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首页> 外文期刊>Journal of Civil Engineering and Science >Experimental and Numerical Analysis for the Structural Identification of the Dynamical Properties of a Masonry Building Prototype
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Experimental and Numerical Analysis for the Structural Identification of the Dynamical Properties of a Masonry Building Prototype

机译：砌体建筑原型动力特性结构识别的实验和数值分析

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Masonry buildings are known to be characterized by poor performances during seismic events. In fact, their behavior is not optimal when they are loaded by horizontal forces associated to the seismical actions on the structure. In order to characterize the dynamical properties of masonry buildings when subject to horizontal forces, a masonry building prototype has been realized in the laboratory and an experimental investigation campaign has been conducted with the aim of determining a structural identification of the masonry building prototype. Furtherly, the characterization of the structure is also performed via a numerical analysis of the dynamical behavior of the masonry building. Numerical tests are performed and a finite element model of the masonry building prototype is presented in order to achieve the characterization of the dynamical parameters through a comparative analysis of the experimental and the numerical data. Accordingly, in the present paper an experimental campaign is illustrated which has been performed on a masonry building prototype for studying the structural behavior of the masonry building subject to harmonic horizontal forces of different intensity. A physical model is realized in the laboratory by considering a two-storey masonry building. The structure test is subjected to harmonic horizontal force inputs supplied by a vibrodyne. The experimental results characterize the dynamical effects of the masonry building prototype subject to harmonic forces and illustrate the behavior of the building under the predominant actions of a seismic input. Further a finite element modeling of the masonry building prototype is considered and a numerical analysis is performed for describing the dynamical features of the system. The finite element modeling of the structure has the aim to reproduce the experimental testings of the masonry building subject to the harmonic force inputs. For different monitored nodal points of the finite element mesh, the frequency response functions corresponding to the frequency load inputs are determined. Consequently, a comparative analysis is reported in order to perform the characterization of the suitable dynamical parameters of the structure and to finalize the structural identification of the masonry building. Such comparative analysis between the experimental results obtained on the masonry building prototype and the numerical results obtained with the finite element analysis allows assessing the calibration of the material dynamical parameters for characterizing the dynamical behavior of the masonry structure. The proper assessment of the dynamical parameters of the masonry building allows having a refined structural identification of the masonry building for a better and more accurate simulation of the dynamical behavior of the structure.
机译：众所周知，砖石建筑在地震事件中表现不佳。实际上，当它们受到与结构上的地震作用有关的水平力的作用时，它们的性能并不是最佳的。为了表征在水平力作用下砌体建筑的动力特性，在实验室中实现了砌体建筑原型，并进行了实验研究活动，目的是确定砌体建筑原型的结构标识。此外，结构的表征还通过对砌体建筑物的动力行为进行数值分析来进行。进行了数值测试，并提出了砌体建筑原型的有限元模型，以便通过对实验数据和数值数据进行比较分析来实现对动力参数的表征。因此，在本文中，示出了对砌体建筑原型进行的实验活动，以研究砌体建筑在不同强度的谐波水平力作用下的结构性能。通过考虑两层砖石建筑，在实验室中实现了物理模型。结构测试要承受由振膜提供的谐波水平力输入。实验结果表征了受谐波力作用的砌体建筑原型的动力效应，并说明了在地震输入的主要作用下建筑物的行为。此外，考虑了砌体建筑原型的有限元建模，并进行了数值分析以描述系统的动力特性。该结构的有限元建模旨在再现受谐波力输入的砌体建筑的实验测试。对于有限元网格的不同监视节点，确定与频率负载输入相对应的频率响应函数。因此，据报道进行了比较分析，以便对结构的合适动力参数进行表征，并最终确定砖石建筑的结构。通过在砌体建筑原型上获得的实验结果与通过有限元分析获得的数值结果之间的这种比较分析，可以评估用于表征砌体结构动力特性的材料动力学参数的校准。对砌体建筑动力参数的正确评估允许对砌体建筑进行精确的结构识别，以更好，更准确地模拟结构的动力行为。

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