【摘要】 索杆张拉结构体系以其简洁明确的力学概念为大跨度结构的应用创造了新的奇迹.本文从工程应用的角度,以索穹顶结构为描述对象,对索杆张拉结构的设计和施工成形分析进行了系统的研究.首先,本文首次提出基于体系平衡矩阵将杆单元内力转化为悬链线索单元内力,并可同时考虑节点荷载、保持体系设计构形的理论方法;其次,本文首次提出基于动力松驰法的控制索段原长的张拉下斜索施工分析及模拟方法.依据本文理论编制的程序成功对一小型索杆张拉结构的设计和施工过程进行了分析模拟.更多还原

【Abstract】 A new method for the design and construction simulation of cablestrut tensile structures is presented in this paper.For flexible tensile structures, the design and construction can not be seperated,that is,the construction of tensile structures is also a part of the design procedure.So this paper discusses the whole process of design and construction.A new method for force finding considering the nodal loads and selfweight of all elements is first put forward,which can quickly find the internal force vector of the structure by using the general inverse of equilibrium matrix of the system as an iteration tool.Secondly,the dynamic relaxation method is adopted for the first time to look for the equilibrium state of the system.Thirdly,a new control strategy of construction is proposed by controlling the original length of the catenary cable element. Finally, a numerical example is given to verify the proposed theory and method.更多还原