多層スリップ型架構に粘弾性ダンパーを用いた制振構造の応答制御設計法

摘要

Vicso-elastic dampers are increasingly used to reduce earthquake-induced vibration of building structures, including wood house structures which show slip hysteresis under earthquake loading. In this paper, simplified theories are proposed for seismic response evaluation and preliminary design of slip-hysteretic structures combined with visco-elastic dampers. They are based on the single-degree-of-freedom (SDOF) idealization of multistory structure, and produce the control performance curve expressing the peak responses as a function of stiffness of all components, based on spectral characteristics of the earthquake. Against the target peak response, a rule to convert the SDOF design to multistory design, with consideration to distribute damper stiffness over the height of structure, is also presented. Accuracy of the approach is demonstrated by time history simulations over a wide range of parameters.%地震人力に対して弾塑性スリップ型の履歴を示す建築構造は、エrnネルギー吸収能力が低いため大きな変形が生じ易く、よって建物のrn損傷制御の面で不利であると認識されている。rnしかし、比較的小規模の建物では、材料や部材の制約から、そのrnような履歴特性がよくみられる。木質住宅では、木材の柔らかさのrnため、釘穴の緩みなどによる接合部の局所変形がおこり、スリップrn型の履歴を示す。