中文摘要：

钢材锈蚀会引起结构的抗震性能与刚度的退化.通过已有钢材锈蚀规律并考虑结构的随机性,将IDA、Pushover与蒙特卡洛抽样结合得到结构概率地震需求及概率抗震能力的统计参数并代入本文提出的地震易损性模型,得到结构在不同极限状态的易损性曲面.以15层3跨钢框架为例,利用建立的方法研究了结构易损性随服役年限的变化规律.研究成果可为结构的全寿命设计、既有结构的运营以及地震风险评估等提供理论依据.

英文摘要：

Steel frames not only have the advantages of being light weight, and high strength but also are corrosion resistant and fireproof, so steel is widely used for industrial construction. Un- fortunately,research on corrosion mechanisms and measures of corrosion protection were mainly aimed at the timber level and based on experiments. Due to differences in test conditions, test methods and other factors, conclusions from these experiments were highly variable and empirical formulas were difficult to utilize. In addition, research aimed at component-level corrosion was al- so not yet clear, so uniform corrosion is often assumed for convenience. For example, some simply reported weakened cross-section members and considered material deterioration to analyze struc- tural performance. In this paper, we consider the seismic performance of overall structure in dif- ferent service times. Material deterioration and non-uniform corrosion were accounted for in col- umn and beam cross-sections. Steel corrosion caused the deterioration of seismic performance and stiffness for structures. When steel frame structures survive earthquakes, it does not guarantee that the structures will survive one that reaches the design capacity at a later service time. There- fore, when evaluating the seismic performance of steel frame structures in different service times, we must account for the increased seismic risks caused by steel corrosion over time. Changes in seismic performance of structures over different service times were examined in this paper. The deterioration of elastic formulas. At the same modulus and steel time, the thickness yield strength were evaluated using existing empirica variation of the column and beam cross-sections in stee frame structures was accounted for by using findings from related research. Different methods in- cluding IDA,pushover,and Monte Carlo were combined together to estimate values for different limit states in a probabilistic seismic capacity model. In this paper,the maximum drift angle was taken as