Searched for: subject%3A%22Seismics%22
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Alfaraj, Ali (author)
Imaging and inversion with seismic data recorded with sources and receivers at the surface are powerful tools to infer knowledge about the subsurface. However, creating an image with seismic data is unfortunately not as easy as taking a picture with a smartphone. The estimated subsurface models in many situations are far from ideal due to the...
doctoral thesis 2024
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Revelo Obando, B.A. (author)
Seismic survey design deals with determining the acquisition parameters that lead to the best possible imaging and characterization of the subsurface. The design of the survey is constrained by health, safety and environmental considerations and the available budget, seeking for a balance between quality and cost. Because seismic exploration is...
doctoral thesis 2024
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Bellezza, Cinzia (author), Barison, Erika (author), Farina, Biancamaria (author), Poletto, Flavio (author), Meneghini, Fabio (author), Böhm, Gualtiero (author), Draganov, D.S. (author), Janssen, M.T.G. (author), van Otten, Gijs (author)
Geothermal power production may result in significant CO2 emissions as part of the produced steam. CO2 capture, utilisation, subsurface storage (CCUS) and developments to exploit geothermal resources are focal points for future clean and renewable energy strategies. The Synergetic Utilisation of CO2 Storage Coupled with Geothermal Energy...
journal article 2024
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Sadowski, Adam Jan (author), Wong, W.J. (author), Li, Sai Chung Simon (author), Málaga-Chuquitaype, Christian (author)
This article describes a dataset used to calibrate a finite element model of a thick circular hollow section (CHS) with varying d/t (diameter to thickness) ratio under cyclic loading which may be used as a computational model validation benchmark by researchers working on similar problems in structural and mechanical engineering. The test...
journal article 2024
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Masfara, La ODE Marzujriban (author), Weemstra, C. (author)
The Hamiltonian Monte Carlo algorithm is known to be highly efficient when sampling high-dimensional model spaces due to Hamilton's equations guiding the sampling process. For weakly non-linear problems, linearizing the forward problem enhances this efficiency. This study integrates this linearization with geological prior knowledge for...
journal article 2024
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Veltmeijer, A.V. (author), Naderloo, M. (author), Pluymakers, Anne (author), Barnhoorn, A. (author)
Induced earthquakes are still highly unpredictable, and often caused by variations in pore fluid pressure. Monitoring and understanding the mechanisms of fluid-induced fault slip is essential for seismic risk mitigation and seismicity forecasting. Fluid-induced slip experiments were performed on critically stressed faulted sandstone samples,...
journal article 2024
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Shirmohammadi, F. (author), Draganov, D.S. (author), Ghose, R. (author)
Seismic interferometry (SI) retrieves the Green function between two receiver locations using their recordings from a boundary of sources. When using sources and receivers only at the surface, the virtual-source gathers retrieved by SI contain pseudo-physical reflections as well as ghost (non-physical) reflections. These ghost reflections are...
journal article 2024
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Mulder, W.A. (author)
To estimate the depth errors in a subsurface model obtained from the inversion of seismic data, the stationary-phase approximation in a two-dimensional constant-velocity model with a dipped reflector is applied to migration with a time-shift extension. This produces two asymptotic solutions: one is a straight line, and the other is a curve....
journal article 2024
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Mohabeddine, A.I. (author), Eshaghi, Cyrus (author), Correia, José (author), Castro, José Miguel (author)
This paper presents the flexural cyclic behavior of I-shaped hot rolled steel deep sections used as beams in moment-resisting frames (MRF) featuring a carbon fiber reinforced polymer (CFRP) patch on the web through advanced finite element analysis. The main goal of the CFRP reinforcement is to increase the rotation capacity of the member...
conference paper 2024
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Shoja, Aydin (author)
Reflection seismology aims to estimate the Earth's subsurface elastic parameters for further investigation by geologists and engineers. This involves generating elastic waves using seismic sources and recording the Earth's response with receivers. The subsurface model is typically considered a combination of a background model and a short...
doctoral thesis 2023
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Arslan, O. (author)
Post-earthquake structural damage shows that out-of-plane wall collapse is one of the most prevalent failure mechanisms in unreinforced masonry (URM) buildings. This issue is particularly critical in Groningen, a province located in the northern part of the Netherlands, where low-intensity ground shaking has occurred since 1991 due to gas...
doctoral thesis 2023
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van IJsseldijk, J.E. (author)
Monitoring time-lapse changes inside the subsurface is of great significance to many geotechnical applications, such as storage of gasses in underground geological formations. Minute differences in the seismic wavefield between an initial baseline and a subsequent monitor survey have to be detected in order to observe fluid flow inside...
doctoral thesis 2023
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Balestrini, F.I. (author)
Seismic methods are widely used for the exploration of the Earth’s subsurface. While they allow higher resolution compared to other geophysical methods, their performance depends on site and geological characteristics, and the volume and type of recorded information. Additionally, data processing plays a critical role in the efficacy of the...
doctoral thesis 2023
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Panagoulias, S. (author), de Winter, C. (author), Navalkar, S.T. (author), Nernheim, A. (author)
The expansion of the offshore wind industry in areas with high seismicity has led to engineering challenges related to the design of the offshore wind turbines (OWTs). Monopiles, i.e., tubular steel piles of large outer diameter, low aspect ratio (penetration depth over outer diameter), and relatively thin pile wall, are traditionally the...
journal article 2023
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Mirra, M. (author), Gerardini, Andrea (author), Ghirardelli, Sergio (author), Ravenshorst, G.J.P. (author), van de Kuilen, J.W.G. (author)
This work presents the application of timber-based retrofitting techniques to a case-study stone masonry church featuring a wooden roof from 18<sup>th</sup> century. From the static point of view, the original roof structure presented a number of undersized structural elements, and its members were poorly or not connected among each other and...
journal article 2023
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Jansen, J.D. (author)
This note provides unregularized and regularized closed-form analytical expressions for the depletion-induced or injection-induced pre-slip Coulomb stresses in two-dimensional displaced dip-slip faults. The regularization serves to remove logarithmic singularities and jump-discontinuities in the unregularized formulation. The expressions are...
report 2023
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Mirra, M. (author), Gerardini, A. (author)
Wood-based retrofitting techniques for seismic upgrading and architectural conservation of existing buildings have found increasing application in the last decades. With reference to the in-plane seismic strengthening of existing timber floors, a particularly efficient solution consists of an overlay of plywood panels fastened to the sheathing....
conference paper 2023
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Hartstra, I.E. (author), Wapenaar, C.P.A. (author)
Previous studies indicate that scattering may pose a trade-off for the performance of seismic interferometry (SI) applications for retrieving body-wave reflections of a target reflector. While it has been demonstrated that a higher scattering strength of the overburden improves the Green's function estimated by cross-correlation SI, other...
journal article 2023
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Mulder, W.A. (author)
Finite elements with mass lumping allow for explicit time stepping when modelling wave propagation and can be more efficient than finite differences in complex geological settings. In two dimensions on quadrilaterals, spectral elements are the obvious choice. Triangles offer more flexibility for meshing, but the construction of polynomial...
journal article 2023
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Bayraktaroglu, H. (author), Gonzalez Acosta, J.L. (author), van den Eijnden, A.P. (author), Korff, M. (author), Hicks, M.A. (author)
Natural soil deposits may possess a highly anisotropic nature. The fabric anisotropy of soils which is induced during the soil formation process can lead to severe variation in field scale responses. Although the influence of fabric on the response of sands is well known and several advanced constitutive models have been developed to account for...
conference paper 2023
Searched for: subject%3A%22Seismics%22
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