膜結構停車棚應當如何維護才能延長使用壽命?
在安裝膜結構停車棚時就應該根據膜結構現場的環境來選擇防腐措施和防腐材料,并按時進行檢查支承結構,索、夾板和螺栓連接等地方的防腐情況。如果有腐蝕的情況發生,先要除去防腐層,然后重新做好表面的防腐處理。
When installing a membrane structure parking shed, anti-corrosion measures and materials should be selected according to the environment of the membrane structure site, and the anti-corrosion situation of the supporting structure, cables, clamps, and bolt connections should be checked on time. If corrosion occurs, the anti-corrosion layer should be removed first, and then the surface anti-corrosion treatment should be carried out again.
膜面清潔:很多人覺著及時清理膜面上的五污垢可以延長膜材的常規使用的壽命,但真實的情況是,大多數的膜材表面并不需要人為清洗。在膜結構停車棚設計之初,膜材的自潔性和膜面的形狀都已經被設計為較難堆積污垢的樣子,如果清洗方式不當,還會縮短其使用壽命。
Membrane surface cleaning: Many people believe that timely cleaning of the five dirt on the membrane surface can extend the normal service life of the membrane material, but the reality is that most membrane surfaces do not require manual cleaning. At the beginning of the design of the membrane structure parking shed, the self-cleaning properties of the membrane material and the shape of the membrane surface were already designed to be difficult to accumulate dirt. If the cleaning method is not appropriate, it can also shorten its service life.
膜面修補:在安裝過程中會無意或有意的造成膜面出現較小的損傷,此時能夠直接進行現場修補。投入到正常的使用中之后應該對基層纖維布和涂層進行按時進行檢查,對于小的裂口小洞可以直接在膜面外側加焊補丁予以修復,補丁必須要圓角處理,應將焊接面的塵土、油漬和油脂進行清理。
Membrane surface repair: Minor damage to the membrane surface may occur unintentionally or intentionally during installation, in which case on-site repair can be carried out directly. After being put into normal use, the base fiber cloth and coating should be inspected on time. For small cracks and holes, welding patches can be directly added to the outside of the film surface for repair. The patches must be rounded and the dust, oil stains, and grease on the welding surface should be cleaned.
膜材替換:應在膜結構的整個使用期內保留所有的加工圖,這樣可使膜的替換工作變得格外的簡單,只需對采用的新膜材重新進行試驗以確定其補償值即可進行替換施工。如果原幅寬的膜材缺貨,則需要重新進行裁剪設計。也可能需要根據現有支承結構的具體尺寸重新進行結構找形。
Membrane material replacement: All processing drawings should be retained throughout the entire service life of the membrane structure, which can make the membrane replacement work particularly simple. Simply retest the new membrane material used to determine its compensation value for replacement construction. If the original width of the film material is out of stock, a new cutting design is required. It may also be necessary to redesign the structure based on the specific dimensions of the existing supporting structure.
積水和排水:如果膜結構停車棚產生積水,必須要立即積水或積雪。如果雨雪天氣持續不斷,積水會使膜材遭到破壞,故要對公眾關閉膜面覆蓋的空間,并立刻采取措施避免新的積水。由于荷載作用下的膜結構會產生變形,膜面坡度較小處可能會有積水。
Water accumulation and drainage: If there is water accumulation in the membrane structure parking shed, it must be immediately cleared of water or snow. If the rainy and snowy weather continues, water accumulation will damage the membrane material. Therefore, it is necessary to close the space covered by the membrane to the public and take immediate measures to avoid new water accumulation. Due to the deformation of the membrane structure under load, there may be water accumulation at areas with smaller membrane surface slopes.
預張力和二次張拉:膜結構的穩定依賴于膜結構內的預應力的保持,預應力的水平影響膜在荷載作用下的變形。因為膜結構在荷載的持續作用下會產生松弛,所以在使用期間膜內預應力會發生明顯的變化。用于特定結構在荷載的持續作用下會產生松弛,所以在使用期間膜內預應力會發生明顯的變化。用于特定結構的膜材性能能夠終靠雙軸實驗來確定,并應用于預應力設計中。
Pre tension and secondary tension: The stability of membrane structures depends on the maintenance of prestress within the membrane structure, and the level of prestress affects the deformation of the membrane under load. Due to the continuous action of loads, membrane structures will experience relaxation, resulting in significant changes in prestress within the membrane during use. Under the continuous action of load, a specific structure will experience relaxation, so the prestress inside the membrane will undergo significant changes during use. The performance of membrane materials used for specific structures can ultimately be determined through biaxial experiments and applied in prestressing design.
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