Selection and Calculation of Steel Structure Curtain Walls


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2017-01-04

  In the design of steel structure curtain walls, detailed structural drawings need to be produced based on factors such as the size, color, and material of the stone. Then, according to relevant design specifications, the seismic resistance, compressive resistance, and other relevant parameters of the relevant nodes need to be mechanically verified to ensure the safety and stability of the steel structure curtain wall application. Conventionally, the selection of stone should be based on the characteristics of the curtain wall indoors and outdoors. According to the elevation drawings and detailed drawings of each node, various parameters such as strength, water absorption rate, and seismic resistance level should be used for mechanical calculations to determine the selection of stone. Priority should be given to the characteristics, color, physical properties, and texture of stone products, while combining the curtain wall's grid form, construction cost, and design layout requirements to achieve the best overall design effect of the building.
 
  In the design of high-rise curtain walls, the mechanical performance calculation of the relevant nodes of the steel structure curtain wall needs to be combined with the structural method, connection method, material properties of the curtain wall design, and the requirements of national industry behavior standards to complete the mechanical calculation of the curtain wall system. This can be mainly divided into the following aspects:
 
  (1) Determination of the load. Usually, when determining the load, it is necessary to consider the self-weight of the stone, wind load, seismic load, and other load forms, maintain the effective transmission of structural loads. For uncertain loads, they can be determined based on national standard calculations and simulation tests.
 
  (2) Stone stress calculation. Before calculating the stress of the stone, it is necessary to determine the load form of the stone and the dry-hanging method of the stone, thereby determining the calculation model of the curtain wall, and calculating the bearing method and safety of the stone curtain wall. In addition, it is also necessary to analyze the stress of the stone itself, including the physical properties and various indicators of the stone, and complete the calculation according to the safety factor of different stone characteristics.
 
  (3) Verification of the bending and shear resistance of the stone. For anisotropic stone, the bending verification of the relevant plates of the curtain wall can be divided into two cases: First, the point where the maximum bending stress occurs in the stone plate has zero stress in another direction. As long as this maximum stress is less than the allowable stress of the stone in the corresponding direction, the bending resistance performance of the stone plate itself meets the requirements; otherwise, it does not meet the requirements. Second, the point where the maximum bending stress occurs in the stone plate has non-zero stress in another direction. Then, the verification should also consider this stress at the same time. At this time, the internal friction theory can be used for verification. When verifying the shear resistance of the stone, it is necessary to verify according to parameters such as the calculated thickness and hole depth of the stone.