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The seismic safety evaluation of existing urban buildings （groups） is faced with multiple technical development of efficient analysis，rapid evaluation and quantitative determination. Considering the evolution of structural performance during the long-term service life，the safety evaluation of in-service buildings requires design and measurement information on the structures as well as regional ground motions to calibrate the real conditions of the structures，which can ensure the accuracy of the performance evaluation results within an acceptable timeliness. Based on the equivalent nonlinear single-degree-of-freedom model and the authors’ recent research on data-driven performance assessment index，this study proposes a method to map the global conditions of the structure with the measurement modal information and assess the seismic safety of the target building using the regional dataset of measured ground motion further. Based on the field testing and the HAZUS technical manual，the procedure of establishing the equivalent nonlinear single-degree-of-freedom representing the existing building is described. Two structural condition evaluation indicators are proposed，combined with multivariate engineering performance parameters，and the relationship between the deformation of an equivalent model and different seismic performance levels is further established. A high-rise regular RC frame structure located in Gongxian，Sichuan Province is considered as an example，the seismic safety of this building subjected to 10 local earthquakes measured from 2019 to 2022 is evaluated.
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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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