【摘要】 首先,回顾了国内外多塔连跨悬索桥的工程发展概况。进而总结其上部结构总体设计和主要构件设计的技术特点。阐述了中央扣和弹性索的区别、联系以及各自在大跨度多塔连跨悬索桥领域的应用。最后,归纳了提高多塔连跨悬索桥纵向刚度这一核心问题的三大途径,即增大中塔纵向抗弯刚度、采用塔梁固结体系和改变缆索体系。更多还原

【Abstract】 First,the development situation of multi-pylon multi-span suspension bridges at home and abroad was reviewed.Next,the technical features of overall design of superstructure and design of main components were summarized.Then,the difference and relation between central buckle and elastic cable as well as their application on long-span multi-pylon multi-span suspension bridge were elaborated.Finally,three approaches to improve longitudinal stiffness of multi-pylon multi-span suspension bridge,i.e.,increasing the longitudinal flexural stiffness of mid-pylon,adopting the pylon-girder fixed system,and changing the cable system,were summed up.更多还原