三塔悬索桥刚性中塔的鞍缆防滑技术研究

为了提高三塔悬索桥刚性中塔的鞍缆防滑安全度，研究了5个方案即在跨中设置中央扣、改变矢跨比、在塔根和主缆间设置扣索、在塔顶处设置钢结构构件、在索鞍两侧主缆上添加辅助拉索等的有效性。以泰州长江大桥为工程背景，结合有限元数值方法和解析法，证明了中央扣和扣索方案的效果甚微，而其余三个方案则十分有效，并给出相应的设计建议。

Research on Anti-Slip Technology between Main Cable and Saddle on Rigid Middle Tower of Three-Tower Suspension Bridge

When a rigid middle tower is adopted in a three-tower suspension bridge, a relevant slip may happen between main cable and saddle. The traditional measures for slip resistance have some limitations. In order to improve the anti-slip factor, five structural schemes are proposed, such as adding a central buckle, changing the rise-span-ratio, installing a buckling cable between tower and main cable, setting a steel structure on the top of tower and fabricating an assistant cable near the saddle. Taizhou Changjiang River Bridge is taken as the project background, and both finite element method and analytical method are conducted. The results show that the central buckling scheme and buckling cable scheme are invalid, but the other three schemes are very effective. Some design recommendations are given at the end.