基于概率烈度的结构抗震损伤可靠性分析

基于结构在地震作用下的不同程度损伤,探讨了更为准确、实用的抗震可靠性分析方法。以混凝土多孔砖砌体结构为例,采用抗震损伤指标标定结构在地震作用下的损伤状态等级,将结构损伤状态分级化;考虑抗震设防区实际地震烈度的发生概率,引入概率烈度来改进传统的可靠度计算公式,构建了基于概率烈度的结构抗震损伤可靠性分析方法。实现结构抗震损伤状态及其概率的分级量化评价,为进一步结构抗震研究及抗震风险评估提供分析基础。

Structure Seismic Damage Reliability Analysis Based on Probabilistic Seismic Intensity

In this paper a more accurate,practical seismic reliability analysis method is studied based on the structure varying seismic damage degrees.Concrete perforated brick masonry was taken as the example and the seismic damage index were used to demarcate structure damage state levels.At the same time,structure damage state was tiered.Actual seismic intensity probability in the earthquake zone was considered,and the probabilistic seismic intensity was induced for improvement the traditional reliability formula.A structure seismic damage reliability analysis method was built basing on the probabilistic seismic intensity.Grading quantitative evaluation for structure seismic damage state and its probability was achieved.It is helpful to provide direct work basis for further structure seismic study and seismic risk assessment.