観測雑音を考慮した立体構造物振動特性の推定

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To evaluate the dynamical properties of the building frame is one of the fundamental demands in the aseismatic design procedure. The reliability of the aseismatic structural design would be established under the condition that the dynamical properties, especially the stiffness matrix and the damping matrix in the vibration model of the building are suitably evaluated. Whether the assumed dynamical properties of a building frame in the designing stage are relevant or not, ought to be verified by the dynamical properties estimated from the observations of dynamic behaviors, during earthquake motions, of the building after construction. Usually, the damping factors of the building are estimated by the forced vibration experiments using the vibration generator and the stiffness of the building is evaluated from the numerical calculations on the basis of actual sizes of members. By this conventional method, however, it is difficult to estimate the damping factors of higher order and the stiffness of the frame having secondary structural elements such as wing walls. In this paper, the equation of motion describing the three dimensional dynamical behavior of the building frame with braces or shear walls are proposed, then the improved least-squares method for estimating the stiffness matrix and the damping matrix from the noisy observations of floor motions of the building subjected to the arbitrary ground motions is proposed. The numerical results of several simulations suggest that this estimation method may sufficiently estimate the dynamical properties of the buildings by using the observed data corrupted with Gaussian white noise.
社団法人日本建築学会の論文
1983-12-30

観測雑音を考慮した立体構造物振動特性の推定

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