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発表 EXPERIMENTAL STUDIES OF RATE-DEPENDENT MECHANICAL BEHAVlOR OF LAMINATED RUBBER BEARINGS

作成年度 2009年度
論文名 EXPERIMENTAL STUDIES OF RATE-DEPENDENT MECHANICAL BEHAVlOR OF LAMINATED RUBBER BEARINGS
論文名(和訳)
論文副題
発表会 7th CUEE and 5th ICEE Joint Conference
誌名(No./号数) JOINT CONFERENCE PROCEEDINGS
発表年月日 2010/03/03 ~ 2010/03/05
所属研究室/機関名 著者名(英名)
ゴム支承協会今井 隆(IMAI Takashi)
チッタゴン工科大学A.R. Bhuiyan
埼玉大学M.K. Razzaq
埼玉大学奥井 義昭
寒地構造チーム三田村 浩(MITAMURA Hiroshi)
抄録
The paper is devoted towards an experimental investigation of the rate-dependent mechanical behavior of the laminated rubber bearings under horizontal shear deformation with a constant vertical compressive load. Three types of bearings are used in this study: natural rubber bearings (RBs)、 lead rubber bearings (LRBs) and high damping rubber bearings (HDRBs) with ISO standard geometry. The experimental scheme is comprised of three types of test at room temperature(23±1℃): cyclic shear (CS) test、 multi-step relaxation (MRS) test、 and simple relaxation (SR) test. The purpose of conducting the CS test is to identify the instantaneous behavior of the bearings、 the SR test、 to evaluate the viscosity induced rate-dependent behavior、 and finally the MRS test、 to obtain the equilibrium behavior. Moreover、 a series of sinusoidal loading tests (at 0.5 Hz) are carried out at different temperatures ranging from 23℃ to -30℃. The objective of conducting the simusoidal loading tests is to identify the basic mechanicl characteristics of the bearings at different temperatures: the equivalent stiffness and damping of the bearings. The experimental results show that the viscosity induced rate-behavior is more prominent in the HDR than the LRB and the RB. The viscosity induced rate-dependent behavior of the bearings is more significantly appeared in loading than in unloading. However、 this typical behavior is not so significant in the RB as in the other two bearings. Furthermore、 the temperature dependency is more remarkably emerged in the HDR and the RB than the LRB.
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