高粘性ダンパに関する研究 : 粘弾性モデル化と設計手法の提案

抄録

Dampers using viscosity resistance of highly viscous materials are already been in practical use as seismic devices for multispan continuous bridges and buildings, thus making rationalized earth-quake-resistance design possible. The viscous shearing damper generates no hydraulic pressure. On the other hand, as the viscosity of viscous material becomes higher, considerable non-Newtonian character and viscoelastic behaviour appear. Dynamic characteristics of a viscous shearing damper and dynamical models of viscoelasticity of highly viscous material (SA-P) using mainly polyisobutylene and other polymer substances were examined by means of a spectrometer and dynamic actuator. A general empirical formula on viscous shear resistance and modelling of viscoelasticity by introduction of the Maxwell model with nonlinear elements were proposed.