斜拉桥拉索线密度对拉索索力测量的影响分析

用频率法测试斜拉桥拉索索力是一种快速有效的现场索力测试方法，但在索力计算过程中，拉索索长、线密度、抗弯刚度等参数的取值直接影响到索力测试精度。针对新兴大桥拉索的特殊性，研究得出，对低应力防腐拉索，其线密度取值应扣除拉索内部油脂的质量，修正后计算得到的索力值与用压力表测定法得出的张拉力对比，吻合度较好，可以作为类似工程的借鉴和参考。

Analysis of Cable Force Measurement Influeneed by Its Thread Density on Cable-stayed Bridge

Frequency method on testing cable force of cable-stayed bridge is an on-the-spot testing method, it is a quick and effective method. In calculation, there are many parameters affecting testing precision, such as cable length, thread density, bending stiffness and so on. Aiming at the cable specialty of Xinxing Bridge, the technicians draw the conclusion that in calculation of thread den- sity about low stress antiseptic cable, its inner oil mass should be deducted. On this rectification, the cable force is identical to the lifting jack force, it is useful for reference for similar bridge engineering.