Membrane structure, also known as the fabric structure, is a new construction form developed in the middle of 20th Century. High strength membrane material combining together with joining components create pre-tension within the archetecture, so as to form an overlay structure that can withstand certain heavy load.
The pressure control system inflates the interior of the building, to maintain a certain pressure difference between the inside and outside . The indoor automatic regulation system adjusts the air pressure, in order to adapt to changes in the external load. No support is needed in the span, so it is perfect for large-span buildings, especially large-scale stadiums.
The membrane surface is generally negative Gauss surface. Natural and smooth surface makes it easier to form unique architectural design. However, it requires complex stress analysis and high precision. Most suitable for medium and small span buildings, or stand canopy and roofing structure.
Self-enclosed, steady skeleton system and membrane material form a structural system. The construction system resembles conventional structures, which is more likely to be accepted in engineering field. Can be used in large, medium, small public sports venues.
膜材料优势 Why Choose Membrane Structure Construction
高强 High Intensity
Membrane material is composed of two parts: substrate and coating. Substrate mainly adopts high polyester, with plain-weaving or inter-weaving methods. Different substrate material and weaving method differ warp and weft mechanical properties of membrane materials, tensile intensity and tearing intensity. Coating materials are mainly PTFE and PVC, improving the performance of membrane materials to a certain extent, namely durability, self-cleaning properties, with a layer of fluoride or silicon surface layer, the membrane excels in fire retardancy, durablity and waterproof, self-cleaning properties.
阻燃 Fire Retardancy
Membrane material is perfect fire retardant and has the excellence of smoldering and high temperature resistance, reaching the standard of ASTMZ-136, which has been registered in California City Fire Department, and has reached standards of the UK, France, Italy, Japan, Australia, Germany and other countries. PTFE membrane material can reach a standard of A (non flammable), and ETFE can reach the standard of A2.
Commonly the sunlight transmittance of membrane material is between 12% and 25%, ETFE 30--90%, which enables full use of natural light. No artificial lighting is needed during daytime. Translucency makes for the building's majestic appearance in the long dark night. In addition, the membrane material can also filter part of the UV light, suitable for indoor plants.
Traditional PVC membrane material is likely to precipate under high temperature and UV light, because of its molecular instability. Therefore, a layer of PVF or PVDF SiO2 can effectively improve its self-cleanse. While PTFE and ETFE membrane materials of higher cost won't precipate Due to their extreme molecular stability,thus own excellent self-cleaning properties and need not to add any coating materials. The incombustible (class A1) performance is widely used in permanent buildings. PTFE and ETFE films are the basic materials used in large space buildings.
Usually the membrane structure is located in the urban area, people do not want external noise to interfere the room, as well as indoor voice to spread out, therefore put forward higher requirements on the construction noise. Insulation of single layer membrane is only about 10dB, but with ingenious design, construction and other means the sound insulation performance could be improved, fully meet the needs of human beings.
隔热 Heat insulation
PVDF and PTFE can reflect more than 70% light on its optical surface, allowing 12--25% to transmit. This could reduce heat absorption to the minimum. Compared with the traditional glass, the heat transfer rate is greatly reduced, heat insulation performance is better than glass, which reduce lighting costs and air-conditioning cost in summer.
抗温变Changing Temperature Resistance
PTFE uses a layer of glass fiber as substrate, whose intensity reaches 5000000 pounds per square inch and 10.5 × 106 modulus of elasticity. During use, chemical change rarely takes place on the surface coating, and can endure temperature changes from -73 to 232 degrees. The United States of California LAVERNE university student activity center built in 1973 is tensioned membrane structure. When tested and tracked of material loading and accelerate climate change experiments, it proves to function well even after 40 years.
7 Reasons for Choosing Membrane Structure Construction
Reason 1: High Intensity
Reason 2: Fire Retardancy
Reason 3: Translucency
Reason 4: Self-Cleanse
Reason 5: Sound-Proof
Reason 6: Heat Insulation
Reason 7: Changing Temperature Resistance