STUDY ON A SIMPLIFIED MODEL OF A HIGH-RISE SHEAR-TYPE BUILDING FOR EVALUATION OF Q–Δ RESONANCE

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  • ANAMIZU Ryosuke
    Former School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University
  • KOHIYAMA Masayuki
    Dept. of System Design Engineering, Faculty of Science and Technology, Keio University

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Other Title
  • せん断型超高層建物のQ–Δ共振評価用簡易モデルに関する研究

Abstract

<p>To evaluate Q–Δ resonance, which is a torsional resonance phenomenon caused by geometric non-linearity, we proposed a simplified model for an n-story non-eccentric building model with a shear-type structure. We designed and fabricated a four-story small-scale specimen assuming a non-eccentric steel structure with a height of 324 m, and conducted shaking table tests. As a result, the occurrence of Q–Δ resonance was confirmed as predicted by the simplified model. In addition, the simplified model reproduced the resonance amplitude in a finite element model of the specimen with the out-of-plane rotation of slabs constrained and its validity was confirmed.</p>

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