自锚式悬索桥空间缆索分析与计算

对空间索面自锚式悬索桥主缆的受力特点进行理论分析。以天津富民海河大桥为例,验证了分析方法与计算方法的可靠性。采用空间模型,通过两个计算步骤对空间缆索悬索桥成桥状态和空缆状态主缆线形进行分析,首先是简化的索体系分析,得出主缆的初始几何形状和主缆水平张力;然后再进行精确分析,利用简化计算得出的结果进行迭代计算,直至收敛。通过缆索受力计算和分析,为今后设计、修建自锚式悬索桥提供一定的计算和分析方法。

Analysis and Calculation of Spacial Cable of Self Anchored Suspension Bridge

The stress of special cable of self anchored suspension bridge is analyzed theoretically.The analysis and calculation method are verified credibly by the case study of Tianjin Fumin Haihe bridge.Using spacial model, the linetypes of the cable on the final stage and initial stage are catculated by two steps.The first is achieving the original geometrical linetype of the cable and the horizontal tension of cable by simplified cable model,then the calculation is analyzed accurately,followed by iterative calculation based on the result of the first stage until convergency.By analyzing and calculating the cable's stress,analysis and calculation method can be referred for the design and build henceforth.