杭配置に偏心を有する杭支持構造物の地震時ねじれ挙動に関する研究

概要

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In this study, centrifuge model tests have been carried out to evaluate the torsional behavior of pile-supported buildings with the eccentric distance between the center of gravity of the superstructure and the center of rigidity of the piles. Three models were considered; a 9-pile model without eccentricity, an 8-pile model which lacks a corner pile, and a 7-pile model which lacks two corner piles. It was found from the test that the maximum response of the torsional angle of a foundation increases in accordance with the eccentricity which is defined as the same method as the superstructure. The analysis was then carried out to simulate the result of the 7-pile model. In the analysis, a three-dimensional frame model was used, and soil around the piles was modeled as two directional horizontal axial elements and shear springs. A comparison between experimental and analytical results shows a possibility that this numerical model is capable of considering the dynamic torsional behavior of buildings supported by unsymmetrically arrayed piles.
社団法人日本建築学会の論文
2008-04-30