A Method of Calculation of Stiffness Turning Time in Seismic Response Analysis of Multi-linear Single Degree of Freedom Systems

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  • Multi-linear型1自由度系の地震応答解析における剛性変化時刻の-算定法

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This paper deals with a method for the improvement of the accuracy of seismic energy response analysis of multi-linear single degree of freedom systems whose hysteretic characteristics of the restoring force is represented as a piecewise linear model. A technique to accurately obtain the turning time of the system stiffness without fail in seismic response analysis based on the Newmark's β method is proposed here. In this study, it was clear that the calculation time of the method proposed here was shorter than that of the conventional iterative method and also confirmed that the Trapezoidal formula was effective to accurately calculate the energy response of structures for strong earthquakes in the case that the time increment in numerical integral was relatively small.

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