三塔悬索桥中塔主缆与鞍座间抗滑移试验研究

泰州长江公路大桥的初步设计中提出三塔悬索桥设计方案,为了研究特定工况下中塔主缆在鞍座内的滑移情况,江苏省长江公路大桥指挥部主持开展了主缆与中主鞍座间抗滑移试验研究。我国和美国、日本都曾开展过主缆与鞍座鞍槽间摩擦机理分析的试验,由于试验及试验模拟的差异等,试验结果离散性较大。本试验采用与实桥直径相同的镀锌钢丝和具有相同曲率、结构尺寸以及表面处理的鞍槽,力求全面模拟各束股与束股之间、钢丝之间、束股与鞍槽间的真实的接触特征,采用与实桥基本相同的接触挤压应力,以期能较为真实地反映三塔悬索桥中塔主缆在鞍座间的抗滑移情况。

A Study on Slip Resistance Between Main Cable and Saddle on Middle Tower of Three-Tower Suspension Bridge

In order to study the slip resistance between main cable and saddle on the middle tower of the three-tower suspension bridge,Jiangsu Province Yangtze Highway Bridge Construction Commanding Department presides at a slip resistance experiment.In order to analyze the friction situation between the cable and saddle,such experiments are performed by American,Japanese and Chinese engineers.But because the difference of the experimental condition and real contact situation,the experimental results are quite different.The slip resistance experiment of Taizhou Bridge adopted the same diameter galvanized wire and structure size and surface treatment saddle trough to simulate the real contact situation between the wires,the strands,the strands and saddle trough,expecting to response the real slip resistance situation between cable and saddle.