Abstract
<p>To improve the durability of the main cable of the suspension bridge, a new dehumidification system for delivering dry air from the interior of the main cable is proposed. The dehumidification system delivers dry air through the dry air supply conduct embedded inside the main cable, which can improve the dry air delivery efficiency. Based on the 1560m long-span suspension bridge of Longtan Yangtze River Bridge, the overall design of the new dehumidification system of the main cable is carried out. The components of the new dehumidification system are designed, the key technologies for the design of the new dehumidification system are clarified, and the corresponding solutions are proposed. To verify the dehumidification effect of the new dehumidification system, the main cable dehumidification test was carried out to test the relative humidity change pattern inside the main cable during the dry air delivering process. The test results show that the new dehumidification system has a good dehumidification effect and can be used to protect the main cable of the long-span suspension bridge against corrosion.</p>
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