The Displacement Control And Stability Analysis Of One-Way Cable-Strut Truss

Prestressed cable-strut truss is a flexible structure system,which is favored by many architects because of its light weight,simple structure layout and unique architectural rhythm.Because of its structural form suitable for large-span roofs and glass curtain walls,it has been adopted by more and more buildings in recent decades.The introduction of prestressed technology leads into the design concept of common truss structures can make full use of the tensile capacity of high-strength material cables to replace ordinary steel members,so as to achieve the goal of safe,economical and efficient construction.Compared with the ordinary research of truss structure system,mechanical analysis and research of prestressed cable-strut truss system is relatively backward in the practical engineering apply,so the displacement control of prestressed cable-strut truss and stability of prestressed cable-strut truss is is worth studying further.According to the characteristics of the prestress cable-strut truss,this paper focuses on the following aspects:Firstly,the research results at home and abroad are summarized,and the basic theory of the prestressed cable-strut truss structure is summarized.The basic structure form and the basic definition in calculation are introduced.The basic method of the prestressed cable-strut truss shape-finding and the selection of calculation parameters are given.Secondly,three factors affecting vertical displacement control in cable-strut truss are introduced,and the basic theories and control methods of prestressed control,section size control and structural height control are defined.The restrictive relationship among the three factors is also expounded.Once more,two kinds of stability theory of structural stability design are introduced,and the calculation model is analyzed by using its principle.The influence of the cable-strut structure arrangement,the prestress and the constraints of the external members on the stability of the truss is discussed.Finally,Through the calculation study of practical engineering cases,the selection basis of similar projects is summarized.