Seismic behavior of three-leaf stone masonry buildings before and after interventions: Shaking table tests on a two-storey masonry model

Vintzileou, Elizabeth; Mouzakis, Charalambos; Adami, Chryssi-Elpida; Karapitta, Lucia

doi:10.1007/s10518-015-9746-x

Cited by 64 publications

(24 citation statements)

References 13 publications

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“…Tests for Non-Seismic Load Scenarios, Linear Dynamic Spectrum Analysis were respectively done with a spectral response, as well as a Non-Linear Static Seismic Analysis (called Push-Over) [3], [19], [20]. In the Linear Dynamic Spectrum Analysis, in accordance with the national regulations [18], the vibration modes taken into account had to involve a mass >5 % of the total mass of the structure, and the sum of the total mass involved in the vibration modes considered had to be at least 85 % of the total mass of the structure.…”

Section: Methodsmentioning

confidence: 99%

Comparación de modelos sísmicos para un edificio histórico en mampostería

Saba

Meloni

2018

revuin

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Vol. 17, n° 2, pp. [105][106][107][108][109][110][111][112][113][114] 2018 Revista UIS Ingenierías AbstractIn this project, a historic masonry building in Sardinia, Italy has been considered as a case study for the comparison of two approaches for modeling, static and seismic analysis. Two software with different modeling approaches were employed with the purpose of comparing and discussing the results. SismiCad12 was used to simulate the structural behavior of the historic masonry building. SismiCad12 uses the Finite Element Method (FEM) that allows to model and analyze most types of 3D structures, and it is suitable for masonry structures. On the other hand, a different and innovative modeling approach called Frame Macro Elements (FME) was also applied using the 3Muri software, specially designed for assessing the linear, nonlinear, and seismic behavior of masonry structures.Assuming the same hypothesis to construct the 3D model of the structure in each code, the results of the static analysis show a different distribution of the vertical loads in the structure, which are more realistic in the FEM modeling. This different criterion of evaluation of the vertical loads carries a mechanism of "soft floor" in the pushover analysis in the FEM modeling, and therefore, a lower ultimate displacement corresponding to the collapse of the structure. On the other hand, in dynamic analyzes, FME modeling is more receptive to reality, involving a massive percentage of masses participating in the first vibration modes.Keywords: macro-elements; historic structures; pushover analysis. ResumenEn este proyecto se ha considerado como caso de estudio un edificio histórico de mampostería en Cerdeña, Italia, cuyo modelado, análisis estático y sísmico han sido desarrollados. En este estudio se han empleado dos programas informáticos con distintos enfoques de modelización con el propósito de comparar y discutir los resultados. Como primer simulador del comportamiento de la estructura en mampostería se ha elegido SismiCad12, que es una suite de Elementos Finitos (FEM, por sus siglas en inglés) que permite modelar y analizar la mayoría de los tipos de estructuras 3D y es adecuado para estructuras de mampostería. Por otro lado, se ha aplicado un método de modelado diferente e innovador denominado Frame Macro Elements (FME) con el software 3Muri, diseñado específicamente para evaluar el comportamiento lineal, no lineal y sísmico de las estructuras en mampostería.Suponiendo la misma hipótesis para construir el modelo 3D de la estructura en cada código, los resultados de los análisis estáticos muestran una diferente repartición de las cargas verticales en la estructura, las que son más realísticas en el modelado FEM. Este diferente criterio de evaluación de las cargas verticales lleva un mecanismo de "piso suave" 106M. Saba, D. Meloni en el análisis de pushover en el modelado FEM, y por lo tanto un desplazamiento ultimo inferior correspondiente al colapso de la estructura. Por lo contrario, en los análisis dinámicos el modelado FME es má...

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Section: Methodsmentioning

confidence: 99%

Comparación de modelos sísmicos para un edificio histórico en mampostería

Saba

Meloni

2018

revuin

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“…This matrix is obtained as a form of a linear combination, between the mass and elastic stiffness matrices, as per the Rayleigh assumption. [ 9 ] Vintzileou et al [ 34 ] have determined experimentally the natural frequencies and damping ratios, from the response of the tested models during sine logarithmic sweep excitations. The damping ratio was calculated using the half‐power bandwidth method.…”

Section: Introductionmentioning

confidence: 99%

Dynamic homogenization approach for in‐plane and out‐of‐plane linear vibration analysis of masonry wall structures

Atailia

Meftah

Fouchal

2020

Structural Design Tall Build

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Summary In the present paper, a constitutive viscoelastic model for periodic masonry structures is proposed. Using a dynamic homogenization approach of the continuous and discrete‐based model leads to the determination of the anisotropic material properties by assigning the fictitious stress and strains of the homogeneous cell masonry unit. These properties are defined as complex moduli, which consist of real parts representing elastic stiffness and imaginary ones referring to energy dissipations. The advantage of the proposed model is that the damping properties associated to different modes of vibrations can be easily evaluated. Numerical and parametric investigations are conducted that reveal the capabilities of the model to an accurate prediction of the dynamic properties of the masonry walls mainly under both in‐plane and out‐of‐plane vibrations.

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“…Therefore, before laminated rubber bearings are used in practical applications, their seismic performance needs to be verified based on the shaking table, which is a specific device for shaking structural models or building components with a simulated seismic wave [5,6]. In general, displacement is a most important parameter to reflect the dynamic response of the shaking table structure, and the contacted linear displacement gauge is the most commonly used transducer to capture displacement changes of the shaking table structure during the shaking experiment [7][8][9]. One of the major shortcomings of the contacted linear displacement gauge is that it can only provide one-dimensional displacement data at a single point on the shaking table structure.…”

Section: Introductionmentioning

confidence: 99%

Tri-Camera High-Speed Videogrammetry for Three-Dimensional Measurement of Laminated Rubber Bearings Based on the Large-Scale Shaking Table

et al. 2018

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Laminated rubber bearings are widely used for the mitigation of seismic damage of large-scale structures and equipment. However, owing to the flexibility in horizontal direction, the traditional contacted transducer is difficult to acquire the displacement data accurately in the three directions, respectively. In this paper, three-dimensional displacement measurement of laminated rubber bearing based on the large-scale shaking table is achieved by the use of a tri-camera high-speed videogrammetric system consisting of three complementary-metal-oxide-semiconductor (CMOS) cameras, one synchronous controller, and one pair of 1000 watt light sources, which are used to simultaneously acquire the tri-camera image sequences of laminated rubber bearing at a speed of 300 frames per second (fps). Firstly, this paper proposes a fast image block technique for detecting and tracking targets in tri-camera image sequences by integration of techniques morphological edge detection, attribute based ellipse extraction and least-squares-based fitting adjustment. Secondly, this paper presents an integrated bundle adjustment approach, which brings continuous tracking points into one collinearity condition equation, to reconstruct the three dimensional coordinates of continuous tracking points, for the purpose of improving the accuracy of three-dimensional coordinates of tracking points based on tri-camera image sequences. At last, an empirical experiment was conducted to measure the three-dimensional displacement of laminated rubber bearings on the shaking table by the use of the proposed method. The experimental results showed that the proposed method could obtain three-dimensional displacement of laminated rubber bearings with an accuracy of more than 0.5 mm.

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Seismic behavior of three-leaf stone masonry buildings before and after interventions: Shaking table tests on a two-storey masonry model

Cited by 64 publications

References 13 publications

Comparación de modelos sísmicos para un edificio histórico en mampostería

Comparación de modelos sísmicos para un edificio histórico en mampostería

Dynamic homogenization approach for in‐plane and out‐of‐plane linear vibration analysis of masonry wall structures

Tri-Camera High-Speed Videogrammetry for Three-Dimensional Measurement of Laminated Rubber Bearings Based on the Large-Scale Shaking Table

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