Experimental and theoretical study on a building structure controlled by multi-dimensional earthquake isolation and mitigation devices

Xu, Zhao‐Dong; Gai, Pan-Pan; Zhao, Hongtao; Ling-yi, LU

doi:10.1007/s11071-017-3482-5

Cited by 37 publications

(23 citation statements)

References 34 publications

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“…where ∆W is the total absorbed energy, W is the elastic energy, F max is the maximum force, and u 0 is the maximum displacement. Under sinusoidal excitation, the relationship between the damping force and excitation displacement can be written as follows [15,16]:…”

Section: Parameter Identificationmentioning

confidence: 99%

“…After generating the hysteretic loops from the experimental data, the unknown parameters can be identified by the direct least-square fitting method [17,18], and then the damping parameters can be calculated: Under sinusoidal excitation, the relationship between the damping force and excitation displacement can be written as follows [15,16]:…”

Section: Parameter Identificationmentioning

confidence: 99%

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Dynamic Analysis of a Spring-Asphalt Three-Dimensional Isolation System Based on Cyclic Simple Shear and Shaking Table Tests

Shang

Wang

2020

Applied Sciences

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Damping is one of the important issues related to isolated structures, including the newly proposed low-cost spring-asphalt isolation system. In this study, the damping properties of the system in terms of displacement dependence, frequency dependence and temperature dependence were studied by a cyclic simple shear experiment. Then, the direct least-square method was used to identify the damping properties from the experimental data. Furthermore, to validate the effectiveness of the damping device, a modal analysis was conducted based on multi-dimensional shaking table tests. The results indicate that (1) the hysteretic curves are similar to an ellipse, which means that the asphalt shows characteristics of viscoelastic materials; (2) the damping properties are positively related to the loading frequency and inversely related to the temperature and displacement; and (3) asphalt can provide adequate damping and reduce the displacements of the superstructure by nearly half. On the basis of the experimental test results, an analysis of the modal information with multi-dimensional input is also presented.

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Section: Parameter Identificationmentioning

confidence: 99%

Section: Parameter Identificationmentioning

confidence: 99%

Dynamic Analysis of a Spring-Asphalt Three-Dimensional Isolation System Based on Cyclic Simple Shear and Shaking Table Tests

Shang

Wang

2020

Applied Sciences

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“…A correction model based on the equivalent standard solid model is presented and used during the design, and excitation amplitude is taken into account. Xu et al (2017b) studied the excellent performance of an innovative device using viscoelastic material named MEIMD for multi-dimensional earthquake isolation and mitigation, as shown in Figure 2. Based on the experimental results of property tests and shaking table tests, it proves that this device has good isolation ability and damping performance both horizontally and vertically (Xu, 2009).…”

Section: Mitigation and Isolation Devices With High Damping Materialsmentioning

confidence: 99%

“…Afterwards, more optimized theories and precise models were proposed for multi-dimensional vibration isolation devices. For example, as for the description of viscoelastic dampers, the traditional models based on one dimension such as the Kelvin model, the Maxwell model, and the standard linear solid model were developed into the fractional-derivative equivalent standard solid model and the integrated mathematical model to meet the demands of multidimensional vibration isolation (Xu et al, 2014(Xu et al, , 2017b. The application of these devices has been expanded in a variety of fields, such as civil engineering, mechanical engineering and aerospace engineering.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Multi-Dimensional Vibration Mitigation Materials and Devices

Chen

Zhou

et al. 2019

Front. Mater.

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Harmful vibrations can cause many engineering problems, such as disasters of civil engineering structures, failure of precision equipment, and the disruption of some spacecraft components. In most situations, the vibrations are usually three-dimensional excitations. Therefore, research on multi-dimensional vibration control has become a worldwide hotspot in engineering. This article presents a comprehensive assessment of recent developments of multi-dimensional vibration mitigation devices and the material applied in such devices. The vibration mitigation materials mainly include the passive vibration mitigation materials and smart vibration mitigation materials. Subsequently, the vibration mitigation devices in civil engineering, mechanical engineering, and aerospace engineering are reviewed and commented, respectively. Above all, the multi-dimensional vibration mitigation devices and materials are found to be effective for reducing multi-dimensional vibrations. However, enhancing the mitigation performance of the devices in each direction, including improving the mitigation capability of materials, is still a challenging issue.

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“…DesRoches and Fenves (2000) proposed a methodology for the design of these restrainers, decreasing the earthquake effects. The application of viscoelastic dampers on the structural basis is investigated by Xu (2007) and later extended by Xu (2009) and Xu et al (2017) where multidirectional load conditions are considered.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of earthquake-resistant structures using shape memory alloy composites

Vignoli

Savi

El-Borgi

2020

Journal of Intelligent Material Systems and Structures

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Earthquake-resistant structures have been widely investigated in order to produce safe buildings designed to resist seismic activities. The remarkable properties of shape memory alloys, especially pseudoelastic effect, can be exploited in order to promote the essential energy dissipation necessary for earthquake-resistant structures. In this regard, shape memory alloy composite is an idea that can make this application feasible, using shape memory alloy fibers embedded in a matrix. This article investigates the use of shape memory alloy composites in a one-story frame structure subjected to earthquakes. Different kinds of composites are analyzed, comparing the influence of matrix type. Both linear elastic matrix and elastoplastic matrix with isotropic and kinematic hardening are investigated. Results indicate the great energy dissipation capability of shape memory alloy composites. A parametric analysis allows one to conclude that the maximum shape memory alloy volume fraction is not the optimum design condition for none of the cases studied, highlighting the necessity of a proper composite design. Despite the elastoplastic behavior of matrix also dissipates a considerable amount of energy, the associated residual strains are not desirable, showing the advantage of the use of shape memory alloys.

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Experimental and theoretical study on a building structure controlled by multi-dimensional earthquake isolation and mitigation devices

Cited by 37 publications

References 34 publications

Dynamic Analysis of a Spring-Asphalt Three-Dimensional Isolation System Based on Cyclic Simple Shear and Shaking Table Tests

Dynamic Analysis of a Spring-Asphalt Three-Dimensional Isolation System Based on Cyclic Simple Shear and Shaking Table Tests

Recent Advances in Multi-Dimensional Vibration Mitigation Materials and Devices

Nonlinear dynamics of earthquake-resistant structures using shape memory alloy composites

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