Showing papers in "Soil Dynamics and Earthquake Engineering in 2004"

TL;DR: In this article, a simplified parameterization is proposed based on a representative amplitude, pulse period, and number of significant pulses in the velocity-time history to estimate the peak ground velocity and period of the velocity pulse (Tv) of available forward-directivity motions.

TL;DR: In this paper, a series of undrained monotonic and dynamic triaxial compression tests were conducted on reconstituted saturated samples of Ardebil sand with variation in fines content from 0 to 100, using two types of test specimens; sand and silt mixed throughout the specimen and specimens with alternating sand-silt layers.

TL;DR: In this article, a fault segmentation model for the Marmara Sea is presented, which is based on a simple Poissonian and time-dependent probabilistic (renewal) model.

TL;DR: In this article, the effect of soil-structure interaction on elastic and inelastic range responses of low-rise building frames due to seismic excitations has been examined in details.

TL;DR: A series of isotropic consolidation, undrained monotonic and cyclic triaxial tests were conducted on reconstituted Mai Liao Sand (MLS) with various FCs and densities.

TL;DR: In this article, undrained triaxial compression tests were performed on specimens composed of Nevada sand with 20% non-plastic silt content using a variety of depositional methods that include slurry deposition, water sedimentation, air pluviation, mixed dry deposition, and dry funnel deposition.

TL;DR: In this article, three methods that follow the general format of the Seed-Idriss simplified procedure for evaluating liquefaction resistance of soils are compared by constructing relationships between penetration resistance and small-strain shear-wave velocity (V S ) implied from cyclic resistance ratio (CRR) curves for the three methods, and by plotting penetration- V S data pairs.

TL;DR: In this article, a three-dimensional method of analysis is presented for the seismic response of structures constructed on pile foundations, where a subsystem model consisting of a structure subsystem and a pile-foundation subsystem is used.

TL;DR: In this article, an experimental comparative study of three different grouted sands in terms of their effects on the values of two dynamic properties is presented, the dynamic properties studied are the shear modulus and the damping ratio which are determined with resonant column tests and cyclic triaxial tests.

TL;DR: In this article, the authors explored the magnitude and distribution of dynamic earth pressures on several types of flexible retaining systems: L-shaped reinforced-concrete walls, piled walls with horizontal or with strongly inclined anchors, and reinforced-soil walls.

TL;DR: In this paper, a series of experiments are reported to evaluate the effect of soil-structure interaction in estimates of site response in the presence of tall buildings, and an experiment on the frequency change due to damage was performed.

TL;DR: In this article, a multi-channel analysis of surface wave (MASW) method is developed to estimate shear wave velocity profile from surface wave energy. But unlike conventional SASW method, multi-station recording permits a single survey of a broad depth range and high levels of redundancy with a single field configuration.

TL;DR: In this paper, the response of fixed offshore platforms supported by clusters of piles is investigated and the soil resistance to the pile movement is modelled using dynamic p- y curves and t- z curves to account for soil nonlinearity and energy dissipation through radiation damping.

TL;DR: In this paper, a honeycomb wave impeding barrier (WIB) is proposed to mitigate the low-frequency vibrations from a train viaduct over an anticipated range and its effects are investigated by computer simulation.

TL;DR: In this paper, a detailed study of the behavior of inclined micropiles under seismic loading is carried out using a full three-dimensional finite element modeling, in which the soil media is assumed to be elastic with Rayleigh damping, while micropils are modeled as 3D elastic beam elements.

TL;DR: In this paper, a random effects model that takes into consideration the correlation of data recorded by a single seismic event is employed to develop empirical attenuation relationships for the geometric mean of horizontal peak ground acceleration and 5-percent damped spectral acceleration.

TL;DR: In this paper, an empirical relationship with good correlation was established between peak particle velocity and scale distance for a limestone quarry located in Istanbul, Turkey, where ANFO (blasting agent), gelatine dynamite (priming) and NONEL detonators (firing) were used as explosives at this site.

TL;DR: In this paper, the adaptive neuro-fuzzy inference system (ANFIS) was employed to predict the shear modulus and the damping coefficient of the sand samples as an alternative to lengthy laboratory testing.

TL;DR: In this article, the Biot's theory of dynamics in saturated poroelastic soils has been applied to analyze the influence of the velocity of moving load and the pore material parameters on the stresses and excess pore pressure induced by a concentrated line load.

TL;DR: In this article, the results of performed cyclic and dynamic torsional tests show that small strain shear modulus is only moderately affected by cyclic prestraining even if high amplitudes are applied.

TL;DR: In this paper, the authors document results from several large site investigation programs conducted in Nantou, Wufeng and Yuanlin, Taiwan, including cone penetration testing (some with pore pressure and shear wave velocity measurements) and rotary wash borings with standard penetration testing.

TL;DR: In this article, the authors compared these rockburst induced ground motions with low intensity earthquakes and concluded that although short duration is the most obvious parameter that differentiates rockbursts from earthquakes, in fact their high dominant frequencies, which result in high PGA/PGV ratios differentiate them the most.

TL;DR: In this article, the seismic response analysis of a base-isolated liquid storage tank on a half-space was examined using a coupling method that combines the finite elements and boundary elements.

TL;DR: Methods based on multi-station recordings are presented for constructing the experimental dispersion curve of Rayleigh waves, and a method based on the linear regression of phase angles measured at multiple stations is introduced for determining data quality and filtering criteria.

TL;DR: In this paper, dynamic centrifuge tests were performed on saturated model embankments made of loose completely decomposed granite (CDG) to investigate the seismic stability and potential flow liquefaction of loose fill slopes.

TL;DR: In this paper, the authors investigated the deformation behavior of silt-clay mixtures encountered at the sites with significant foundation displacements through a series of standard and rapid monotonic, and stress-controlled cyclic triaxial tests conducted over anisotropicically consolidated natural soil samples.

TL;DR: In this paper, the spatial autocorrelation method was used to determine phase velocity dispersion curves in the frequency range from 0.8 − 1.5 to 6 − 7 Hz.

TL;DR: In this article, the Direct Boundary Element Method (DBEM) is presented to solve the elastodynamic field equations in 2D, and a complete comprehensive implementation is given.

TL;DR: In this paper, the authors present the results of a relatively comprehensive suite of site response studies (2153 site response analyses), performed using carefully selected suites of site conditions and input time histories, to provide an improved basis for development of estimates of in situ cyclic shear stress ratio using the rd-approach.

TL;DR: In this paper, the authors carried out an extensive investigation of soil liquefaction in the 1999 Chi-Chi, Taiwan earthquake, which caused severe ground settlement and structure damages.