SEISMIC DESIGN METHOD BASED ON SPECTRUM CAPACITY PROCEDURE FOR TIMBER SEMI-RIGID FRAME WITH OIL DAMPER

Abstract

 This research is about equivalent linearization method based on calculation of response and limit strength for SDOF model of timber structure with oil damper installed on the slip type main frame. By integrating many literatures, the evaluation of oil damper effects in vibration control design by extended limit strength calculation method is shown. By comparing with numerical analysis and full scale shaking table experiments the accuracy has been verified. The results are summarized below.

 

 ・Complying to “Manual for Design and Construction of Passively-Controlled Buildings” etc., refer to what current calculation of response and limit strength can do to evaluate the effect of oil damper on ”Seismic Isolated Building”, by replacing Maxwell model with equivalent Voigt Model, the extended method is considered and shown.（Extended Limit Strength Calculation Method）

 

 ・By assigning each element specification value as a parameter, time history response analysis of SDOF model of timber structure with inelastic-bilinear type of oil damper installed in the slip type main structure was performed. By comparing the analysis result with the result of extended limit strength calculation method, the overall response trend can almost be predicted, but in case the additional damping of damper is large, the decrease of accuracy, and the variation of predicted value due to the difference of the rigidity of the support material was confirmed.

 

 ・As a result of improving the accuracy of extended limit strength calculation method based on the previous research results by Kasai et al., the improvement of overall result accuracy and the reduction of variation was confirmed. (Kasai Extended Limit Strength Calculation Method)

 

 ・By comparing shaking table experiment of 1 story timber frame structure result with response prediction value from Extended Limit Strength Calculation Kasai Extended Limit Strength Calculation Method, the correspondence of experimental values and the predicted values of various input levels (level 1 to level 3) was confirmed.