Shaking table tests on a deep-water high-pier whole bridge under joint earthquake, wave and current action

Yun, Gaojie

doi:10.1016/j.apor.2020.102329

Cited by 26 publications

(14 citation statements)

References 24 publications

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“…Typically, deeper water will result in lower natural frequencies, and the influence is more important for the second-order frequency than for the first-order frequency. 16,19 This suggests that the additional mass effect of water on the columns' dynamic characteristic is influential.…”

Section: Modal Analysismentioning

confidence: 99%

“…14 These systems not only provide the seismic vibration function, but also reproduce hydrodynamic forces, wave, and current loading conditions. [15][16][17][18][19][20] Normally, the specimen in a shaking table test is scaled from real structures and the scaling process needs to follow the similitude law. The added mass is commonly attached to the specimen to increase its effective material density as desired by the similitude law, which is called the artificial mass modeling method.…”

Section: Introductionmentioning

confidence: 99%

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A coordinative scaled model design method with attached plates for underwater shaking table tests

Wei,

Shi,

Chang

et al. 2023

Earthquake Engineering and Resilience

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Structures located in the water environment undergo additional hydrodynamic forces induced by fluid–structure interaction under earthquakes, which could increase the dynamic responses and affect the seismic performance of underwater structures. Underwater shaking table tests are generally used to verify the seismic performance of structures by using scaled models. Unlike the traditional shaking table without water, it is difficult to design the scaled model as the traditional similitude law requires the designer to change the mass density of water, which is impossible in reality. As a result, the mass density similitude ratio of water mismatches with that of the specimen, which leads to an inconsistent scale of the hydrodynamic forces and the inertia forces of the specimens. A new scaled model design method based on the coordinative similitude law is proposed. This increases the hydrodynamic forces of the model using attached plates to ensure the consistency of the similitude ratio of hydrodynamic forces and inertia forces. A series of numerical simulations are conducted in ADINA (finite element software) to validate the proposed coordinative scaled model design method with attached plates by comparing with the conventional scaled model (CSM) designed based on the artificial mass modeling method and the prototype under unidirectional and bidirectional earthquakes coupled with hydrodynamic forces. The results show that the maximum relative error of dynamic responses could reach 82.80% between the CSM and the prototype; while it is 25% between the coordinative scaled model with attached plates and the prototype. The coordinative scaled model with attached plates can reproduce the responses of the prototype with high accuracy, and thus it is recommended to be used in the underwater shaking table tests.

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Section: Modal Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A coordinative scaled model design method with attached plates for underwater shaking table tests

Wei,

Shi,

Chang

et al. 2023

Earthquake Engineering and Resilience

View full text Add to dashboard Cite

show abstract

“…Generally, the earthquakes dominate the dynamic response of bridge, while the influence of current and wave excitation could not be ignored. 138,139 Wu et al 140 examined the seismic performances of deep-water piers under earthquake, wave, and current combined excitation. The results stated that the influence factor of wave and current excitation on seismic response was −31.6% to 63.5%.…”

Section: Seismic Analysis Considering Water-structure Interactionmentioning

confidence: 99%

Seismic analysis and test facilities of deep‐water bridges considering water–structure interaction: A state‐of‐the‐art review

Zheng

et al. 2022

Earthquake Engineering and Resilience

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Deep‐water bridges are susceptible to severe damages under strong earthquakes. Water–structure interaction will considerably affect the dynamic performance of deep‐water bridges. In the past few decades, researchers have conducted extensive studies on the water–structure interaction and dynamic behavior of bridges through theoretical, numerical, and experimental investigations. This paper presents a comprehensive review on the calculation method for earthquake and wave‐induced hydrodynamic forces. The seismic responses of deep‐water bridges under individual or combined excitation of earthquake, wave, and current are discussed to explore the influence of water–structure interaction on the seismic capacity of deep‐water bridges. Finally, the development of testing facilities that can simulate the water–structure interaction is summarized. Particularly, a new multifunctional dual underwater shaking table system built‐in Tianjin University that can simulate multiple‐support excitation and water–structure interaction simultaneously is introduced in detail for the first time.

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“…Liang et al [3] studied the effect of earthquake actions on the vibration characteristics of bridge piers through centrifuge shaking table tests; they found that the natural frequency of bridge piers decreased (i.e., the period increased) with the increase in water depth. Yun et al [4] studied the effects of earthquake action, wave action, and ocean flow action on a deep-water high-pier bridge. The results showed that earthquake action plays a dominant role in the effects of the three actions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Effect of Water Depth on Earthquake Response of a Deep-water Cable-stayed Bridge Tower

Geng

Leng

et al. 2023

J. Phys.: Conf. Ser.

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With the aim of investigating the effect of water depth on the earthquake response of a deep-water cable-stayed bridge tower, this study designed and manufactured a large-scale bridge tower model, taking a cable-stayed bridge across a deep reservoir of a hydropower station as a reference. Under the boundary conditions similar to the reference, shaking table tests were conducted to reflect the structural response of the bridge tower under white noise and earthquake actions at different water depths. The time history curve of the bridge tower’s structural response was recorded and used to investigate the variations in the natural frequency, displacement, stress and strain of a deep-water cable-stayed bridge tower at different water depths under earthquake actions. The results showed that the natural frequency of the bridge tower decreased almost linearly with the increase in the water depth. The displacement at the tower top increased gradually with the increase in the water depth under earthquake actions. In addition, the stress and strain at the tower bottom increased almost linearly in the transverse direction and nonlinearly in the longitudinal direction with the increase in the water depth.

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Shaking table tests on a deep-water high-pier whole bridge under joint earthquake, wave and current action

Cited by 26 publications

References 24 publications

A coordinative scaled model design method with attached plates for underwater shaking table tests

A coordinative scaled model design method with attached plates for underwater shaking table tests

Seismic analysis and test facilities of deep‐water bridges considering water–structure interaction: A state‐of‐the‐art review

Experimental Study on Effect of Water Depth on Earthquake Response of a Deep-water Cable-stayed Bridge Tower

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