拱支预应力网架结构的预应力全过程分析方法  

ANALYTICAL METHODS FOR THE WHOLE PRESTRESSING PROCESS OF ARCH-SUSPENDED PRESTRESSED SPACE GRIDS

作　　者：周臻[1] 孟少平[1] 吴京[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《工程力学》2007年第12期93-99,共7页Engineering Mechanics

基　　金：建设部软件科学研究资助项目(06K307)

摘　　要：以武汉长江防洪模型试验大厅为工程背景,提出一种新型的杂交空间结构体系:拱支预应力网架结构。结合该结构体系的特点,从索初始形变的角度出发,建立了该结构的刚度法理论,并提出了预应力全过程分析的混合影响矩阵法、循环迭代逼近法、索初始形变"顺序分析法"以及索张拉力"顺序分析逆迭代法"等方法,形成该结构预应力全过程分析的完整理论,不仅适用于拱支预应力网架结构,也适用于其它类似的杂交空间结构。最后,通过长江防洪模型试验大厅工程实际算例验证了该方法的准确性和有效性。This paper focuses on the whole prestressing process analysis for arch-suspended prestressed space grids. This structural type has been applied to Wuhan Yangtse-River model-testing hall. Considering its characteristics and from the viewpoint of cable initial deformation, the stiffness theory is established for this structure. Some methods are brought forth, such as mixed influence matrix method, cycling iterative method, sequential analysis method, and sequential-inverse iterative method. The proposed methods are also suitable for other similar hybridized structures. Wuhan Yangtse-River model-testing hall is taken as a numerical example. The results show the accuracy and efficiency of the proposed methods.

关 键 词：预应力空间结构 拱支预应力网架 预应力分析 张拉施工过程分析 索初始形变 杂交空间结构 

分 类 号：TU394[建筑科学—结构工程]