Testing prestress in structures is a key technical challenge

For the model of the floating head fastener considering contact, for the model of the countersunk fastener considering the contact, the geometrical nonlinearity is studied by the bearing performance of the glass plate with the metal fastener in the same glass building, and there is also a state nonlinearity, that is, local The tie rods and the cable may be loosened during the force and exit the work. The connection nodes of the prestressed members in the structure of the flexible support structure have special construction requirements, the application of the prestress must be ensured, and the prestress cannot be guaranteed to have a large loss. The form of the nodes also affects the aesthetics of the structure. Therefore, the node design is flexible. An important part of the design of the support structure system. In addition, the design should consider the particularity of materials, processing conditions, construction conditions, etc., to ensure the quality of structural design in terms of structural measures, and to reflect the characteristics of the point-supporting glass flexible support structure system.

In the construction of flexible support structure, the most important problem is the application of prestress. Usually, the post-tension method is adopted. How to grasp the applied value of prestress and how to detect the prestress value in the structure are all key technical problems. Continue research and practice. If a large prestress is applied, attention should also be paid to the influence of the prestress on the overall structure, and monitoring and control should be carried out in due course. After the flexible supporting structure system of the point supporting glass is put into use, it should be regularly monitored and maintained to ensure the connection of the prestressed members is fixed and the prestress loss is avoided. In special use conditions such as high winds, attention should be paid to the working condition of the structure to ensure its safety and normal operation, and to accumulate useful information for the performance study of the flexible support structure.

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