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A seismic damage investigation and analysis were conducted on the internal ceilings of public buildings in the 2023 Ms6.2 Jishishan earthquake. Three typical seismic damages, including the teaching building of Dahejia Middle School in Dahejia Town, Jishishan County, the outpatient building of Integrated Traditional Chinese and Western Medicine Hospital in Jishishan County, and the conference room of China Postal Bank in Jishishan County, were taken as examples to analyze the aluminum buckle plate ceilings that were less involved in previous investigations and study on typical seismic damage characteristics of aluminum buckle plate ceilings and indirect suspended ceilings, and some new seismic damage phenomena. Analysis suggests that aluminum buckle plates have sharp edges and corners, and the snap in connection requires a high level of flatness in the runner grid. If this type of ceiling is used in buildings with high seismic requirements or high personnel density, it is recommended to conduct specialized seismic analysis to avoid falling plates that may be harm to people or hinder their escape. In addition, in the assessment of seismic damage to suspended ceilings, in addition to the drop rate, factors such as deformation of the runner grid should also be considered. Furthermore, the reliability of the connection between the lighting units in the ceiling and the main structure should be strengthened to avoid a large number of falls during earthquakes. The analysis can provide reference for the seismic research and engineering application of suspended ceilings in public buildings.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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