Deterministic Seismic Hazard Analysis to Determine Liquefaction Potential Due to Earthquake

Hanindya, K. A.; Makrup, Lalu; Widodo, .; Paulus, R.

doi:10.28991/cej-2023-09-05-012

Cited by 7 publications

(7 citation statements)

References 27 publications

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“…To show the effect of earthquake on the response of structures, it is necessary to use the time history of earthquake. Earthquake vibration data is required for the design of tall buildings or large-scale structures such as dams or bridges (41). In the present paper, the vertical and horizontal components of the Taft Earthquake were used in dynamic analyses of the Koyna Dam, as shown in Figures 2 and 3.…”

Section: Finite-element Modeling Of the Koyna Dammentioning

confidence: 99%

Seismic Assessment of Concrete Dams, Considering Anisotropy Caused by Lift Joints

Saeed,

Moradloo

2024

IJE

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Concrete dams are anisotropic due to lift joints that affect their performance. Lift joints are usually ignored in numerical analyses of concrete dams and the dam body is assumed to be homogeneous and isotropic. In this study, the seismic behavior of gravity dams was evaluated considering the anisotropy caused by lift joints, and the orthotropic and isotropic state responses were compared. Moreover, in the seismic loading range, a more detailed evaluation was done by applying the real effects of strain rate. Koyna concrete gravity dam was selected for the case study. The results showed that concrete anisotropy leads to larger dynamic displacements and greater damage to the dam body. By considering the orthotropic properties of concrete can lead to more realistic results. The maximum compressive and tensile stresses also increased in the anisotropic model compared to the homogeneous and isotropic model, indicating the usefulness of incorporating the orthotropic behavior of concrete in seismic analysis. In addition, considering the strain rate in the seismic loading range had an insignificant effect on the results. Therefore, considering the large dynamic increase factor in numerical analyses causes the error.

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Section: Finite-element Modeling Of the Koyna Dammentioning

confidence: 99%

Seismic Assessment of Concrete Dams, Considering Anisotropy Caused by Lift Joints

Saeed,

Moradloo

2024

IJE

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“…Eq (6) indicates that the cumulative distribution function (CDF) of P f is a log normal distribution. Therefore…”

Section: Theory Of Fragility Analysis and Life Cycle Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Traditionally, seismic design has relied on deterministic approaches [6], which consider earthquakes as singular events with predetermined characteristics. However, this approach fails to capture the inherent uncertainties associated with seismic hazards and their impact on structural response [6]. In contrast, PBSD approaches integrate probabilistic seismic hazard assessment, structural analysis, and performance-based engineering principles to account for uncertainties and provide a more comprehensive understanding of the bridge's behavior.…”

Section: Introductionmentioning

confidence: 99%

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Seismic Damage-Oriented Lifecycle Risk Cost Calculation for Cable-Stayed Bridge Infrastructure Using Fragility Method

Gao,

Zhao

2023

Machine Learning and Artificial Intelligence

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Cable-stayed bridges are critical components of modern transportation infrastructure, but their vulnerability to seismic events presents substantial risks to their long-term performance and safety. This paper focuses on the assessment of seismic damage in the lifecycle risk cost calculation for cable-stayed bridge infrastructure. The fragility method is utilized as a key approach to quantify seismic vulnerability and estimate associated risk costs throughout the bridge’s lifespan. Seismic fragility curves are developed by analyzing the structural response to various earthquake scenarios, providing a probabilistic representation of the bridge’s performance based on ground shaking intensity. This facilitates the evaluation of potential damage levels and their corresponding costs. The risk cost calculation encompasses direct expenses, including repair and replacement of damaged components, and employs statistical methods to estimate expected expenses. Stakeholders and decision-makers can utilize this approach to make informed choices regarding risk reduction investments, maintenance planning, and long-term sustainability considerations. A specific case study is conducted on a cable-stayed bridge, focusing on longitudinal seismic waves. The findings reveal that the main tower exhibits greater resilience compared to the tower abutment. The failure probabilities of slight, moderate, severe, and absolute damage for the main tower are determined as 9.8%, 1.1%, 0.3%, and 0.2% respectively, while the corresponding failure probabilities for the main abutment are 35.2%, 21.1%, 7.4%, and 2.9%. The maintain life cycle cost associated with seismic events for this bridge is estimated at 0.548 million USD. These results provide valuable insights for decision-making processes regarding risk reduction strategies, maintenance planning, and long-term sustainability considerations.

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“…There are various techniques, including in-situ and experimental methods to assess the potential of liquefaction for several soils. For instance, based on spectral matching to a target spectrum, Hanindya et al (7) developed an artificial time history of earthquake to study the liquefaction of a stratified ground and concluded that liquefaction potential reduces with increasing stiffness and depth of soil. Cone Penetration Test (CPT) results can also be employed to determine the liquefaction potential.…”

Section: Introductionmentioning

confidence: 99%

Cyclic and Monotonic Behavior of Non-plastic Silts with the Presence of Initial Static Shear Stress Using Strain Energy Approach: A Case Study for a Tailings Dam

Abdollahi,

Bolouri Bazaz,

Akhtarpour

2024

IJE

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Mining Exploration, excavation, and construction are considered as mining activities which are recently growing dramatically. Therefore, utilizing the mining wastes with the least environmental damage is a significant concern. Tailings dams are one of the conventional solutions that store the extracted hazardous substances safely for water resources management and environmental protection. This reseach deals with the effects of monotonic and seismic loadings on silt-sized copper wastes existed in a tailings dam at Northwest Iran as a case study. Various values of initial static shear stress are performed using an automated cyclic triaxial system. Monotonic undrained compressive tests were performed with a relatively constant density and considering three values of 50, 100, and 150 kPa for mean effective stress. Depending on the first density of samples, applying a mean effective confining pressure of 100 kPa, increased the initial densities by 25 to 30% as compared to the initial condition.Moreover, the effect of initial shear stress ratio with three values of 0, 0.2, and 0.4 was evaluated. No peak point was observed for samples under α = 0, whereas, samples with α = 0.4 encountered a peak point before reaching to the phase transformation point. The results of cyclic experiments were used to evaluate capacity energy and residual pore pressure based on the strain energy approach. Cyclic tests on the samples were performed considering the shear amplitude of 0.75% and frequency of 0.3 Hz. It is shown that the most energy dissipation occurs at the first cycle possessing the highest stiffness. For α = 0, energy density increased from 474 J/m 3 to 1147.4 J/m 3 ; however, a more intense increase was measured from 682 J/m 3 to 5839 J/m 3 when α = 0.4. It is also found that applying initial shear stress has a pretty considerable influence on monotonic strength and the liquefaction resistance of silts. The increase of α from 0 to 0.4 yielded a linear increase in the shear strength of samples in the range of 20 kPa to 70 kPa. The results of this paper were then validated accurately through some previous studies.

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Deterministic Seismic Hazard Analysis to Determine Liquefaction Potential Due to Earthquake

Cited by 7 publications

References 27 publications

Seismic Assessment of Concrete Dams, Considering Anisotropy Caused by Lift Joints

Seismic Assessment of Concrete Dams, Considering Anisotropy Caused by Lift Joints

Seismic Damage-Oriented Lifecycle Risk Cost Calculation for Cable-Stayed Bridge Infrastructure Using Fragility Method

Cyclic and Monotonic Behavior of Non-plastic Silts with the Presence of Initial Static Shear Stress Using Strain Energy Approach: A Case Study for a Tailings Dam

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