-
1241
Time Domain Implementation of Transmitting Boundaries in ABAQUS for Discrete Soil-structure Interaction Systems
Published 2020-06-01“…Most challenging aspect of seismic SSI analysis is to implement transmitting boundaries that absorb the artificial reflections of stress waves at the truncated interface of the finite and infinite domains, while allowing the seismic waves to enter the finite domain. In this paper, the time domain implementation of seismic analysis of a soil-structure system is presented using classical discrete models of structure and interactive force boundary conditions for soil. …”
Get full text
Article -
1242
Determining Attenuation Q-Factor Values for Selected Seismic Stations in Iraq
Published 2023-08-01“…The attenuation properties are important for providing information about the medium that seismic waves pass through and can also be applied to areas with seismic activity as initial disaster mitigation. …”
Get full text
Article -
1243
Seismic Response and Damage Analysis of Shield Tunnel with Lateral Karst Cavity under Oblique SV Waves
Published 2023-02-01“…The dynamic effects of the lateral karst cavity on the shield tunnels under different incident angles of seismic waves are investigated by numerical analysis in this paper, based on the Dalian Metro Line 5 project. …”
Get full text
Article -
1244
Experimental Studies Of Electrokinetic Conversions In A Fluid-Saturated Porous Medium
Published 2012“…The electrokinetic effect in a fluid-saturated porous rock is defined as the coupling and conversion between seismic and electric energies. When seismic waves propagate through a fluid-saturated formation and cause a pore fluid-flow relative to the solid matrix, the motion of the cations in the fluid- flow forms a streaming electrical current and induces an electromagnetic wave at any discontinuous interface of the formation or stationary electric potential inside the homogeneous formation. …”
Get full text
Technical Report -
1245
Estimation of ground motion during underground excavation
Published 2020“…However, blasting results in seismic waves, which influences the building structure on the Earth’s surface. …”
Get full text
Final Year Project (FYP) -
1246
Detection of underground utilities below NTU campus
Published 2023“…In this project, it focuses on seismic scattering method which uses seismic waves collected to analyze the condition of the underground. …”
Get full text
Final Year Project (FYP) -
1247
Stress drops on the Blanco Oceanic Transform Fault from interstation phase coherence
Published 2019“…The variation is caused by the generation of seismic waves at different locations along the rupture, which arrive at different times depending on station location. …”
Journal article -
1248
Effectiveness and computational efficiency of absorbing boundary conditions for full-waveform inversion
Published 2022-07-01“…<p>Full-waveform inversion (FWI) is a high-resolution numerical technique for seismic waves used to estimate the physical characteristics of a subsurface region. …”
Get full text
Article -
1249
A seismic refraction and wide-angle reflection exploration in 2002 on the Mizuho Plateau, East Antarctica-Outline of observations (JARE-43)-
Published 2003-03-01“…The obtained seismic records show the clear onsets of the first arrivals at distances of less than 100 km from each large shot. In particular, seismic waves traveling through the ice sheet and dispersed surface waves were clearly observed. …”
Get full text
Article -
1250
The 2021 Loyalty Islands Earthquake (Mw 7.7): Tsunami Waveform Inversion and Implications for Tsunami Forecasting for New Zealand
Published 2022-11-01“…This source model with an assumed rupture velocity of 1.0 km/s can reproduce the observed seismic waves. We evaluated two tsunami forecasting approaches for coastal regions in New Zealand: selecting a pre‐computed scenario, and interpolating between two pre‐computed scenarios. …”
Get full text
Article -
1251
ADI-based, conditionally stable schemes for seismic P-wave and elastic wave propagation problems
Published 2022-08-01“…We derive the condition for the stability for seismic waves; namely, we show that the method is stable when τ < C min{ hx,hy,hz}, where C is a constant that depends on the PDE problem and also on the degree of splines used for the spatial approximation. …”
Get full text
Article -
1252
Design and operation of a 1500-m laser strainmeter installed at an underground site in Kamioka, Japan
Published 2017-06-01“…The strain spectrum of the observed data for the 1500-m strainmeter indicates that the lowest background noise attained is less than 10−12 in the mHz band. Seismic waves up to 6 × 10−7 in amplitude have been observed without saturation or fringe steps. …”
Get full text
Article -
1253
Highly Energetic Electrons Accelerated in Strong Solar Flares as a Preferred Driver of Sunquakes
Published 2023-01-01“…Sunquakes are enhanced seismic waves excited in some energetic solar flares. …”
Get full text
Article -
1254
Seismic Lines in Treed Boreal Peatlands as Analogs for Wildfire Fuel Modification Treatments
Published 2020-06-01“…To delineate below-ground hydrocarbon resources using seismic waves, seismic lines are created by removing above-ground (canopy) fuels using heavy machinery, forming linear disturbances through some treed peatlands. …”
Get full text
Article -
1255
Mapping of Soil Liquefaction Associated with the 2021 Mw 7.4 Maduo (Madoi) Earthquake Based on the UAV Photogrammetry Technology
Published 2023-02-01“…The amplification of the seismic waves in the vicinity of the rupture zone enhances the liquefaction effects near it. …”
Get full text
Article -
1256
Seismological Processing of Six Degree-of-Freedom Ground-Motion Data
Published 2020-12-01“…Recent progress in rotational sensor technology has made it possible to directly measure rotational ground-motion induced by seismic waves. When combined with conventional inertial seismometer recordings, the new sensors allow one to locally observe six degrees of freedom (6DOF) of ground-motion, composed of three orthogonal components of translational motion and three orthogonal components of rotational motion. …”
Get full text
Article -
1257
Detection of seismic events on Mars: a lunar perspective
Published 2019-07-01“…Seismological investigations of planet interiors rely primarily on seismic waves excited by seismic events. Since tectonic activities are much weaker on other planets, e.g. …”
Get full text
Article -
1258
Sliding behaviors of the trapezoidal roof rock block under a lateral dynamic disturbance
Published 2024-03-01“…The surrounding rock of underground space is always affected by external dynamic disturbance from the side position, such as blasting vibration from a stope at the same level or seismic waves from adjacent strata. A series of laboratory tests, numerical simulations and theoretical analyses were carried out in this study to disclose the sliding mechanism of roof rock blocks under lateral disturbance. …”
Get full text
Article -
1259
Study on the Seismic Response of Shield Tunnel Structures with the Preload Loss of Bolts
Published 2023-11-01“…An artificial viscoelastic boundary was used to simulate the propagation of seismic waves from an infinitely distant field. This study investigated the effects of different levels of preload loss on the seismic response of shield tunnels. …”
Get full text
Article -
1260
Focused blind deconvolution of interferometric Green’s functions
Published 2020“…Note that FBD is designed for an acquisition where the noise is recorded for a longer time period than the propagation time of the seismic waves e.g., as could be done during normal drilling operations. …”
Get full text
Article