常時微動計測・強震観測に基づく動的相互作用効果の階数依存性に関する研究 : S造及びSRC造10階建物の建設段階毎の動特性の変化

概要

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In order to estimate the effects of Soil-Structure Interaction (SSI) dependent on the number of stories, the structural system, and the foundation, microtremor observations were carried out during the construction of a 10-story steel (S) building & a 10-story steel reinforced concrete (SRC) building. Earthquake response observations were also carried out during construction of the S-building, in order to compare between responses during earthquake and those during microtremor. The effects of SSI on natural frequency and damping factor are strong for the buildings when the number of stories is low, but the effects become weak when the number of stories is increased. A dependence on the number of stories is not clearly obtained in the effective input motion. The results for microtremor & earthquake response observations are nearly the same. After completion, the different structural systems and foundations exhibit very different earthquake response, even though the soil conditions for the two buildings are nearly the same.
2002-03-20