拱塔斜拉桥桥塔钢-混结合段空间受力分析  

Analysis of spatial mechanical behavior of steel-concrete combined sections of an arch-tower cable-stayed bridge tower

作　　者：张西丁[1] 石雪飞[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《交通科学与工程》2013年第2期35-40,55,共7页Journal of Transport Science and Engineering

摘　　要：斜拉桥桥塔钢-混结合段结构复杂,构件众多,使得其受力状态极为复杂.以某拱塔斜拉桥的桥塔钢-混结合段为基础,利用Midas/Civil建立空间杆系模型,进行整体静力分析,确定桥塔钢-混结合段部位3种最不利荷载工况,得出其荷载和位移的边界条件.再利用大型空间有限元软件ANSYS,建立桥塔钢-混结合段三维实体模型,并进行受力分析,明确钢-混结合段处钢板和混凝土的受力性能.计算结果表明:钢-混结合段的变形较小,钢板和混凝土的应力水平较小,结构的安全储备良好.The combined sections of cable-stayed bridge tower contain many members,so that the stress had been extremely complex.Based on the tower of an arch-tower cable-stayed bridge,Midas/Civil is used to establish a space truss model for the overall analysis to determine the most unfavorable parts of the steel-concrete combined sections under loading and displacement conditions.With the larger general-purpose finite element software ANSYS,three-dimensinal solid model is established,which can determine the performance of steel and concrete of the combined sections.The calculated results show that the deformation and stress level of steel-concrete composite section is small,which can show the structure is safe.

关 键 词：拱形桥塔 钢-混结合段 有限元法 局部分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]