ON PERFORMANCE BASED DESIGN METHOD FOR SYSTEMS WITH NON-LINEAR VISCOUS DAMPER AND ELASTO-PLASTIC DAMPER

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  • 非線形粘性ダンパーと弾塑性ダンパーを併用した系の応答性能設計手法
  • ヒセンケイ ネンセイ ダンパー ト ダンソセイ ダンパー オ ヘイヨウシタケイ ノ オウトウ セイノウ セッケイ シュホウ

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Abstract

This paper presents a performance based design method which is able to estimate the energies of the structures with bilinear typed viscous dampers and bilinear elasto-plastic dampers by means of separated variables; that is, an equivalent energy spectrum for given ground motions is expressed in terms of the product of an elastic spectrum _pS_<v,40>(TE) and empirical formulas of viscous damping ratio h_o, bilinear relief velocity ratio (=maximum response velocity/relief velocity) μ_v, second viscous coefficient ratio P_v, ductility factor μ_d, and bilinear stiffness factor P_d The desigh diagrams are also proposed by making use of the empirical formulas. Thus, design parameters of dampers can be easily evaluated, if a designer specifies the values of h_o,μ_v,p_v,μ_d and p_d for the design spectrum of a ground motion. The paper shows also good agreements between the estimated design values and the results computed by non linear time history analysis.

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