索-混凝土板预应力组合网架的自振特性分析  

Analysis of Natural Vibration Characteristics of Cable-Concrete Slab Pre-Stessed Composite Grids

作　　者：孟文清[1] 张超[1] 莫宗云[1] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038

出　　处：《湘潭大学自然科学学报》2010年第1期30-33,共4页Natural Science Journal of Xiangtan University

基　　金：河北省建设厅科学技术处项目(2007-145)

摘　　要：提出了一种上弦为混凝土板、下弦为预应力索的新型预应力组合网架结构形式,利用有限元软件对其进行自振特性分析,得到了结构的各阶振型和自振频率;研究了不同预应力、边界条件、跨度、网架高度对索-混凝土板预应力组合网架结构自振特性的影响,得出了索-混凝土板预应力组合网架结构自振特性的一般规律.This paper presents a new type of pre-stressed composite grids structure that the top chords are concrete slabs and the lower chords are pre-stressed cables. The natural vibration character -ristics are analyzed with finite element software, to get self-vibration frequency and grids different order vibration mode; and the influence of different pre-stressed, boundary conditions, different span and heights on natural frequencies of the cable-concrete slab pre-stressed composite grids structure is studied. The general conclusion of the natural vibration characteristics of the cable-concrete slab pre-stressed composite grids structure is obtained.

关 键 词：索-混凝土板 预应力组合网架 自振特性 

分 类 号：TU755[建筑科学—建筑技术科学]