Model-Free Identification of Hysteretic Restoring-Force Characteristic of Multi-Plane and Multi-Story Frame Model With In-Plane Flexible Floor
Model-Free Identification of Hysteretic Restoring-Force Characteristic of Multi-Plane and Multi-Story Frame Model With In-Plane Flexible Floor
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DOI：
10.3389/fbuil.2020.00048
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
K. Shintani;S. Yoshitomi;I. Takewaki
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文献类型：
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作者：
K. Shintani;S. Yoshitomi;I. Takewaki
在线性系统辨识得到广泛发展的同时，非线性滞后系统辨识的研究进展并不令人满意。本文提出了一种新的平面内柔性楼盖结构滞回动力特性识别方法。在不假设滞回类型或恢复力特性的先验知识的情况下，从实测的楼层水平加速度以及楼层的滞回力特性识别三维建筑结构中的竖向结构框架的滞回力特性。对竖向框架的层间剪力和水平框架（楼层）的面内剪力的时程反应进行了傅立叶展开。一个批处理最小二乘估计方法的实测数据被证明是适用于识别的傅立叶系数的层间剪力在垂直结构框架和那些在平面内剪力在地板上。该方法只需进行傅立叶展开和批处理最小二乘估计，简单直接。通过有噪声和无噪声的数值模拟，验证了该方法的准确性和可靠性。结果表明，该方法可以成功地识别具有平面柔性楼板的三维建筑结构中平面框架的滞回动力特性。
While linear system identification (SI) has been developed extensively, research advancement in the field of non-linear hysteretic SI is not satisfactory. An innovative method is proposed in this paper for identification of hysteretic restoring-force characteristics of three-dimensional (3D) building structures with in-plane flexible floors. The hysteretic restoring-force characteristics of vertical structural frames in the 3D building structure are identified from the measured floor horizontal accelerations together with the hysteretic restoring-force characteristics of floors without the assumption of hysteresis types or a priori knowledge of restoring force characteristics. Fourier expansion is applied to the time-history responses of story shear forces in vertical frames and in-plane shear forces in horizontal frames (floors). A batch processing least-squares estimation method for measured data is shown to be applicable to the identification of the Fourier coefficients on the story shear forces in vertical structural frames and those on the in-plane shear forces in floors. The proposed method is simple and direct because only Fourier expansion and batch processing least-squares estimation are required. Numerical simulations with and without noise are conducted for investigating the accuracy and reliability of the proposed method. It is demonstrated that the proposed method can identify successfully the hysteretic restoring-force characteristics of plane frames in 3D building structures with in-plane flexible floors.