索拉穹顶结构动力特性分析  

Dynamic characteristics of cable-beam shells

作　　者：汪凯 孟瑶[2] 韩运龙[2] 冯健[2] 蔡建国[2] 

机构地区：[1]中铁芜湖建筑设计研究院有限公司,安徽芜湖241000 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室江苏省预应力工程技术研究中心,江苏南京210096

出　　处：《四川建筑科学研究》2011年第5期164-166,共3页Sichuan Building Science

基　　金：江苏省自然科学基金资助项目(BK2006104)

摘　　要：索拉穹顶是一种新型大跨空间结构,比较了索拉穹顶和普通穹顶的自振频率及其对应的振型且较详细地讨论了这种新型结构的动力特性。然后,计算了各种参数(长跨比、矢跨比、索截面、索初始预应力、钢杆件截面)对索拉穹顶动力特性的影响。计算结果显示:索拉穹顶的动力特性优于普通穹顶;索拉穹顶的自振频率随矢跨比的增大,先增大后减小,随钢杆件截面、索截面的增大而增大;索的初始预应力对索拉穹顶的动力特性影响很大。Cable-beam shells is a new structure of large-span space,this article discussed the dynamic properties of this structure,and self-vibration frequency and its corresponding mode shapes of cable-beam shells and the common shells were compared.Then this article calculated the various parameters（rise-span ratio,cable cross-section,prestress of cables,section areas of steel bars） which impact dynamic characteristics of cable-beam shells.The results showed：dynamic properties of cable-beam shells were superior than dynamic characteristics of common shells;self-vibration frequency of cable-beam shells firstly increased then decreased with the increase of rise-span ratio and increased with section areas of steel bars and cable cross-sections;prestress of cables had great influence on the dynamic characteristics of cable-beam shells.

关 键 词：索拉穹顶 自振频率 振型 

分 类 号：TU33[建筑科学—结构工程]