確率部分空間法による基礎固定系建物の振動特性同定法

抄録

A two-step system identification is presented to estimate modal properties of a base-fixed model from ambient vibration records on a multi-story building with soil-structure interaction (SSI). In the first step the output-only identification of the stochastic subspace method is employed for estimating modal properties with SSI. In the second step the modal properties of the base-fixed model are modified from the first estimates, by using theoretical relations between the multi-degree-of-freedom model with SSI and its equivalent base-fixed model derived in the paper. Two examples in numerical and real-world tests are demonstrated to show applicability in the two-step system identification.