Research on the Evaluation Method for Key Buildings Based on Seismic Damage Index Modification—Taking the Yangzonghai Area Seismic Fortification Planning of Kunming City as an Example

Abstract

This article focuses on the evaluation of key buildings in seismic mitigation planning, based on the modified seismic damage index. In the evaluation process, a computational model for key building evaluation is proposed, including the coefficients for model modification. The weights of the model modification coefficients are quantitatively calculated, followed by the application of the model for evaluation and conclusion derivation. Taking the "Yangzonghai Regional Seismic Design Planning" as an example, in the key building evaluation section of the specific mitigation planning, the average seismic damage index of group buildings in Yunnan Province's zone of VIII degree is used as the basis for calculation. The average seismic damage index of group buildings is adjusted with weighted factors such as building structure, construction year, site type, compliance with regulations, and adoption of seismic isolation technology. The factors are further adjusted using expert scoring. Finally, the seismic damage index for each important building is calculated. By referring to the corresponding building damage level associated with the seismic damage index, the potential damage levels that each important building may experience during a seismic event of the designated design level are determined. This study provides preliminary guidance for the renovation and improvement of important buildings and serves as an initial reference for decision-making by relevant government departments.