Membrane structure parking shed The material is a kind of high strength and soft fabric with high tensile strength and certain tear resistance, but its in-plane compressive and bending strength is almost zero, and its shear strength is also very low, and it has certain anisotropy and several nonlinear properties of the material, which is easy to produce stress relaxation and creep when used

In practical engineering applications, with the different types of membrane data for membrane structures, the prestress in the membrane is generally 1~8kN/m. Even under adverse load conditions, the stress value in the membrane is only 1/4~1/8 of its tensile strength. For simple planning and accounting, the membrane data can generally be assumed to be orthotropic linear elastic data, which can be known from the theory of elastic mechanics, Constitutive relation of plane stress orthotropic elastic data.

One kind of membrane material used in membrane structure is the membrane material with high strength and good flexibility. The fabric base material is divided into polyester fiber and glass fiber. The resins used as coating materials are polyvinyl chloride resin (PVC), silicone and polytetrafluoroethylene resin (PTFE), which are light, light, light and transparent; Ability to reflect, absorb and transmit natural light; It is nonflammable, nonflammable or flame retardant; It has the characteristics of durability, fire resistance, airtight color, etc; The membrane material with the surface treated with fluorine (coated with PVF or PVDF) has the advantages of non tackiness and good self-cleaning function. Membrane structure landscape

The membrane structure inflatable membrane structure fixes the membrane data on the roof, can use the air supply system to raise the indoor air pressure, use the pressure to hold the certificate, do not need any auxiliary props to support, can get a large space for use, its construction is easy, the power is relatively high, and its cost is relatively small, so it is necessary to pay attention to the air supply system to carry out 24-hour air supply.

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