(14)地盤の大歪み領域における地盤・杭・建物連成系の地震時挙動評価に関する実験的研究

概要

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A series of shaking-table tests of a scaled soil-pile-building model were performed in order to study the effects of the plastic deformation of soil on dynamic characteristics of the soil-pile-building interaction system. Results show the natural frequency and the amplification factor decrease by 40% and 60%, respectively, when shear strain of soil is 4.2x10^<-2>. Dynamic response analyses, which combined the mass-spring model (SR model) having swaying and rocking spring and dash-pots located at the foundation of the building and an equivalent linearization method, were carried out. The difference in the natural frequency obtained by the test and analyses were within 18% and those of maximum acceleration at the building is within 12% when amplitude of input motion were 100 and 300 gal. The difference between test and analyses was caused by the difference in the damping effects of the rocking motion by the test and analyses.
一般社団法人日本建築学会の論文
1999-03-10