锚箱式并排拉索索梁锚固结构设计与受力分析  

Design and Mechanical Study of Steel-Anchor-Box at Cable-Girder Anchorage Structure for Parallel Cables

作　　者：吴国强[1] 邹敏勇[1] 易伦雄[1] 张州[1] WU Guoqiang;ZOU Minyong;YI Lunxiong;ZHANG Zhou(China Railway Major Bridge Reconnaissance&Design Institute Co Ltd,Wuhan Hubei 430056,China)

机构地区：[1]中铁大桥勘测设计院集团有限公司,湖北武汉430056

出　　处：《中国铁路》2020年第7期121-126,共6页China Railway

摘　　要：商合杭高速铁路芜湖长江公铁大桥主桥为主跨588 m的高低矮塔钢桁梁斜拉桥,其主梁采用2片主桁的钢桁梁,上层板桁组合、下层箱桁组合,斜拉索锚固在桁架腹杆外侧的下层钢箱内。在"主力+附加力"组合下,斜拉索的最大单索索力达16 000 kN,因此,设计采用单个锚点锚固2根斜拉索的锚箱式并排拉索索梁锚固结构。为研究该类型结构的受力特性,建立细部有限元模型进行计算分析,得到各构件的受力特点与传力特性,验证了设计的可靠性。The main bridge of Wuhu Yangtze River Rail-cum-Road Bridge of Shangqiu-Hefei-Hangzhou Railway is an asymmetric low-pylon cable-stayed bridge with a main span of 588 m. The girder has two trusses while the upper deck is plate-truss composite structure and the lower deck is box-truss composite structure. The cable is anchored to the steel box outside of the steel truss. A steel-anchor-box at cable-girder anchorage structure for parallel cables was designed to bear the huge cable force which reached 16 000 k N. A detail FEM model was built to analyze the mechanical and force-transfer characteristics of the cable-girder anchorage structure, which demonstrate the reliability of the design.

关 键 词：商合杭高铁 公铁两用桥 索梁锚固 并排拉索 受力特性 有限元模型 

分 类 号：U443[建筑科学—桥梁与隧道工程]