Results 251 to 260 of about 10,126,981 (288)

Stochastic geologic effects on near-field ground motions in alluvium

Bulletin of the Seismological Society of America, 1988
Abstract Analysis of accelerograms recorded at the 20 m range from a buried 5-lb detonation in alluvium revealed wide (as large as 20 dB in the amplitude modulus of the Fourier transform) variations in response for frequencies above 35 Hz. Additional experiments were performed which ruled out source asymmetry or instrumental irregularity
Robert E. Reinke, Brian W. Stump
openaire   +1 more source

Calculations of Near Field, Earthquake Ground Motion

1973
Abstract : A stick-slip rupture model has been incorporated into a two- dimensional (plane strain) Lagrangian code with the added feature that rupture initiation is plastic work dependent. Realistic laboratory test data have been used as input to the model.
openaire   +1 more source

Liquefaction Potential Assessment for Near Field and Far Field Ground Motion

2021
Out of the various seismic hazards, soil liquefaction is a major cause of both losses of life and damage to infrastructures and lifeline systems. For establishment of various important structures, suitable identification, evaluation and analysis of the liquefaction should be done in soil sites.
Nikhil Gupta, Ranjan Kumar, Kapilesh Bhargava   +2 more
openaire   +1 more source

Seismic isolation of cable‐stayed bridges for near‐field ground motions

Earthquake Engineering & Structural Dynamics, 2003
AbstractThis study examines the efficacy of using seismic isolation to favorably influence the seismic response of cable‐stayed bridges subjected to near‐field earthquake ground motions. In near‐field earthquake ground motions, large amplitude spectral accelerations can occur at long periods where many cable‐stayed bridges have significant structural ...
Michael J. Wesolowsky, John C. Wilson
openaire   +1 more source

Vertical ground motion in near field

2014
Two questions have puzzled seismologists in the past: if vertical peak accelerations could exceed the horizontal ones and if vertical peaks exceeding 1 g were feasible in the near field. Recordings of vertical accelerations larger than 1 g are very rare, only 7 so far (according to the Strong Motion Virtual Data Center, see Table 1). This is mainly due
M. Santulin, D. Sandron, TAMARO, Alberto, A. Rebez, M. Mucciarelli, D. Slejko   +5 more
openaire   +1 more source

Near-field ground motion from the Landers earthquake

1995
In order to investigate near-field ground motions, an important Lucerne Valley record from the Landers earthquake is studied. The Lucerne Valley record was recorded on the Kinemetrics SMA-2/EMA instrument located 2 km from the fault. Since the characteristics of the SMA-2/EMA instrument were not completely understood and the conventional data ...
openaire   +1 more source

Near-field ground motion and dynamic rupture process

2023
In order to realise the comprehensible simulations of dynamic rupture process and wave propagation, it is important to take into account of fault geometry, strses field and frictional property. Although it is always a difficult task to guess all the factors before an earthquake, there have been a lot of efforts to determine the model parameters for the
openaire   +1 more source

Predicted near-field ground motion for dynamic stress-drop models

pure and applied geophysics, 1985
We propose a finite difference method, using a hexagonal grid, to compute displacements (stresses, velocities, accelerations) in the near-field of a 2-D in-plane stress-drop crack, in both whole space (constant stress-drop) and half-space (depth-dependent stress-drop).
C -I. Trifu, M. Radulian
openaire   +1 more source

On the response of r.c. buildings to near-field ground motions

2015
This paper shows the results of a nonlinear dynamic analysis of a fixed base reinforced concrete 2D frame subjected to near-field earthquakes, i.e. seismic motions recorded close to the epicentral area of the fault rupture. In these areas both the acceleration and velocity signals are impulsive and consequently the response of the structures requires a
DIAFERIO, Mariella, FOTI, Dora
openaire   +1 more source

Reliability analysis of braced frames subjected to near field ground motions

Earthquakes and Structures, 2013
Near field ground motions have caused several structural damages in recent decades. As a result, seismic codes are being updated with related requirements. In this paper a comparative study on the seismic behavior of concentrically braced frames (CBFs) designed based on different seismic codes is performed.
Asma Sistani, Behrouz Asgarian, Ali Jalaeefar   +2 more
openaire   +1 more source