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膜材料的抗压和抗弯情况怎么样?
来源:http://www.sdcscp.com/ 发布时间:2022-03-09
膜结构材料就是氟塑料表面涂层与织物布基按照特定的工艺粘合在一起的薄膜结构材料。常用的氟素材料涂层有PTFE(聚四氟乙烯)、PVDF(聚偏氟乙烯)、PVC(聚氯乙烯)等。织物布基主要用聚酯长丝(涤纶PES)和玻璃纤维有两种。
Membrane structure material is a kind of membrane structure material that the fluoroplastic surface coating and the fabric base are bonded together according to a specific process. Commonly used fluorine material coatings include PTFE (polytetrafluoroethylene), PVDF (polyvinylidene fluoride), PVC (polyvinyl chloride), etc. The fabric base is mainly made of polyester filament (polyester PES) and glass fiber.
膜结构景观自己没有抗压和抗弯刚度,抗剪强主芤很差,因而其刚度和拘泥性必要靠膜曲面的曲率幻化和个中预应力来行进,对膜结构工程而言,任何时辰不存在无应力外形,因而膜曲面形状自满在定边界条件、定预应力条件下的力学平衡,并以此为基准停止荷载阐发和裁剪阐发。目前膜结构工程找形阐发的举措主要有能源松驰法、力密度法以及无量单位法等。
The membrane structure landscape itself has no compression and bending stiffness, and its shear strength is very poor. Therefore, its stiffness and stickiness must rely on the curvature illusion of the membrane surface and the prestress in it. For membrane structure engineering, there is no stress-free shape at any time, so the shape of the membrane surface is self-contained in the mechanical balance under the condition of fixed boundary conditions and fixed prestress, And take this as the basis to stop load analysis and cutting analysis. At present, the main methods of shape finding and analysis of membrane structure engineering are energy relaxation method, force density method and immeasurable unit method.
膜结构停车棚
膜结构材料的粘合就是将涂层与基材合二为一组成整体。建筑结构所用的膜结构材料大多是以压延成型和涂刮成型的。所谓压延成型,就是将选定的软PVC经塑炼后投入压延机,按照所需厚度、宽度压延成膜,立即与布基粘合,再经过轧花、冷却即可制得压延膜结构材料。
The adhesion of membrane structural materials is to combine the coating and substrate into a whole. Most of the membrane structure materials used in building structures are formed by calendering and scraping. The so-called calendering molding is to put the selected soft PVC into the calender after plastic refining, calender it into a film according to the required thickness and width, immediately bond it with the cloth base, and then make the calendering film structural material through embossing and cooling.
膜结构应定期清洗,清洗时应采用专用清洗剂。
The membrane structure shall be cleaned regularly with special cleaning agent.
每年雨季、冬季前应对膜面进行检查、清理,保持膜面排水系统畅通。雪荷载较大地区应有一定的融雪、排雪应急措施。
The membrane surface shall be inspected and cleaned before rainy season and winter every year to keep the membrane surface drainage system unblocked. Certain emergency measures for snow melting and snow drainage shall be taken in areas with large snow load.
应定期检查膜结构是否处于正常工作状态。主要检查项目包括:膜面有无较大变形,膜面是否因预张力损失而松弛,膜面是否局部撕裂,膜材涂层是否剥离等。
The membrane structure shall be checked regularly for normal operation. The main inspection items include: whether the film surface is greatly deformed, whether the film surface is relaxed due to pre tension loss, whether the film surface is partially torn, whether the film material coating is stripped, etc.
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