非平稳地震作用下MSCSS动力可靠度分析及优化

Dynamic reliability analysis and optimization of mega-sub controlled structure system under non-stationary seismic action

基于巨子型有控结构体系(Mega-sub controlled structure system,即MSCSS)的组装原理,从抗震设防的角度提出了"有区别的等可靠度优化准则"。采用Hilbert-Huang变换(HHT)法合成非平稳人工地震波,将基于概率密度演化理论的动力可靠度分析方法用于MSCSS,编制了MATLAB与SAP2000的接口程序,以所提出的优化准则对非平稳地震作用下MSCSS进行了尺寸优化,并比较了优化前后的结果。研究表明:对MSCSS进行优化是有必要的,MSCSS优化后的可靠度分布比优化前更为合理,且响应控制能力也得到了提高。

Based on assembly principle of mega-sub controlled structure system （MSCSS）, ＂the distinguishing equal-reliability optimization criterion＂ was put forward from the point of view of seismic fortification. Used the Hilbert - Huang transform （HHT） method to synthesis non-stationary artificial seismic wave, the dynamic reliability analysis method based on the probability density evolution theory was used to MSCSS, established the interface program of MATLAB and SAP2000, the size optimization with the proposed optimization criterion was executed to MSCSS under non-stationary seismic action, and compared the results before and after optimization. The research shows that the MSCSS optimization is necessary, the reliability distribution of MSCSS after optimization is more reasonable than before, and response control ability is also improved.