基于可靠度分析的巨子型有控制结构体系附加阻尼器布置方案研究

基于无附加阻尼器巨子型有控结构体系(Mega-Sub Controlled Structure System,即MSCSS)在地震作用下的弹塑性时程分析,从不同角度给出了不同的附加阻尼器布置方案。采用Hilbert-Huang变换(HHT)法获得实测地震波的渐进功率谱,运用非平稳三角级数法获得多条人工波,并选取多条反应谱相近的人工波作为随机过程的样本库,将基于概率密度演化方程的可靠度分析方法用于不同附加阻尼器布置方案下的MSCSS,并与巨型框架结构进行了比较。研究表明:MSCSS的可靠度优于巨型框架结构很多,附加阻尼器布置方案对MSCSS的可靠度影响很大,将附加阻尼器分别布置在子结构层间位移最大层和位移最大层时MSCSS的抗震性能最好。

STUDY OF ARRANGING SCHEMES OF THE DAMPERS INSERTED IN MSCSS BASED ON RELIABILITY ANALYSIS

Based on elastic-plastic time-history analysis of the MSCSS without additional dampers under seismic action,it was given that different arranging schemes of the additional dampers from different angles.The HilbertHuang transform method(HHT) was used to obtain the progressive power spectrum of measured seismic wave,the non-stationary trigonometric series method was used to obtain a plurality of artificial waves,and multiple artificial waves with similar response spectrum were selected as the sample library of a random process,the reliability analysis method based on the probability density evolution equation was used to MSCSS under different arranging schemes of additional dampers,which was compared with the mega frame structure.Research shows that reliability of MSCSS is much better than mega frame structure,arranging schemes of the additional dampers have great impact on reliability of the MSCSS,the performance of MSCSS is the best when additional dampers are arranged in the maximum story drift layer and the maximum displacement layer of sub-structure respectively.