Evaluation of earthquake ground motions to predict cracking response of gravity dams

Léger, Pierre; Leclerc, Martin

doi:10.1016/0141-0296(95)00146-8

Cited by 39 publications

(5 citation statements)

References 10 publications

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“…With the increase in the computational power, nonlinear THA were increasingly viable for the seismic assessment of gravity dams. The first comprehensive coverage regarding the effect of ground motions using nonlinear THA, as presented in Léger and Leclerc, 2 agreed with the former conclusions for nonlinear response. The inclusion of vertical acceleration component along with the horizontal ( H ), that is, H + V analysis, was concluded to not change the critical scaling factor defined as the peak ground acceleration (PGA) level for the horizontal ground motion of a THA.…”

Section: Introductionsupporting

confidence: 66%

The effect of vertical motions on damage accumulation on concrete gravity dams

Soysal

Arıcı

2023

Earthq Engng Struct Dyn

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The effect of vertical ground motions on the seismic response of dams has long been a concern in the seismic design and evaluation of concrete gravity dams. The guidelines regarding the use of vertical motions in time history analysis (THA) are not clear due to the complexity of the effect as well as the large uncertainty in the motion selection process. The goal of this study is to assess the significance of vertical motions’ effects on concrete gravity dams considering the relevant variability due to ground motion, system frequency response as well as the shaking level. To this end, a carefully selected ground motion set providing realistic vertical(V)/horizontal(H) loading was used in nonlinear THAs of three different systems with different modal properties. In order to evaluate the intensity of shaking on the vertical motions’ effect, the responses were calculated at different seismic levels corresponding to operation, design, and maximum shaking levels. Along with traditional demand parameters commonly employed in assessing seismic response, cracking on the base and at the upstream face of the monolith was adopted as demand measures using a model capable of yielding discrete cracking on the system. The effect of vertical motions was quantified by comparing the response of H + V to H only shaking. The results show the vertical shaking can significantly affect upstream cracking for the operation or design level earthquakes, the effect increasing for larger dams.

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Section: Introductionsupporting

confidence: 66%

The effect of vertical motions on damage accumulation on concrete gravity dams

Soysal

Arıcı

2023

Earthq Engng Struct Dyn

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“…Furthermore, by using PCM for the surface layer, which has a dense internal structure, high permeability resistance can be ensured, so it can be said that this method is suitable for dam piers. Many past studies on the seismic resistance of dams have examined the seismic resistance of the entire dam structure [7][8][9][10]. However, there are few studies on the seismic resistance of dam piers that are relevant to the present study.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the effect of the cross-sectional shape and reinforcement range on the reinforcement effect was quantitatively analyzed. Many past studies on the seismic resistance of dams have examined the seismic resistance of the entire dam structure [7][8][9][10]. However, there are few studies on the seismic resistance of dam piers that are relevant to the present study.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Dam Piers Retrofitted with Reinforced Polymer Cement Mortar

2021

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The deterioration of existing reinforced concrete (RC) structures is regarded as a problem worldwide. In Japan especially, the deterioration of RC dam structures has become severe. Many such dams meet design standards that were in place at the time of construction but do not meet the current seismic design standards, and appropriate seismic retrofitting is required. If the dam pier, which is an important part of the dam related to water storage, is damaged by an earthquake, the gate cannot be opened or closed, and the amount of water stored cannot be controlled. Therefore, the seismic retrofitting of dam piers is a top priority. However, various construction restrictions exist for dam piers, such as only the cross-section on the downstream side can be reinforced, and not on the upstream side where water is stored. Thus, it is difficult to apply the same reinforcement method that is applied to the piers of general road bridges. Therefore, in this study, we confirm the effectiveness of the SRS method (seismic retrofitting using cement mortar for shotcrete), which is suitable for partial reinforcement. Specifically, the dam piers of four types of existing dams were modeled using the three-dimensional finite element method, and a seismic response analysis was performed by inputting two types of seismic waveforms having different characteristics. As a result, the reinforcement effect of this method was verified according to structural characteristics. Furthermore, the effect of the reinforcement range on the reinforcement effect was clarified.

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“…of the ASCE, 1976). The model of Epstein is well known [8,9]. Unfortunately, the available proposals have two drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Some principles of generating seismic input for calculating structures

Uzdin

Prokopovich

2020

E3S Web Conf.

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In this paper different models of seismic input are analyzed. The most essential characteristics of seismic effects are peak ground acceleration, peak ground velocity, peak ground displacement, Arias intensity, cumulative absolute velocity, seismic energy density, harmonic coefficient κ, pseudo spectral kinematic characteristics, root-mean-square peak kinematic characteristics, plastic forces work and damage spectrum. The influence of seismic impulse on characteristics of seismic input is studied. A.A. Dolgaya’s and L.N. Dmitrovskaya’s models with seismic impulse are compared. L.N. Dmitrovskaya’s model allows to reach estimated values of energy characteristics of seismic input with the smallest deviation. When generating such processes, it is important to take into account both the properties of real actions and the limiting state of the calculated structure. The considered models of seismic inputs should be applied in the following cases: a) in case of designing mass construction projects when it is not possible to get a package of design accelerograms, b) in typical designing when the design object can be located on sites with different seismic and geological conditions, c) at early stages of designing important objects when the package of design accelerograms is not available yet but it is necessary to make technical solutions.

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Evaluation of earthquake ground motions to predict cracking response of gravity dams

Cited by 39 publications

References 10 publications

The effect of vertical motions on damage accumulation on concrete gravity dams

The effect of vertical motions on damage accumulation on concrete gravity dams

Seismic Performance of Dam Piers Retrofitted with Reinforced Polymer Cement Mortar

Some principles of generating seismic input for calculating structures

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