Showing papers in "Soil Dynamics and Earthquake Engineering in 2010"

TL;DR: In this article, the authors present the most recent methods developed for selecting an appropriate set of records that can be used for dynamic analysis of structural systems in the context of performance-based design.

TL;DR: Soil-structure interaction is an interdisciplinary field of endeavor which lies at the intersection of soil and structural mechanics, soil-and structural dynamics, earthquake engineering, geophysics and geomechanics, material science, computational and numerical methods, and diverse other technical disciplines as discussed by the authors.

TL;DR: In this article, the authors investigated the mechanical behavior of buried steel pipelines, crossing an active strike-slip tectonic fault, where the fault is normal to the pipeline direction and moves in the horizontal direction, causing stress and deformation in the pipeline.

TL;DR: In this article, an extensive parametric study on the inelastic response of eight reinforced concrete (RC) planar frames which are subjected to forty five sequential ground motions is presented. And it is concluded that the ductility demands of the ground motions can be accurately estimated using appropriate combinations of the corresponding demands of single ground motions.

TL;DR: In this article, a 2.5D boundary integral equation is used for the analysis of ground vibrations induced by railway traffic, where the finite element method is combined with a boundary element method.

TL;DR: In this article, the authors investigated the importance of seismic soil-structure interaction in three-dimensional lined tunnels, assuming inelastic material behaviour for both the concrete liner and the soft rock type of soil.

TL;DR: In this paper, the authors evaluated the relevance of the non-linear behavior of the soil on the track response and the validation of a methodology, which includes these effects through an equivalent linear analysis.

TL;DR: In this article, a series of shaking table tests were conducted on scaled utility tunnel models with and without construction joints under non-uniform input earthquake wave excitation, and the experiments were conducted in three phases.

TL;DR: In this paper, a semi-analytical methodology for a nonlinear stress-strain analysis of buried steel pipelines at active fault crossings is presented and verified, taking into account material and large displacement nonlinearities, nonlinear pipe-soil interaction.

TL;DR: In this paper, an efficient numerical approach for determining the time domain response of a non-linear system to an arbitrary excitation is proposed, based on the Grunwald-Letnikov representation of a fractional derivative and on the well known Newmark numerical integration scheme for structural dynamic problems.

TL;DR: In this paper, the authors presented ductility demand spectra for single degree of freedom (SDOF) systems under multiple near and far-fault seismic ground motions and quantified the seismic sequence effect directly into ductility demands.

TL;DR: The average velocity of shear waves in the top 30 m of soil, νL, has become the parameter used by many engineering design codes and most recently by published empirical scaling equations to estimate the amplitudes of strong ground motion.

TL;DR: In this article, the seismic performance of typical reinforced concrete (RC) existing framed structures designed for gravity loads only was assessed. And the authors proposed buckling restrained braces (BRBs) placed along the perimeter frames of the multi-storey building to absorb a large amount of hysteretic energy under earthquake ground motions.

TL;DR: In this paper, the authors present the constitutive relations and the simulative potential of a new plasticity model developed mainly for the seismic liquefaction analysis of geostructures.

TL;DR: In this article, multi layer perceptron neural network (MLPNN), RBFNN and GRNN were utilized to predict ground vibration level in a Sarcheshmeh copper mine, Iran.

TL;DR: In this paper, the effects of soil-structure interaction (SSI) on RC-MRFs were studied using the direct method and the results led to a criterion indicating that considering SSI in seismic design, for buildings higher than three and seven stories on soil with V s V sV s

TL;DR: In this article, a general and fully three dimensional multi-body-finite element-boundary element model is used to study vibrations due to train passage on ballast and non-ballast tracks.

TL;DR: In this paper, a modified kinematic hardening constitutive model is developed and encoded in ABAQUS through a user-defined subroutine, and the retaining walls are analyzed at model scale, assuming model parameters appropriate for very small confining pressures.

TL;DR: In this article, the authors proposed a novel local time-domain transmitting boundary for cylindrical elastic wave radiation problem, which is a mechanical model consisting of the spring, dashpot and mass elements, with the auxiliary degrees of freedom introduced.

TL;DR: In this article, an elaborate program of monotonic and cyclic triaxial laboratory tests on mixtures of sand and silt with fines content 0, 15% and 25% was performed to investigate the effect of density, consolidation stress and non-plastic fines on the liquefaction strength.

TL;DR: In this paper, a moving average filter with appropriate cut-off frequency has been used to decompose the near-fault ground motions into two components having different frequency contents: Pulse-Type Record (PTR) that possesses long-period pulses; and relatively high-frequency Back Ground Record (BGR), which does not include large velocity pulses.

TL;DR: The 3D structure of the Mygdonian sedimentary basin (N. Greece) is investigated in this article, where the geometry and dynamic properties of the soil layers were inverted using data from microtremor array measurements, seismic refraction profiles, boreholes, and geotechnical investigations.

TL;DR: Taiebat et al. as discussed by the authors proposed a 3D finite element framework for modeling the propagation of seismic wave propagation in uniform and layered porous media, and applied it in the seismic response of saturated porous media.

TL;DR: In this article, the kinematic seismic interaction of single piles embedded in soil deposits is evaluated by focusing the attention on the bending moments induced by the transient motion, which is performed by modeling the pile like an Euler-Bernoulli beam embedded in a layered Winkler type medium.

TL;DR: In this article, the authors analyzed the ground motion characteristics of both the main shock in terms of peak ground acceleration, peak ground velocity (PGV), and pseudo-acceleration response spectra (5% of damping ratio).

TL;DR: In this article, the effects of overturning moment and vertical acceleration on axial load variation at the bearings are considered and the efficiency of the isolation system is investigated by analyzing the effect of various parameters such as; (i) isolation period, (ii) tank aspect ratio and coefficient of friction.

TL;DR: In this paper, the authors conducted cyclic triaxial tests on inflow and outflow ash samples collected from two different ash ponds and found that the influence of various factors on liquefaction susceptibility of both the types of ashes is similar to that of natural sands.

TL;DR: In this article, it was shown that the recorded loads were larger than prescribed by Eurocode 8 for the site even though the magnitude and location of the earthquake was as expected, the main reason was a near-fault pulse which is not covered in the code.

TL;DR: In this paper, the numerical seismic response of liquid storage tanks isolated by bilinear hysteretic bearing elements is investigated under long-period ground motions in this research, and the authors concluded that with the installation of this type of base-isolation system, the dynamic response of tanks during seismic ground motions can be considerably reduced.