Showing papers in "Soil Dynamics and Earthquake Engineering in 2005"

TL;DR: Options for processing strong-motion accelerograms are presented, discussed and evaluated from the perspective of engineering application, to avoid errors in the interpretation and use of the results.

TL;DR: In this article, the authors present results of numerical analyses for the seismic response of step-like ground slopes in uniform visco-elastic soil, under vertically propagating SV seismic waves.

TL;DR: In this paper, a series of tests on a large centrifuge, including 40 models of shear wall footings, were performed to study the nonlinear load-deformation characteristics during cyclic and earthquake loading.

TL;DR: In this article, the influence of the track design and properties on the level of ground vibration due to a vehicle moving with subsonic speed is examined using a coupled finite element-boundary element model of track and subsoil.

TL;DR: In this article, a high-cycle constitutive model is used for the prediction of the accumulation of strain and/or stress under cyclic loading with many (thousands to millions) cycles and relatively small amplitudes.

TL;DR: In this article, a fully coupled numerical model is used to simulate the response of a buried concrete structure under subsurface blast, with emphasis on the comparative performance of 2D and 3D modeling schemes.

TL;DR: In this paper, the influence of the complexity of the soil layering on site effects in both time and frequency domain is investigated for the European test site of Volvi (Greece).

TL;DR: In this paper, the effects of inertial and kinematic forces on pile stresses are studied based on large shaking table tests on pile-structure models with a foundation embedded in dry and liquefiable sand deposits.

TL;DR: In the near field of an earthquake, the effects of the rotational components of ground motion may not be negligible compared to the effect of translational motions as discussed by the authors, which may produce unreliable results, especially in calculations of permanent displacements and long-period calculations.

TL;DR: In this paper, a finite-element method of solution was developed to investigate parametrically the effects of flexural wall rigidity and the rocking base compliance on rigid and flexible retaining walls against earthquakes.

TL;DR: In this paper, surface displacements, surface strain, rocking, and energy partitioning during reflection-of-plane waves in a fluid-saturated poroelastic half-space are discussed.

TL;DR: In this paper, the earthquake damage response of the concrete gravity dams is investigated with considering the effects of dam-reservoir interaction, and a continuum damage model which is a second-order tensor and includes the strain softening behavior is selected for the concrete material.

TL;DR: In this article, a neural network model is developed to predict the horizontal ground displacement in both ground slope and free face conditions due to liquefaction-induced lateral spreading, which is the one compiled by Youd and his colleagues in their revised MLR model.

TL;DR: In this article, the effect of ground motion variations with different wave propagation apparent velocities in soft and medium soil, and the influence of soil-structure interaction (SSI) on the pounding response of two adjacent bridge frames was investigated.

TL;DR: In this article, the Boundary Element Method is used to model the soil-tie system within the framework of impulse response techniques and the two methods are coupled at the tie-rail interface and the solution is obtained following a staggered, time marching scheme.

TL;DR: In this paper, the validity of the estimation of seismic site response characteristics from ambient noise measurements was investigated in the downtown district of the city of Thessaloniki (Northern Greece), which was strongly affected by the 20/6/1978 (MZ6.5) damaging earthquake.

TL;DR: In this article, the authors considered the epistemic uncertainty in ground motion prediction relations in probabilistic seismic hazard analysis (PSHA), together with the aleatory variability that is incorporated directly into the hazard calculations through integration across the log-normal scatter in the ground motion relations.

TL;DR: In this article, undrained cyclic triaxial tests were conducted on normally and isotropically consolidated saturated sands with the shear wave velocity measured intermittently by bender element during cyclic liquefaction, to study the influences of seismic cyclic loading history on small strain shear modulus G max during earthquake.

TL;DR: In this paper, the influence of spatially variable ground motions on the longitudinal seismic response of a short, three-span, 30-degree skewed, reinforced concrete highway bridge is studied.

TL;DR: In this article, the structural and geotechnical investigations of highway bridges during the recent Kocaeli and Duzce earthquakes are presented, and the results of these investigations can be taken in consideration to improve transportation infrastructure against surface rupture hazards.

TL;DR: In this paper, a detailed 2D model has been constructed and validated for Euroseistest valley, in northern Greece, to investigate what parameters, in addition to surface soil conditions, can be used to correctly characterize site response in a 2D structure.

TL;DR: In this article, a simplified method was developed to predict lateral seismic soil pressure for building walls, focusing on the building walls rather than retaining walls and specifically considering the dynamic soil properties and frequency content of the design motion in its formulation.

TL;DR: In this article, a validated numerical model is used to simulate stress wave at a granite site owing to explosion in an underground chamber, and the relations such as peak particle velocity (PPV) and principal frequency (PF) attenuation as well as spatial variation of motions on ground surface and in the free field are derived.

TL;DR: In this paper, the results of numerical analyses aimed at recovering the complete seismic response of the three underground structures are presented, with particular emphasis on Sepolia station, where the developed accelerations (with PGA of about 0.17 g at the station base and 0.43 g on the station roof) are shown to have been almost exactly equal to the design accelerations according to the seismic code under the assumption that the station responds as an aboveground structure.

TL;DR: In this article, the shear modulus of crushable volcanic soils at small strain level was investigated in bender element and cyclic undrained triaxial tests, and the results showed that the results from bender elements agree well with those determined in cyclic triaxials.

TL;DR: In this article, the authors investigated the failure mechanism of a pile-supported wharf in front of backfilled gravity type caissons during the 1995 Hyogo-ken Nambu Earthquake at Takahama, Kobe.

TL;DR: In this paper, the authors demonstrate the important role of soil stratigraphy, material heterogeneity, and soil-structure interaction on the characteristics of ground surface motion during the 1999 Athens earthquake.

TL;DR: An International Standard, ISO23469, is being developed for addressing these issues in a systematic manner within a consistent framework as mentioned in this paper, where the seismic actions are determined through two stages, the first stage determines basic seismic action variables, including the earthquake ground motion at the site, the potential for earthquake-associated phenomena such as liquefaction and induced lateral ground displacement.

TL;DR: In this article, the authors present the first results of the effort to extend the idea of test site to a larger portion of the whole sedimentary structure, i.e. the extension of the Euroseistest from a 2D to a 3D structure.