Showing papers in "Soil Dynamics and Earthquake Engineering in 1992"

TL;DR: In this article, the authors describe numerical simulation of the SASW test and evaluate the influence of the test setup and applied filtering criteria on the accuracy of the obtained field dispersion curve for various soil stratification conditions.

TL;DR: In this paper, the significance of the peak ground acceleration-to-velocity (A/V) ratio as a parameter to indicate the dynamic characteristics of earthquake ground motions was investigated, and an example to incorporate this ratio into the specification of seismic design forces for building structures was illustrated.

TL;DR: In this article, the scattering and diffraction of plane SV waves underground, circular, cylindrical cavities at various depths in an elastic half space is studied, where the cavities, studied here, are at depths of two to five cavity radii measured from the surface to the center of the cavity.

TL;DR: Theoretical methods for estimating the dynamic response and predicting the performance of modern rockfill dams subjected to strong earthquake shaking are reviewed in this article, where the focus is on methods accounting for nonlinear material behavior, for 3-dimensional canyon geometry, and asynchronous base excitation.

TL;DR: In this article, strong motion data were used to study attenuation characteristics of horizontal peak acceleration, velocity and displacement, and the resulting equations are:==================�γαρατραγατατετερακατητεγεκτεκετακταγεγδεκηγεβεκαγηκεγακεδδών ag = 3·88 + 1·12Ms − 1·

TL;DR: The parameters of a time-varying Kanai-Tajimi earthquake model can be estimated from a target earthquake record or they can be directly associated with characteristic earthquake features such as predominant frequency and frequency bandwidth.

TL;DR: In this article, the influence of plasticity index on the liquefaction potential of silty soil of low plasticity (PI of 1·7 to 3·4) has been studied in detail.

TL;DR: In this paper, a review of the various forms of reference model adopted for studies that evaluate inelastic seismic torsional effects and assess their implications for building design is presented.

TL;DR: In this paper, the effects of dynamic interaction between the tower and the supporting soil-foundation system were investigated for two-dimensional x-braced elevated tanks supported on isolated footings.

TL;DR: In this paper, the authors compared with theoretical predictions based on the approach of the dynamic interaction factors using frequency response curves of stiffness, damping and displacement amplitude of the pile group, the influence of pile-soil-pile interaction and the frozen soil layer on the dynamic behaviour of the group were studied.

TL;DR: In this paper, the effects of the depth of the embedment on the system response, under plane-strain conditions, have been studied for buildings supported by rigid circular foundations embedded into a homogeneous, isotropic and elastic half-space.

TL;DR: In this article, a detailed parametric study of torsional coupling in earthquake-excited asymmetric buildings including the effects of soil-structure interaction is made, and the authors assess the changes in the lateral-torsional earthquake response of such structures in relation to rigidly based buildings, and make appropriate comparisons with current codified seismic provisions for coupling effects by empirical design procedures based on rigid base analysis of asymmetric building.

TL;DR: In this paper, a one-dimensional scalar-valued and a two-dimensional vector-valued maximum softening damage indicator are defined, which measure the maximum relative stiffness reduction caused by stiffness and strength deterioration of the actual structure.

TL;DR: In this article, a thin layer element method is formulated to compute the dynamic response of submerged soil, which is based on Biot's equation describing the dynamic behavior of fluid-saturated elasto-porous medium.

TL;DR: In this paper, the amplitude-distance attentuation equations used in M STA definitions are compared with those used in strong motion accelerograms within 150 km from the epicenter of an earthquake.

TL;DR: In this paper, the theoretical background and capabilities of a program for stochastic analysis of reinforced concrete, under seismic excitation with emphasis on the analysis of stiffness degradation due to severe plastic deformations, are presented.

TL;DR: In this paper, a method for replacing the Poissonian probability by more general and realistic probability functions to be used in the calculations of the uniform risk functionals is presented, where the earthquake recurrences of a given size are always assumed to be Poissoni.

TL;DR: In this article, the overall trends of peak amplitudes of strong motion acceleration, velocity and displacement versus site intensity in the Western United States are consistent with our previous inferences, but the larger present data base allows us to begin with identification of the additional changes of average peak amplitude also in terms of the local soil and local geologic site conditions.

TL;DR: In this article, the authors provide analytical procedures for determining the weighting coefficients based on either mode shapes or finite elements, which can be applied to one-dimensional structure to simplify the presentation.

TL;DR: In this paper, the one-dimensional column and borehole problems of soil mechanics formulated on the basis of the poroelastic theory of Vardoulakis and Beskos are solved analytically-numerically.

TL;DR: In this paper, a numerical procedure for the analysis of Rayleigh waves in saturated porous elastic media is proposed by use of the finite element method, where the layer stiffness matrix, the layer mass matrix and the layer damping matrix in a layered system are presented for the discretized form of the solid-fluid equilibrium equation proposed by Biot.

TL;DR: In this article, a model for wave propagation in a layered media and compared the derived transfer function for transmitted and reflected waves with those for ARMA processes is presented, showing that the ARMA behavior of records is due to the transmission path with source acting as a modulating function (envelope function).

TL;DR: In this article, a finite element viscoplastic computation is proposed where the strain dependent nonlinear stiffness matrix represents plasticity effects and a general nonlinear strain-rate dependent damping matrix accounts for the overall viscous loss.

TL;DR: In this paper, the authors considered a chimney of moderate height (110 meters) founded directly on a sedimentary rock layered half space and another very tall chimney (230 meters), founded by means of short prefabricated piles on a deep, very soft, sand deposit.

TL;DR: In this paper, an analytical model of a soil layer resting on a halfspace with vertically propagating shear waves is studied under a harmonic excitation on the surface, where the soil is treated as a Kelvin-Voigt continuum, using the one-dimensional wave equation.

TL;DR: In this paper, an extended Kalman filtering technique is applied to identify the bilinear model parameters of soil restoring forces during strong shaking, and a systematic identification method is proposed to identify hysteresis behavior of soil deposits.

TL;DR: In this article, the seismic hazard in the Taiwan area is presented in terms of an iso-acceleration map for return periods of peak ground acceleration of 225 years and 475 years.

TL;DR: In this article, an approximate analysis of the soil stiffness on a single vibrating pile in vertical, torsional and lateral modes of vibration is extended to that on a pile belonging to a pile-group.

TL;DR: In this paper, a three-dimensional dam-reservoir system under seismic load is analyzed, where the most significant parameters are: the direction and frequency content of the seismic input; the radiation damping at the reservoir bottom; and the compressibility of the fluid.