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The Development of Laminated Rubber Bearings Applicable to the Base Isolation of Light Weight Wooden Houses

适用于轻型木结构房屋基础隔震的层压橡胶支座的研制

基本信息

批准号：
14550583
负责人：
NISHIMURA Isao
金额：
$ 1.98万
依托单位：
Musashi Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

The goal of this research project was to improve the stability of laminated rubber bearings to the extent that they could support such lightweight structures as wooden houses that are base isolated from the ground motion in case of a large earthquake.In the early phase of this research project, emphasis was placed on the analytical study to clarify the shear, bending, and axial stiffness associated with hollow circular rubber bearings that were used for this purpose. The aim of the experimental studies was to validate the analytical prediction and evaluate the precision of the obtained formulas.The coherence between the analytical and experimental studies for the hollow circular rubber bearings was the basis on which the buckling tests in the next phase were conducted and their post-analytical studies were also carried out. As a result of those sequential tests and analyses, the author successfully constituted a geometrically nonlinear model that could well describe the post buckling behavior of test specimens.The author proved that the deferential equation of the buckling model was identical to the nonlinear vibration model for a pendulum with large amplitude. Therefore, the solution for the model is expressed in terms of Jacobi's elliptic integrals.This model revealed that there is a required condition that certifies the post-buckling stability of the shear-bending columns in general. This theoretical finding leads to the invention that has a superb post-buckling stability that will satisfy the goal of this research project.

本研究的目的是提高叠层橡胶支座的稳定性，使其能够在大地震时支撑木结构房屋等基础隔震的轻型结构。在本研究项目的早期阶段，重点是分析研究，以阐明剪切、弯曲、以及与用于此目的的中空圆形橡胶支座相关的轴向刚度。试验研究的目的是验证分析预测的正确性和评估公式的精度，分析和试验研究的一致性是进行下一阶段屈曲试验和分析后研究的基础。通过试验和分析，作者成功地建立了一个能较好地描述试件屈曲后行为的几何非线性模型，并证明了该模型的微分方程与大振幅摆的非线性振动模型是一致的。因此，该模型的解用Jacobi椭圆积分表示，该模型揭示了剪弯柱屈曲后稳定性一般存在一个必要条件。该理论发现导致本发明具有极好的屈曲后稳定性，这将满足该研究项目的目标。