Seismic analysis on reinforced concrete group silos through shaking table tests

Xu, Qikeng; Zhang, Hao; Liu, Qiang

doi:10.1002/suco.202000207

Cited by 10 publications

(5 citation statements)

References 8 publications

(7 reference statements)

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“…Nevertheless, the silo wall rigidity is inspected for silos subjected to ground motions [14] and the response of the ensiled material under earthquakes [15]. Furthermore, a study was implemented to discuss the causes of the major failures in singular silos [16] and a group of silos under seismic excitation [17].…”

Section: Nomenclature Cmentioning

confidence: 99%

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Hussein¹,

Risan²

2022

Structural Durability &Amp; Health Monitoring

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Silos are strategical structures used to stockpile various types of granular materials. They are highly vulnerable to earthquake excitation and have been frequently reported to fail at a higher rate than any other industrial structure. The seismic response of silos within the near-fault region will suffer a complex combination of loadings due to the unique characteristics of the near-fault ground motions; which are usually associated with a large amplitude pulse at the beginning of either the velocity or the displacement time histories. This study aims to numerically evaluate the seismic response of reinforced concrete cylindrical silos under near-fault ground motions (NFGM) and farfield ground motions (FFGM). The assessment investigates the impact of the slenderness ratio and the parameters' influence on the seismic behavior of reinforced concrete silos. The validity of the Eurocode provisions in the structural safety of silos will also be inspected. The nonlinear time history analysis is carried out through the finite element approach by examining four silos with different slenderness ratios. The concrete damage plasticity model is assigned to the silo wall to simulate the nonlinear behavior of concrete in the plastic zone; while, the behavior of the stored material is represented by the Drucker-Prager plastic model. The wall-granular material interaction is considered and defined by coulomb's friction theory. The results of the near-fault records reveal a growth up to 72.8% in the hoop stress and 160.4% in the vertical stress compared to the far-field earthquakes. Consequently, the seismic response of reinforced concrete silos is highly sensitive to the type of ground motion, and slender silos tend to impose greater structural demand under the NFGM. Additionally, The Eurocode-8 seismic provisions were adequate in the conventional far-field ground motions and less effective in the near-fault zone.

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Section: Nomenclature Cmentioning

confidence: 99%

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Hussein¹,

Risan²

2022

Structural Durability &Amp; Health Monitoring

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“…From the 19th century to the present, the research work conducted by domestic and foreign experts and scholars on it has been in continuous development. Much of the early research on the structure of the silo focused on obtaining its characteristic dynamic parameters, and relevant experts and scholars [1][2][3][4] conducted shaking table tests by seismic simulation and related theoretical calculations of silo models, mainly to study the seismic performance. Then some scholars [5][6][7] conducted much research on the dynamic lateral pressure of silo structure unloading.…”

Section: Introductionmentioning

confidence: 99%

Research on seismic response and dynamic lateral pressure of the silo model under dynamic interaction between granular materials and the silo wall

Zhang,

Yang,

Wang

2024

Structural Concrete

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The purpose is to study seismic response and dynamic lateral pressure of the silo wall with different storage conditions under the earthquake. FEM was used to conduct dynamic time history analysis of the silo. The seismic response of the empty silo was smaller than that of the filled silos, and for the latter, under seismic action, the bulk sand particles and the silo wall had a more complex dynamic interaction, and nodes displacements on the wall and columns mainly fluctuated rising. For the deformation of the bulk sand, it was similar to a parabolic pattern in section, the closer to the silo center the greater the deformation was, and the farther away from the silo center the smaller the deformation was. The maximum acceleration was near the top of the wall in the empty silo, near the middle of the wall in contact with bulk sand in the filled silos. Nodes maximum overpressure coefficient was 1.6 and 2.9 in half fully and fully filled silos, respectively, but the coefficient 2.9 was greater than the standardized value of 2.0, therefore, the suggested overpressure coefficient was proposed. Meanwhile, Mises stress was investigated, and it was smaller in the empty silo, but larger in the filled silos, particularly in and around the ring beam due to the dynamic interaction between the sand and the silo wall, where the stiffness had a sudden change, and the maximum stress at the ring beam increased gradually with the seismic action.

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“…For an existing elevated steel silo group in Italy, Kanyilmaz and Castiglioni [33] studied the effectiveness of a base isolation system (curved surface sliders) by comparing the performance of the structure before and after retrofitting. Xu et al [34] evaluated the seismic performance of elevated grouped silos, supported on a skirt extending to the ground, through the shaking table tests and the finite element analysis. They evaluated dynamic characteristics, seismic responses, cracking patterns, and failure mechanisms of the grouped silo model under empty and full conditions.…”

Section: Introductionmentioning

confidence: 99%

The behavior of the RC grouped silos under earthquake excitation according to different internal loadings

Demir¹

2023

JSEAM

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Reinforced concrete grouped silos-commonly employed in the industry to store granular materials- also needs to be designed in earthquake-prone areas. Silos experience a higher rate of structural failures than the majority of other types of construction. And one of the main causes of silo failure is the dynamic overpressures caused by stored materials under seismic loads. However, the principles determining loads on such structures and requirements for their structural analysis aren’t precisely specified in relevant codes of design. Instead of emphasizing grouped silos that interact strongly, the present dynamic design only concentrates on a single silo which can lead to unrealistic solutions for grouped silos. Therefore, it is necessary to determine the seismic behavior of grouped silos more accurately. This paper aims to investigate the seismic behavior of RC on-ground grouped silos compared to single ones by using a numerical model because of its adaptability, which allows for the analysis of a wide range of silo problems. In this context, a three-dimensional finite element model, that considered the interaction between stored material and silo wall as well as the continuity of the silo walls, was performed using ANSYS software. Two different aspect ratios and three different internal loading cases were taken into account for the parametric study to demonstrate their influences on dynamic overpressures and equivalent base shear forces in RC-grouped silos. It is concluded that designing the on-ground slender grouped silos with a high aspect ratio as individual single silos is unreasonable and may produce very low values for the base shear force.

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Seismic analysis on reinforced concrete group silos through shaking table tests

Cited by 10 publications

References 8 publications

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Research on seismic response and dynamic lateral pressure of the silo model under dynamic interaction between granular materials and the silo wall

The behavior of the RC grouped silos under earthquake excitation according to different internal loadings

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