Membrane structure parking shed Use strong desire as the backing to achieve your dream, make it crazy, and make it the most important thing in your mind. I'm here to share new knowledge again! As a large-span membrane structure building, the stability of the membrane structure stand cannot be separated from the design, production and construction of the steel frame. In the production process of the steel frame, the on-site welding work is particularly important. It is the key to ensure the overall stability of the membrane structure stand, but welding deformation will always occur.
What is the reason for the welding deformation of the steel frame of the membrane structure parking shed? Let's briefly introduce the reasons for the welding deformation of the membrane structure stand steel frame. The welding stress and deformation are caused by the local and uneven heating of the weldment during the welding process. When welding, the weld and the metal in the heating zone near the weld expand. Because the surrounding cold metal prevents this expansion, compressive stress and plastic shrinkage deformation occur in the welding area, resulting in varying degrees of horizontal and longitudinal shrinkage.
The contraction of the membrane structure parking shed in these two directions has caused various deformations of the welding structure, and the factors affecting the welding deformation are as follows: weld cross-section: weld cross-section refers to the metal area within the fusion line. The larger the weld area, the greater the plastic deformation caused by the contraction during cooling. Welding heat input: generally, when the heat input is large, The large range of high temperature zone heated and slow cooling speed make the plastic deformation zone of the joint larger, which has an increasing effect on the longitudinal, transverse or angular deformation. However, when the heat input increases to a certain extent, the temperature of the whole plate thickness tends to approach, so even if the heat input continues to increase, the angular deformation will not increase, but will decrease.
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