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首页> 外文期刊>International journal of non-linear mechanics >Numerical investigation on scaling a pure friction isolation system for civil structures in shaking table model tests
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Numerical investigation on scaling a pure friction isolation system for civil structures in shaking table model tests

机译：振动台模型试验中土木结构纯摩擦隔离系统定标的数值研究

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摘要

Many Coulomb friction-based devices have been used for seismic isolation of modern civil structures. Aiming at a practical problem that if the friction action could be scaled in a shaking table model test, a base isolation system using Coulomb friction was numerically scaled in different ways by considering the gravity distortion, friction distribution and other influence factors. The seismic responses back calculated from the scaled models were compared with those of the full-scale model to evaluate the accuracy of scale theory for such a Coulomb friction action. The above numerical results show that the scale theory is still applicable for the uniform and nonuniform friction distribution patterns with nonlinear characteristics. The gravity distortion and uneven friction distribution are the most important factors, causing the errors of scale theory for the Coulomb friction system. However, the unallowable errors, caused by the un-scaled gravity acceleration on common shaking tables, can be avoided by reasonably changing the friction coefficients at the scaled friction interface. And other unallowable errors, caused by the uneven friction distribution, can be prevented if the specific positions with different friction coefficients for the full-scale model are proportionally moved with the scaled contact surface. (C) 2017 Elsevier Ltd. All rights reserved.
机译：许多基于库仑摩擦的装置已用于现代民用建筑的地震隔离。针对一个实际问题，如果可以在振动台模型测试中确定摩擦作用的大小，则通过考虑重力变形，摩擦分布和其他影响因素，以不同的方式对使用库仑摩擦力的基础隔震系统进行数值缩放。将由比例模型返回的地震响应与全比例模型的地震响应进行比较，以评估这种库仑摩擦作用的比例理论的准确性。以上数值结果表明，尺度理论仍然适用于具有非线性特征的均匀和非均匀摩擦分布模式。重力变形和不均匀的摩擦分布是最重要的因素，从而导致库仑摩擦系统的尺度理论出现误差。但是，可以通过合理地更改缩放后的摩擦界面处的摩擦系数来避免由普通振动台上未按比例缩放的重力加速度引起的不允许的误差。如果将全尺寸模型的具有不同摩擦系数的特定位置与缩放的接触表面成比例地移动，则可以防止由不均匀的摩擦分布引起的其他不允许的错误。 （C）2017 Elsevier Ltd.保留所有权利。

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