| Popis: |
It is important to estimate the required cumulative plastic deformation of members against strong earthquake for seismic design. The conventional model which has been generally used for seismic response analysis is equivalent multi-mass shear vibration system. The collapse mode of steel structure can not be predicted in a strict sense with this system, because the strength and stiffness ratios of the column and the beam are not estimated by the model. On the other hand, multistory planar frame model is not undesirable for practical use, because too much effort, such as design of the frame and analysis to carry out parametric study, is needed. This paper proposes the formulation of modeling of the multistory planar moment resistant frame to fishbone-shaped frame, which can predict the collapse mode, and cumulative plastic deformation of member for the seismic response analysis. And the propriety of the modeling is presented by numerical examples. |
