弦弓式预应力网壳结构的工程应用  

THE PRATICAL APPLICATION OF STRING-BOW LATTICED SHELL STRUCTURE

作　　者：罗尧治[1] 姜涛[1] 

机构地区：[1]浙江大学空间结构研究中心

出　　处：《工业建筑》2006年第6期92-95,共4页Industrial Construction

基　　金：国家自然科学基金资助项目(批准号:50378083)

摘　　要：结合实际工程背景,提出了新颖的弦弓式预应力柱面网壳结构,并应用于大跨度电厂干煤棚结构中。详细分析了结构的静力特性,采用了振型分解反应谱法计算了水平和竖向地震作用下结构的响应。提出了静载下支座位移为零的预应力施加准则,不仅使结构基本成为自平衡体系,而且降低了施工难度。计算分析表明,该结构整体刚度较大,杆件内力峰值较小,大部分杆件内力受斜风及温度作用的控制,用钢量仅为34kg/m2;结构受水平地震作用影响较大,杆件地震内力系数最大值为0.22。Based on practical engineering background, the string-bow pre-stressed latticed shell structure is proposed and applied to large-span indoor coal storage yard design for the first time. The static behaviors of the structure are analyzed in detail, and the seismic performances are calculated by the modal response spectrum method. The principle of pre-stress application, which ensures the supports unmoved under dead load, is also proposed. This principle not only makes the structure basically self-balanced, but also simplifies the construction. The analysis results show that the pre-stressed cables enhance the rigidity of the shell, reduce the internal force and make the shell much lighter, only 33.3kg/m^2. Most internal forces of the struts are controlled by wind and temperature effect and the structure is more subject to the horizontal seismic effect than the vertical seismic effect. The maximum seismic force ratio of the shell reaches 0.22.

关 键 词：弦弓式预应力网壳 预应力施加准则 干煤棚 结构静动力特性 

分 类 号：TU399[建筑科学—结构工程]