The film surface is damaged. Here, there are two situations: structural damage and material damage. The former mainly refers to the occurrence of cracks on the membrane surface, inability to effectively drain water, or the occurrence of wrinkles. The latter mainly shows that the coating on the film surface starts to fall off, the surface is not easy to clean, and the coating has signs of aging.

二是节点受到了损坏。膜结构其实是有很多的部件组成的，在这其中，节点可以算作是比较脆弱的部分了。因为一个膜结构建筑需要和其它材料如钢索等结合在一起，而在这其中起作用的主要就是节点，本来在连接的时候膜材就会受到伤害，再加上在连接过程中容易出现应力过度集中等情况，这一部分就变成了较易受伤的位置。除此之外，在遇到一些恶劣天气如暴雨、暴雪的时候，节点处还会出现漏雨等情况。这些都对建筑的正常使用产生了负面影响。

The second is that the node is damaged. Membrane structures are actually composed of many components, in which nodes can be considered as relatively fragile parts. Because a membrane structure building needs to be combined with other materials, such as steel cables, and the main function in this is the node. The membrane material would have been damaged during the connection process, coupled with situations such as excessive stress concentration during the connection process, this part becomes a relatively vulnerable location. In addition, when encountering some severe weather, such as rainstorm and heavy snow, there will be leakage at the nodes. These have had a negative impact on the normal use of buildings.

三是膜结构的整体都遭到破坏。这种情况出现的少，一般都是多种因素共同作用的结果，而且往往伴有突然性特点，比如在遇到极恶劣天气的时候、膜面、节点受损害并遭遇外界环境影响的时候。

Thirdly, the entire membrane structure was damaged. This situation occurs infrequently, usually as a result of the combined action of multiple factors, and is often accompanied by sudden characteristics, such as when encountering extreme weather, membrane surface, node damage, and external environmental impact.

四是其它的损坏形式。这主要是指在安装过程中就已经出现了的损伤，比如安装不当之后采取的补救措施对于建筑本身造成了一定影响，或是裁剪不到位造成膜面无法张拉等。

Fourth, other forms of damage. This mainly refers to damage that has occurred during the installation process, such as the remedial measures taken after improper installation that have had a certain impact on the building itself, or the inability to tension the membrane surface due to improper cutting.

因此总的来看，造成运城膜结构自行车棚被破坏的因素主要有两个，一是外界环境的恶化，二是在制作时就存在缺陷。按照其破坏的程度，我们应该采取修复或是重建的解决措施。

Therefore, in general, there are two main factors that cause the destruction of the Yuncheng membrane structure bicycle shed. One is the deterioration of the external environment, and the other is the existence of defects during production. According to the extent of its damage, we should take measures to repair or rebuild it.