Composition and Function of Metal Connector <1> The metal connector mainly includes a support member (commonly known as a paw or a claw seat) and a fastener. The support members are usually cast, welded and molded from stainless steel, aluminum alloy or ordinary steel, and the fasteners are stainless steel machined parts. Metal connectors are the key to point support technology. It fixes the face glass on the support structure, minimizes the additional stress on the edge of the glass hole, and allows a certain displacement to adjust the construction error and glass deformation caused by the building installation, and also has the necessary shock absorption capacity. Improve its seismic resistance, so the factors considered in the design are multifaceted.
In addition, the metal connector also produces a significant decorative effect, so in addition to meeting the functional requirements, it also requires beautiful design and fine processing to achieve / finishing touch. Fasteners are usually available in the form of countersunk heads and floating heads. The countersunk type fasteners sink into the surface of the glass, the surface is flat, and it is not easy to ash and contaminate the glass surface, but the glass has to be tapered, the processing is complicated, and the thickness of the glass cannot be too small.
The typical form of the support member is: (1) the work type claw seat: connected with the fastener for supporting the glass panel, the construction of which is detailed in a. (2) H-type claw seat: the action-type claw seat. There are 4 connection points, which can support the adjacent four corners (b) of the glass respectively. When there are only 2 fasteners, it becomes the work type claw seat. (3) X-shaped claw seat: This type of support is the most common (c). (4) Disc sliding support: This supporting member mounts a plurality of claw seats on the disc, and the claw seat can be moved around the disc shaft on the disc. Suitable for connection of multiple triangular glasses (d).
Stress analysis of a point-supported glass model with a single fastener. If the point-supported glass structure is studied as a whole, the workload of finite element analysis is quite large, and this research method is not convenient for separately studying various parameters. Impact. At the same time, the randomness of defects in the glass and the randomness of the drill have an effect on the strength of the glass, the thickness of the glass plate t, the aperture d of the glass plate, and the fastener form (floating head or countersunk head) stress and bearing capacity of the glass hole of the model. Impact. See the material properties of fasteners and glass sheets.
Add 1kN concentration force to the end of the fastener in each model. The calculation results are shown. The calculation results show that the fastener and the glass are considered as one body, regardless of the model of separation and contact. The maximum principal stress in the glass appears on the edge of the upper and lower pads of the fastener, and the fastener is separated from the glass. With the contact model, the maximum principal stress in the glass appears at the edge of the hole. The maximum principal stress in the glass decreases as the thickness of the glass sheet increases; it decreases as the diameter of the fastener increases. When the thickness of the glass is t>10 mm, the two factors of whether the fastener is in contact with the glass and the glass aperture change have little effect on the maximum principal stress in the model glass of the floating head fastener. When the thickness of the glass is t<10 mm, the two factors of the glass aperture change between the fastener and the glass have a great influence on the maximum principal stress in the glass. This shows that when the glass thickness is large, the finite element calculation of the model can ignore the contact problem and the change of the glass aperture, and the glass thickness is small, it must be considered. The calculation results also show that when the glass is thick, in order to save the fastener material, a smaller diameter fastener (50 mm diameter) can be used, and when the glass is thin, a larger diameter fastener is required ( 70mm in diameter).
In this paper, the development status of the point-supported glass building is proposed. The light weight of the supporting structure is the direction to be researched and developed. The use of a flexible support structure system can greatly change the structure of the structure, the tightness of the rods, and the complexity of the joints, and enhance the vitality of the new architectural form of the point-supporting glass. In this paper, the point support glass flexible support structure system is explored and studied, and the performance and characteristics of the flexible support structure system are studied. However, there are still a series of problems in design and construction, which need further research.
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