Calibration of a large shaking table equipment for testing geotechnical physical models under plane strain conditions

Filippo, Giuseppe Di; Casablanca, Orazio; Biondi, Giovanni; Cascone, Ernesto

doi:10.1016/j.soildyn.2022.107726

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…The shaking table array is more complex compared with the single shaking table system due to the tracking precision needed and also the synchronization precision needed to protect the test specimen [8]. Usually, the large structure used to carry out earthquake test experiments is very complex and represents obvious nonlinearity, and the shaking table array system also encounters various disturbances, etc., all of which increase the difficulty of the control system and, thus, influence the experiment effect [9,10].…”

Section: Introductionmentioning

confidence: 99%

Experiment Research on Complex Optimization Algorithm-Based Adaptive Iterative Learning Control for Electro-Hydraulic Shaking Tables

et al. 2023

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The adaptive iterative learning control method for electro-hydraulic shaking tables based on the complex optimization algorithm was proposed to overcome the potential stability problem of the traditional iteration control method. The system identification precision’s influence on convergence was analyzed. Based on the real optimization theory and the mapping relationship between real vector space and complex vector space, the complex Broyden optimization iterative algorithm was proposed, and its stability and convergence was analyzed. To improve the stability and accelerate the convergence of the proposed algorithm, the complex steepest descent algorithm was proposed to cooperate with the complex Broyden optimization algorithm, which can adaptively optimize the complex steepest gradient iterative gain and update the system impedance in real time during the control process. The shaking tables experiment system was designed, applying xPC target rapid prototype control technology, and a series of experimental tests were performed. The results indicated that the proposed control method can quickly and stably converge to the optimal solution no matter whether the system identification error is small or large, and, thus, verified that validity and feasibility of the proposed adaptive iterative learning method.

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Section: Introductionmentioning

confidence: 99%

Experiment Research on Complex Optimization Algorithm-Based Adaptive Iterative Learning Control for Electro-Hydraulic Shaking Tables

et al. 2023

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Large biaxial laminar shear box for 1-g shaking table tests on saturated sand

Fan,

Yuan,

Cudmani

et al. 2024

Soil Dynamics and Earthquake Engineering

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Investigation on dynamic performance of soilbag cushion using shaking table tests

Fang,

Liu,

et al. 2024

Geosynthetics International

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Soilbag cushion is one of the promising base isolation methods to reduce seismic energy transfer from ground to building structure. In this study, a series of shaking table tests were conducted comparatively on foundation models with soilbag cushion and sand cushion to evaluate their dynamic performance. The test results indicate that soilbag cushion could significantly reduce acceleration response and accumulated settlement compared to sand cushion. And the relatively smaller amplitude of dynamic lateral earth pressure measured on contact surface of soilbags within soilbag cushion also indicates its stability during oscillation. The advantages of soilbag cushion on energy dissipation and damping are more easily highlighted under the condition of high-acceleration, high-frequency or high uniformly distributed load. The dynamic performance of soilbag cushion is dependent on embedded depth and thickness. It is the most effective for soilbag cushion to be arranged near the rigid footing of building structure; it is suggested that the number of layers of soilbag cushion be controlled in the premise of the designed ratio of the thickness to the width of soilbag cushion ranging from 0.125 to 0.4 for low-rise or middle-rise masonry buildings in practical engineering.

show abstract

Calibration of a large shaking table equipment for testing geotechnical physical models under plane strain conditions

Cited by 4 publications

References 42 publications

Experiment Research on Complex Optimization Algorithm-Based Adaptive Iterative Learning Control for Electro-Hydraulic Shaking Tables

Experiment Research on Complex Optimization Algorithm-Based Adaptive Iterative Learning Control for Electro-Hydraulic Shaking Tables

Large biaxial laminar shear box for 1-g shaking table tests on saturated sand

Investigation on dynamic performance of soilbag cushion using shaking table tests

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