考虑支承结构的弦支穹顶动力特性及参数分析  

Dynamic Properties and Parameter Analysis of Chord Dome under Co-operating Condition of Supporting Structures

作　　者：李峰[1] 李萌[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《水利与建筑工程学报》2010年第3期57-60,共4页Journal of Water Resources and Architectural Engineering

基　　金：陕西省教育厅重点实验室科研计划项目(05JS18)

摘　　要：为研究弦支穹顶结构上部网壳体系和下部支承体系协同工作条件下,对整体结构的自振特性的影响,利用ANSYS软件建立有限元模型,研究网壳屋盖与下部支承结构共同工作时的动力特性,并对其动力特性的影响因素进行分析。结果表明,考虑下部结构的网壳结构自振频率密集,以水平振动为主;网壳跨度和矢跨比是网壳动力特性的主要控制参数,而不考虑下部结构会使弦支穹顶结构地震反应结果有所差异。In order to research the dynamic properties of chord dome under the co-operating condition of supporting structures,the dynamic properties of the finite element model of latticed shell roof which is set up by ANSYS are studied here,and the influencing factors on its properties are further analyzed.The results show that the natural frequencies of latticed shell and supporting structure are dense,and the vibration of the structure is dominated by the horizontal vibration mode.The span of the latticed shell and rise-span ratio are the main control parameters for the dynamic properties of the latticed shell,and it will show the different seismic responses when considering the supporting structure or not.

关 键 词：弦支穹顶 支承结构 动力特性 参数分析 

分 类 号：TU311.3[建筑科学—结构工程]