论文部分内容阅读
斜拉桥中采用塔上鞍座锚固的钢绞线拉索在金属管道内受到摩阻效应的影响而具有抗滑锚固性能,该文分析了摩擦型及机械型锚固构造的传力机理,讨论了永久作用及可变作用对拉索抗滑性能的影响,建立了计算模型并编制了程序,以此为工具对南昌朝阳大桥的塔上锚固装置进行了计算。经过研究得出结论:鞍座区钢绞线拉索在不平衡力作用下的摩擦角比值可作为抗滑措施选用的依据,机械型抗滑装置可利用鞍座区的反向摩阻效应锚固拉索,鞍座区钢绞线拉索在可变作用下的响应由于受摩阻效应影响会发生累积。
Cable stayed cables anchored by tower saddles in cable-stayed bridges have anti-slip anchorage performance under the effect of friction resistance in metal pipes. This paper analyzes the transmission mechanism of friction and mechanical anchorage structures, The effects of permanent and variable effects on the anti-skid performance of cables were studied. The calculation model was established and the program was compiled. Based on this tool, the anchoring devices on the tower of Nanchang Chaoyang Bridge were calculated. After research, it is concluded that the ratio of the friction angle of strands of steel strands in the saddle area under the unbalanced force can be used as the basis for the selection of anti-slip measures. The mechanical anti-skid device can utilize the reverse frictional effect of the saddle area to anchor Cable, saddle area Strand cable in the variable response due to the friction effect will occur cumulative.