异形索桁架结构浮动式连接可行性研究

针对异形索桁架特殊的结构形式,从拉索结构适应温度变化、对主体结构产生影响、应力及挠度控制和造价几个方面出发,提出异形索桁架通常的硬性连接和新型的两种浮动式连接方式,并对这3种方案形式的构造和受力分别做了分析,利用通用的有限元程序,对3种方案的结构形式在各种工况条件下分别进行静力计算和对主体结构产生影响的分析,同时对3种结构形式的动力响应进行分析,系统地对3种连接方案的异形索桁架从温度变化、对结构产生的影响、挠度控制和工程造价方面分别做了对比性说明,对3种索桁架的动力特性做了具体对比,提出合理的建议,可作为今后索桁架节点设计的参考。

FEASIBILITY STUDY ON MOVING CONNECTION OF SPECIAL-SHAPED CABLE TRUSS STRUCTURE

According to the special shape of a cable truss structure, considering several aspects such as influence of temperature fluctuation of cable structure on main structure, stress or deflection control and costs etc., this paper puts forward three connection ways. One is the usual connection way of special-shaped cable truss-rigid connection. The others are the new moving connections.This paper analyzes the construction and force of three schemes. Using finite element software, the paper makes a static force calculation and analyzes the influence on main structure under all working conditions respectively. Meanwhile, the paper analyzes the dynamic response of three structural types. For three connection types of irregular cable truss, a systematical comparison is made from the above-mentioned four aspects. In addition, a specific contrast is carried out to the vibratility of three cable trusses. Based on the above analysis and calculation, some reasonable suggestions are given as a reference for the future designing joints of cable trusses.