滑动索鞍的试验研究

Experimental Study of Sliding Cable Saddle

摘要:

东明黄河大桥的斜拉体系改造工程是介于矮塔斜拉桥和悬索桥之间的一种新型桥体，采用新型钢丝斜拉体系，并在桥塔上设置滑动索鞍，通过索鞍的自适应滑动，使桥塔两侧的索力平衡。滑动索鞍是新型钢丝斜拉体系的关键技术，有必要进行滑动索鞍的模型试验研究。文中介绍了滑动索鞍性能试验的模型设计以及试验实施方法，并通过智能张拉系统完成了循环耐久试验。试验结果表明，索鞍具有自适应滑动的功能和良好的滑动性能及耐久性，能满足新型钢丝斜拉体系的需求。

Abstract:

In the reconstruction project of cable-stayed system, Dongming Yellow River Bridge is a new type of bridge between the low-pylon cable-stayed bridge and the suspension bridge. In the new type of steel wire cable-stayed system, the sliding cable saddle is set up on the bridge pylon. The adaptive sliding of cable saddle can make the cable force at both sides of the bridge pylon balanced. The sliding cable saddle is the key technology of the new steel wire cable-stayed system. It is necessary to conduct the model test research on the sliding cable saddle. Relying on Dongming Yellow River Bridge, the model design and the implementation method of the performance test of sliding cable saddle are introduced. The cyclic endurance test of cable saddle is completed by intelligent tensioning system. The test results show that the cable saddle has the adaptive sliding function and the good sliding performance and durability, which can meet the demand of the new steel wire cable-stayed system.