节点文献
某天桥顶部组合拱架结构的地震响应分析
Earthquake Response Analysis of Arch Structure at top of A Platform Bridge
【摘要】 文章以某景观过街天桥的造型部分——61m跨度组合拱架为研究对象,建立空间计算模型,并应用ANSYS有限元程序对该桁架的自振特性及谱响应进行了分析。结果表明:结构的自振以整体平动为主;结构的地震响应沿X—Z平面对称,并以弯矩为主;结构在地震作用沿X轴方向输入时的响应最大;主拱交点处的截面最薄弱。
【Abstract】 Focusing on 61m-span arch truss unit——the form part of the across- street platform bridge in a landscape--as a re-search object, space calculation model is established and vibration characteristics and spectral response of the truss is analyzed by AN- SYS finite element program. The results show that: the vibration of structure is mainly level moving as a whole; earthquake response of structure is symmetrical along X- Z plane and is mainly the moment; earthquake response of the structure is the strongest along the X axis and the weakest at the cross- section of the intersection of the main arch.
【Key words】 arch truss unit; finite element analysis; earthquake response;
- 【文献出处】 科学之友(B版) ,Friend of Science Amateurs , 编辑部邮箱 ,2008年11期
- 【分类号】U441.3
- 【下载频次】17