修正的循环迭代法与控制索原长法结合进行杂交空间结构施工控制  

Control of erection of hybridized space structure using the modified cyclic iteration and initial length control methods

作　　者：吕方宏 沈祖炎[2] 

机构地区：[1]上海城乡建筑设计院有限公司,上海200062 [2]同济大学,上海200092

出　　处：《建筑结构学报》2005年第3期92-97,共6页Journal of Building Structures

摘　　要：杂交空间结构(如张弦梁、弦支穹顶)是指由梁、压杆、张力索组成的预应力空间结构体系,预应力施工控制分析是其关键。本文提出了修正的循环迭代法求杂交空间结构零状态结构几何;在求得零状态几何基础上采用控制索应力方法求出每级张拉控制力对应索原长;通过控制索原长方法可方便求得各级张拉控制力下分批张拉时索的张力施工控制值以及节点位移、杆件内力。通过文中两个算例详细演绎了这一方法,验证了以上方法的正确性和有效性。The hybridized space structures, such as the beam string structure and suspen-dome, are the pretensioned space structure composed of beams, tensional cables and struts, in which the prestress-controlling analysis is the key problem. The modified cyclic iteration method is developed to find the structural form under the initial status. With the structural form under the initial status, the initial cable length under prestressed status can be found using the cable stress control method. With the cable initial length, the control value of tensioning construction, the internal force of member, and the nodal coordinate under prestressed status are brought forward by means of the cable initial length control method. The method is demonstrated by two numerical examples, and it is proved that the above-mentioned method is correct and effective.

关 键 词：循环迭代法 控制索原长法 非线性有限元 杂交空间结构 施工控制 建筑结构 

分 类 号：TU393.3[建筑科学—结构工程]