechanics, 2016, 33(10): 164-172. DOI: 10.6052/j.issn.1000-4750.2015.03.0168

空间索形自锚式悬索桥吊索张拉过程分析方法

HANGER TENSIONING PROCESS ANALYSIS OF SELF-ANCHORED SUSPENSION BRIDGE WITH SPATIAL CABLES

  • 摘要: 针对空间索形自锚式悬索桥的吊索张拉施工过程,以主缆、吊索的下料长度为联系,从施工过程临时体系的力学平衡角度入手,构建吊索上端竖向力矩阵与吊索横向力矩阵,建立各个施工阶段相互独立的力学平衡方程;分别采用多段三维悬链线分析空间索的双向垂度特征,建立了吊索张拉施工过程的精确解析解;所提方法可独立求解任意施工阶段的物理状态,不依赖于前一工况。基于上述优点,采用逐步推进的张拉思路,建立了张拉方案的制定流程,明显提高了优化效率。算例分析表明,该文算法精度高,方案优化效率高。

     

    Abstract: The hanger tensioning process of self-anchored suspension bridge with spatial cables is analyzed. Based on the mechanical equilibrium of the temporary system of any one construction process accounting for the cutting lengths of the main cable and hanger, the top vertical force matrix and lateral force matrix are established respectively. Independent equilibrium equations are established for each construction stage. The multistage spatial catenary is employed to simulate the bidirectional sag characteristics of spatial cables, and then the exact analytical solution is proposed for hanger tensioning process. The proposed method can separately solve the physical effect of any one construction stage without the effect of any previous stage. Based on this advantage, the optimization method of tensioning schemes is proposed using the gradual tensioning method. The example shows that the proposed method can solve tensioning process accurately and improve the optimization efficiency of tension scheme obviously.

     

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