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Project Title
Seismic Risk of Mined Tunnels
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11180937
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Now showing 1 - 9 of 9
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Modelling of earthquake-induced pounding between adjacent structures with a non-smooth contact dynamics method

2021 , T. Langlade , D. Bertrand , S. Grange , CANDIA AGUSTI, GABRIEL ALFONSO , J.C. de la Llera

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Performance-based probabilistic assessment of liquefaction-induced building settlements

2021 , Chenying Liu , Jorge Macedo , CANDIA AGUSTI, GABRIEL ALFONSO

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Ground Motion Correlations from Recorded Mexican Intermediate-depth, Intraslab Earthquakes

2021 , Miguel A. Jaimes , CANDIA AGUSTI, GABRIEL ALFONSO , Alhelí S. López-Castañeda , Jorge Macedo

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A Consistently Processed Strong-Motion Database for Chilean Earthquakes

2022 , Sebastián Castro , Roberto Benavente , Jorge G. F. Crempien , CANDIA AGUSTI, GABRIEL ALFONSO , Juan Carlos de la Llera

Since the 1985 M 8.0 central Chile earthquake, national strong-motion seismic networks have recorded ten megathrust earthquakes with magnitudes greater than M 7.5 at the convergent margin, defined by the contact between the Nazca and South American plates. The analysis of these earthquake records have led to improved hazard analyses and design codes for conventional and seismically protected structures. Although strong-motion baseline correction is required for a meaningful interpretation of these records, correction methods have not been applied consistently in time. The inconsistencies between correction methods have been neglected in the practical use of these records in practice. Consequently, this work aims to provide a new strong-motion database for researchers and engineers, which has been processed by traceable and consistent data processing techniques. The record database comes from three uncorrected strong motion Chilean databases. All the records are corrected using a four-step novel methodology, which detects the P-wave arrival and introduces a baseline correction based on the reversible-jump Markov chain Monte Carlo method. The resulting strong motion database has more than 2000 events from 1985 to the date, and it is available to download at the Simulation Based Earthquake Risk and Resilience of Interdependent Systems and Networks (SIBER-RISK) project website.

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Performance-based assessment of the seismic pseudo-static coefficient used in slope stability analysis

2020 , Jorge Macedo , CANDIA AGUSTI, GABRIEL ALFONSO

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New developments for the performance-based assessment of seismically-induced slope displacements

2020 , Jorge Macedo , CANDIA AGUSTI, GABRIEL ALFONSO , Maxime Lacour , Chenying Liu

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Correlations of spectral accelerations in the Chilean subduction zone

2020 , CANDIA AGUSTI, GABRIEL ALFONSO , Alan Poulos , Juan Carlos de la Llera , Jorge G.F. Crempien , Jorge Macedo

The correlation between spectral accelerations is key in the construction of conditional mean spectra, the computation of vector-valued seismic hazard, and the assessment of seismic risk of spatially distributed systems, among other applications. Spectral correlations are highly dependent on the earthquake database used, and thus, region-specific correlation models have been developed mainly for earthquakes in western United States, Europe, Middle East, and Japan. Correlation models based on global data sets for crustal and subduction zones have also become available, but there is no consensus about their applicability on a specific region. This study proposes a new correlation model for 5% damped spectral accelerations and peak ground velocity in the Chilean subduction zone. The correlations obtained were generally higher than those observed from shallow crustal earthquakes and subduction zones such as Japan and Taiwan. The study provides two illustrative applications of the correlation model: (1) computation of conditional spectra for a firm soil site located in Santiago, Chile and (2) computation of bivariate hazard for spectral accelerations at two structural periods.

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Static and Dynamic Loads on a Shallow Circular Tunnel: Practical Design Considerations

2023 , MEDINA MOLINA, LUIS FELIPE , GUTIÉRREZ VEGA, CARLOS , LYON AUSENSI, BENJAMÍN , CANDIA AGUSTI, GABRIEL ALFONSO

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Performance-based analysis of Transit tunnels in the Chilean subduction zone

2022 , Benjamín Lyon , CANDIA AGUSTI, GABRIEL ALFONSO , Carlos Gutiérrez , Jorge Macedo

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