Research of air-cushion isolation effects on high arch dam reservoir

Zhang, Shaojie; Chen, Jiang; Zhang, Yuan-Ze; Hao-wu, Liu

doi:10.1007/s10409-011-0481-5

Cited by 4 publications

(5 citation statements)

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“…Chen et al studied the isolation and anti-cracking effects of the air-cushion on seismic behavior of a high arch concrete dam. 12 The obtained results show that the air-cushion decreases the cracking range of the dam body effectively and the isolation effects of the aircushion are considerable.…”

Section: Introductionmentioning

confidence: 84%

Seismic Optimization of Concrete Gravity Dams Using a Rubber Damper

Khiavi¹,

Ghorbani²,

Rahmati³

2020

The International Journal of Acoustics and Vibration

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One of the major factors in an economic project of new concrete dams and safety valuation of available dams in seismic areas is the control and dissipation of the induced hydrodynamic pressure induced by dam and reservoir interaction. As one of the main control functions, dissipating the induced hydrodynamic pressure on the upstream face of the dam is considered in the evaluations. In this paper, the effects of a rubber damper as an isolation layer on the dam's seismic control have been investigated. For optimization of the rubber damper thickness and height, the Monte Carlo probabilistic analysis is used. The ANSYS program on the basis of finite element technique is applied for modeling and analysis. The Pine Flat dam in California, due to components of El Centro, San Fernando and North Ridge earthquake is modeled as a case study to evaluate the effect of upstream isolation layer on seismic control and optimization. The effect of the thickness and height of the rubber damper on reducing the responses is investigated and the optimum thickness and height are selected using sensitivity analysis for safe and economic design. The obtained results show the capability of the rubber damper in the seismic and hydrodynamic control of the sample model.

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Section: Introductionmentioning

confidence: 84%

Seismic Optimization of Concrete Gravity Dams Using a Rubber Damper

Khiavi¹,

Ghorbani²,

Rahmati³

2020

The International Journal of Acoustics and Vibration

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“…To verify the seismic isolation effect of the air-cushion and correctness of the numerical model, a 6×6 m large-scale high-performance earthquake simulation shaking table from the Nuclear Power Institute of China (made by Servo Test Co., Britain) was used to conduct a 1:300 dynamic model test for Jinping I Arch dam [3,16], as shown in Fig. 4.…”

Section: Verification Experimentsmentioning

confidence: 99%

“…1) as a soft buffer layer and low pass filter to isolate the transmission of the water wave and reduce the hydrodynamic pressure, thereby further reducing the dynamic response of the dam. This measure is referred as air-cushion seismic control of concrete dams [3,16]. As early as the 1950s and 60s, the former Soviet Union and France started to study air-cushion seismic isolation technology for dams and achieved success.…”

Section: Introductionmentioning

confidence: 99%

“…As early as the 1950s and 60s, the former Soviet Union and France started to study air-cushion seismic isolation technology for dams and achieved success. Haowu et al [3,16] proposed a dynamic analysis model of the interactive effect of a dam-dam base-air-cushion-reservoir. In the model, the displacement format of the Lagrangian method is adopted for the air-cushion element; based on the ideal air state equation, the relation between material parameters of the air-cushion element and water pressure is derived.…”

Section: Introductionmentioning

confidence: 99%

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Study on air-cushion isolation control of concrete dam and its anti-cracking effect

Chen¹,

Xiong²,

Ge³

2018

J. vibroeng.

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The seismic problem of concrete dams has long been a difficult issue facing academic and engineering researchers. Traditional anti-seismic and isolation measures produce unfavorable results in hydraulic structures. However, the air-cushion seismic isolation technique represents a new development orientation for the anti-seismic method of concrete dams. To study the isolation and anti-cracking effects of the air-cushion, the gas-liquid-solid tri-phase coupling numerical model of the air-cushion isolation control of high arch dams is presented in this paper, in which the cracking behavior of concrete is considered. A 300 m level dam was simulated numerically under three different seismic intensities. The results show that the air-cushion reduces the hydrodynamic pressure significantly. The maximum hydrodynamic pressure is reduced by more than 70 %, and the acceleration of the dam crest is reduced by more than 50 % with a 1 m air-cushion. The reduction in hydrodynamic pressure and dam acceleration increases with increasing seismic intensity. In addition, the air-cushion decreases the cracking range of the dam body effectively. Thus, the isolation effects of the air-cushion are remarkable.

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“…We adopted a well-established method [33,34] to functionalize GO with COOH groups and labeled as GO-COOH.…”

Section: Surface Modification Of Gomentioning

confidence: 99%