Showing papers in "Soil Dynamics and Earthquake Engineering in 2000"

TL;DR: In this article, the propagation and attenuation characteristics of various source generated vibrations were investigated by analyzing particle motions, and the measured attenuation data matched well with the predicted data when using the suggested geometric damping coefficient, and estimated soil damping ratios were quite reasonable taking soil type of the site and experiencing strain level into consideration.

TL;DR: In this article, measurements of ground vibration caused by vibratory sheetpile driving in recent soil deposits are reported in terms of particle velocities vs. distance from the source of vibration.

TL;DR: In this paper, the authors describe the process of construction of the 2D model of Volvi's geological structure and results of empirical and theoretical approaches to the evaluation of site response at Euroseistest.

TL;DR: In this paper, the authors deal with the numerical modelling of free field traffic-induced vibrations during the passage of a vehicle on an uneven road, where the road unevenness subjects the vehicle to vertical oscillations that cause dynamic axle loads.

TL;DR: In this article, the displacement responses of a simulated tall building are measured clearly and accurately in real-time using the Global Positioning System (GPS) technology with high sampling rates (∼10 samples per second).

TL;DR: In this article, a boundary element model is proposed for the analysis of seismic site effects in the center of Nice on the French Riviera and the results are compared with real earthquakes and micro-tremor measurements.

TL;DR: In this article, the authors describe the interdependency between several seismic acceleration parameters and the behavior of reinforced concrete frame structures in the form of correlation coefficients, and the structural behavior is expressed in form of overall structural damage indices.

TL;DR: It is found that in many cases, where the hazard is influenced by more than one seismic source, it is impossible to define a single earthquake scenario that is compatible with the results of probabilistic seismic hazard assessment.

TL;DR: In this paper, a numerical study on the influence of a number of structural design parameters on the fundamental frequency of reinforced-soil retaining wall models is presented and discussed, including the wall height, backfill width, reinforcement stiffness, reinforcement length, friction angle and toe restraint condition.

TL;DR: In this paper, the seismic stability of slopes reinforced with geosynthetics is analyzed within the framework of the pseudo-static approach, and a suitable procedure based on the assessment of earthquake-induced permanent displacement is proposed for the design of reinforced slopes in seismically active areas.

TL;DR: In this article, two detailed ambient vibration surveys of a 7-story reinforced concrete building in Van Nuys, California, were conducted after the building was severely damaged by the 17 January 1994, Northridge earthquake (ML=5.3, epicenter 1.5 km west from the building site) and its early aftershocks.

TL;DR: In this article, the authors presented results of numerical modeling of site response for Euroseistest in a very detailed model of the subsoil of this valley has been simulated for vertically incident SH waves.

TL;DR: In this paper, a simple finite element (FE) procedure for the solution directly in the time domain of transient soil-structure-interaction (SSI) problems is proposed.

TL;DR: In this paper, a method for the development of earthquake intensity-damage relations, given as fragility curves and damage probability matrices, is proposed, applied on reinforced-concrete frame-wall structures.

TL;DR: In this article, the amplitude of vertical ground surface vibrations generated by impact tests on the ground surface was measured at various radial distances from the point of impact at locations of Greece, and the results of measurements were analyzed in the frequency domain (in the range from 0-100 Hz) and the attenuation characteristics of soil materials were studied in terms of a frequency-independent attenuation coefficient, a 0, of the empirical Bornitz equation.

TL;DR: In this paper, major developments in geotechnical earthquake engineering practice over the last 15 years are reviewed The objectives of the review are to present a coherent view of the current state of practice at the highest level and to examine trends, which may shape practice in the future.

TL;DR: In this article, the authors simulate near source strong motions of a pure shear wave and synthesize small motions, using the parameters based on the recorded accelerograms at the site that is regarded as a base rock in the Osaka basin, Japan.

TL;DR: In this article, two amplified frequencies obtained by the HVSR method appear on about 60 sites and are interpreted as the fundamental frequency of the soft thin topmost layer which in some cases amplifies the surface ground motion more than the rest of the soil column.

TL;DR: In this paper, the authors use earthquake intensity in place of physical ground motion parameters such as peak ground acceleration, spectral acceleration, and so on, to predict future levels of damage.

TL;DR: In this article, a preliminary evaluation based on Seed et al. empirical procedures for Holocene-age data showed that based on the low blowcount the formation was liquefiable, and that foundation retrofitting was in order.

TL;DR: In this paper, the authors analytically examined the horizontal vibration of a rigid disk on a saturated poroelastic half-space and derived the pressure-solid displacement form of the harmonic equations of motion for asymmetric dynamic problem.

TL;DR: In this paper, a well controlled experiment was carried out on a shallow foundation resting on a dry coarse Leighton Buzzard sand, which was subjected to a vertical eccentric load and to a sine dwell-type acceleration transmitted from a shaking table over which the shear stack was located.

TL;DR: In this paper, the authors focus on the problem of reducing scatter in the response calculated from time-history analysis using natural records, by proper scaling of these records, and propose two ground motion data sets from two different seismotectonic environments, each one evenly distributed with respect to rock and alluvia sites.

TL;DR: In this paper, a new solution based on the pseudo-static equilibrium of the soil-wall system is presented, which takes into account the effect of the presence of the wall and it is applied to soil wall systems with surcharged backfills.

TL;DR: In this article, two modelling approaches for the analyses of half-space and train-track embankment on halfspace subjected to dynamic loads are presented and compared and the comparison between the results of the presented approaches points out whether a problem can be treated as a 2D or a 3D case.

TL;DR: In this paper, the authors estimate the range of variation of τ for usually constructed reinforced concrete elevated water tanks with frame-type stagings for assessing their torsional vulnerability and derive closed-form expressions for torsion and lateral stiffness of tank stagings.

TL;DR: In this article, the authors used seismic vertical array measurements (input-output data sets) using both time-invariant and time-variant parametric modeling methods (system identification) to estimate dynamic properties of the soils at the Lotung test site, Lotung, Taiwan.

TL;DR: In this paper, the authors investigated the efficacy of using energy dissipating restrainers at expansion joints for preventing collapse of highway bridges in the event of a severe earthquake, and demonstrated that the restrainers are effective in reducing the relative opening displacements and impact forces due to pounding at the expansion joints, without significantly increasing ductility demands in bridge substructures.

TL;DR: In this article, the authors compared the results of these two sets of observations and found that there is no simple correlation between these two set of observations, and that the results showed that there are no simple correlations between the two sets.

TL;DR: In this article, the authors conducted paleoseismic investigations in the Roer Graben to evaluate the long-term seismicity in this part of Europe (maximal magnitude and return period) in the framework of seismic hazard assessment.