有限共振原理に基づく偏心構造物の極限応答解析 : II一軸偏心の場合のパラメトリック応答解析

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This paper has performed a parametric study on the lateral-torsional response of inelastic single- story asymmetric building structures comprising bilinear hysteretic elements by using MODE-SEPARATING RESPONSE ANALYSIS METHOD BASED ON FINITE RESONANCE PRINCIPLE in the part 1 of this research. In this paper, the following terms have been considered as the system parameters : 1) eccentricity ratio 2) aspect ratio 3) initial elastic period 4) initial base shear coefficient Then, the effects of the system parameters on the lateral-torsional response have been examined through the parametric study. The results have been produced interesting conclusions among which the followings are important for earthquake resistant design of building structures with eccentricity in strength as well as stiffness. 1) The results are compared with those obtained by Runge-Kutta's numerical integration method, and confirmed good coincidence between them within the entire period domain. 2) The lateral displacement of the center of mass does not vary with changing the eccentricity ratios at all for the system having small aspect ratios, but increases some what with increasing the eccentricity ratios for the system having large aspect ratios despite of the case of long natural periods. 3) The torsional displacement of the system increases almost linearly with increasing the eccentricity ratios for the system having small aspect ratios, but not linearly for the system havinglarge aspect ratios. 4) The peak ductility demand of the element located on the weak stiffedge in the eccentrical direction increases with increase in eccentricity ratios within the almost entire period domain. And the increase of the peak ductility demand is mainly caused by increase of the torsional displacement. 5) The system shows somewhat constant in the total plastic energy absorbed in an eccentrical buildinga despite of changing eccentricy and aspect ratio.
社団法人日本建築学会の論文
1990-04-30

有限共振原理に基づく偏心構造物の極限応答解析 : II一軸偏心の場合のパラメトリック応答解析

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