抗震结构时程可靠度的遗传模拟退火算法

针对抗震结构时程可靠度分析中功能函数为非线性程度较高的隐式函数的特点，将遗传模拟退火算法与时程分析法相结合，建立了抗震结构时程可靠度分析的遗传模拟退火算法．该算法可以充分考虑结构参数和地震动的双重随机性，可确定任意时刻结构的时程可靠指标．用此方法及Monte Callo法分析了分别受大震和小震作用的三质点钢筋混凝土结构的时程可靠度，结果表明了该方法的有效性．

Genetic Simulated Annealing Algorithm for Time-History Reliability of Aseismatic Structures

To analyze the time-history reliability of aseismatic structures, an algorithm based on the genetic simulated annealing and time-history methods was proposed on the basis of the characteristic of structural performance functions for the time-history reliability of aseismatic structures, i.e. they are implicit functions with strong non-linearity. This algorithm can reflect the randomness of structural parameters and earthquake motions and the effects of an earthquake action and static loads. Furthermore, time-history reliability index of aseismatic structures at any time in the process of an earthquake can be got by using the algorithm. As an example, the time-history reliability of story-drift capacity for a three-story reinforced concrete (RC) frame respectively under frequent and strong earthquakes was analyzed using the algorithm and the Monte Carlo method, and the result shows the effectiveness of the algorithm.