某运营期悬索桥索夹滑移承载能力评估及处治对策研究

Study on Evaluation and Treatment Countermeasures for Bearing Capacity of Cable Clamp Slippage of Suspension Bridge in Operating Period

摘要:

为研究悬索桥索夹滑移对桥梁承载力的影响，以某运营期出现索夹滑移的悬索桥为案例，通过对全桥开展姿态测量、索力测试、主缆开窗检测、吊索锈蚀及开锚检测等专项检测，并结合检测结果进行有限元软件模拟，计算受损桥梁的整体受力状况。结果表明：索夹滑移对桥梁的安全影响整体可控，结构处于稳定状态；对索夹滑移进行常规治理，并加强耐久性防护措施即可，不必进行索夹复位。

Abstract:

In order to study the impact of cable clamp slippage on the bearing capacity of bridge， taking a suspension bridge with cable clamp slippage in operating period as an example， the special tests such as attitude measurement， cable force test， main cable window opening test， suspension corrosion and anchor opening test are carried out on the whole bridge. And combined with the test results， the finite element software simulation is carried out to calculate the whole stress state of the damaged bridge. The results indicate that the impact of cable clamp slippage on the bridge safety is generally controllable， and the structures are at the stable state. It is necessary to treat the slippage of cable clamp by routine and strengthen the durability protection measures， and it is not necessary to reset the cable clamp.