The common rope in the membrane structure is steel wire rope, etc. According to the different position and function of the cable, the cable can be divided into side cable, notochord, valley cable and pull cable.
The membrane structure system is composed of membrane body, supporting structure, anchoring system, node and cable.
1. Membrane body
Membrane materials are generally divided into three categories: A membrane materials (glass fiber substrate, PTFE coating), B membrane materials (glass fiber substrate, silicone coating), C membrane materials (polyester filament substrate, PVC coating), I .e. membrane materials are composite materials composed of high-strength fabric substrate and polymer coating. Depending on the substrate and surface coating.
2. Support structure
Therefore, the device accuracy of the support structure is higher. Before the membrane body hoisting device, the membrane structure is supported on a certain structural system. According to the different support conditions, the cable-membrane structure support system is divided into three categories: rigid support system, flexible support system and hybrid support system. Because the membrane structure depends on the prestress in the structure to form the shape of the building. The supporting structure shall be retested according to the specifications and design requirements, and the retest records shall be made.
3. Anchoring system
The prestress of the cable and membrane is borne by the border structural members instead of the self-balancing structure. The tensile anchoring system can be divided into the following categories: gravity anchoring system, uplift pile anchoring system, resistance anchoring system (plate type, mushroom type, retaining wall type) friction anchoring system and rock anchoring system. A cable membrane structure belonging to a self-balancing system.
4. Nodes
Membrane boundary refers to the connection between the membrane material and the support structure, and the connection of the membrane structure includes membrane node, membrane boundary, membrane corner point, membrane ridge and membrane valley. A membrane node refers to a connection between membrane cuts. The membrane corners are the points where the membrane boundaries meet, and the membrane ridges and valleys are the connections of the membranes at the highest and lowest points of the support structure. Node design is an indispensable part of membrane structure design. When designing nodes, it is not only necessary to consider the functional requirements of nodes, but also to meet the needs of aesthetics, and as a roof node, it should also have good waterproof performance.
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