point supported glass curtain wall

The single cable structure glass curtain wall has a history of fifteen or six years in China. For example, “Harbin International Conference Center” was built in September 2002, which is the first single layer cable net glass curtain wall in China. Its single cable net glass curtain wall is 13 meters high, 540 meters in total length, using rectangular splint type supporting device, steel cable usingφ22mm stainless steel stranded wire. Its structure is a glass curtain wall composed of a plurality of single cable network structural units.

Since then, many building curtain wall structure have adopted single cable structure glass curtain wall. One of the most representative glass curtain walls of the northeast facade of “Beijing New Poly Building”, its cable network structure is composed of two main cables that are combined into three interlinked and folded soft cable net surfaces. The width of the hole is 58m and the height is 87m, and the basic glass partition is 1300mm×1300mm. Through the quality return visit of some projects and the understanding of various aspects, many single cable structure office curtain wall is used today, its working condition is good, the internal stress change of cable body and the stability of panel glass can be controlled within the range. However, there are also individual projects that have had problems of one kind or another. Due to the emergence of individual problems, some functional problems and safety problems are more and more widely attracted people’s attention, which requires us to further study the safety and reliability of single cable structure glass curtain wall.

After the glass curtain wall plane is subjected to the external load, the external load is transformed into the joint load P through the glass connecting mechanism, and the joint load P acts on the cable net structure. As long as there is enough prestress NO and deflection F in the cable net, the equilibrium condition of mechanics can be satisfied. When P is a certain value, the deflection F is inversely proportional to the prestress NO. That is, the greater the value of prestress NO is, the smaller the deflection F is. F = P/NO. Therefore, deflection F and prestress NO are two key parameters of single-layer plane cable net, which can only be determined after testing, calculation and analysis. It can also be seen from the schematic diagram of the working principle that when the external horizontal load P is positive and negative, it is resisted by the same steel cable, and its working efficiency is twice that of the types of curtain wall systems. In recent years, glass curtain wall, one-way glass curtain wall structure of single cable surface, contact unidirectional single cable glass curtain wall structure, the form of the curtain wall, Greatly enriched the means of architectural modeling.