地震動による構造物へのエネルギー入力の統計量予測に関する基礎的考察

概要

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The work done by the seismic load acting on a structure, namely the energy input, is an important quantity, which can be directly compared to the energy dissipation capacity of the structure. This paper presents a simple method to estimate the statistical parameters of the energy input from the stochastic model parameters of the ground acceleration. The method is based on a frequency-domain relationship between the energy input and the Fourier square amplitude spectrum of the ground acceleration, eq. (8). First the mean and the coefficient of variation formulas of the enrgy input to viscously damped linear single-degree-of -freedom system under classical stochastic models of earthquakes are obtained, as shown on Tables 1 and 2. The it is shown that the formulas are also applicable to elastic-plastic system with the availability of a simple equivalent-linearization technique. This provides a practical means to evaluate the reliability of a hysteretic structure, which has some limits on its energy dissipation capacity.
社団法人日本建築学会の論文
1985-01-30