Results 241 to 250 of about 10,954,160 (279)

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.
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Decomposition and Effects of Pulse Components in Near-Field Ground Motions

Journal of Structural Engineering, 2010
Long-period pulse components in near-field ground motions have been known to cause significant damage to flexible structures. In this paper, an empirical mode decomposition (EMD) approach is used to identify and separate the dominant pulse, high-frequency, and long-period components in near-field ground motions.
Zhou Xu, Anil Agrawal
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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
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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
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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
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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
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Response of buildings to near-field pulse-like ground motions

Earthquake Engineering & Structural Dynamics, 1999
Ground motions affected by directivity focusing at near-field stations contain distinct pulses in acceleration, velocity, and displacement histories. For the same Peak Ground Acceleration (PGA) and duration of shaking, ground motions with directivity pulses can generate much higher base shears, inter-storey drifts, and roof displacements in high-rise ...
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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
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GENERATION OF UNIFORM HAZARD EARTHQUAKE ACCELEROGRAMS AND NEAR-FIELD GROUND MOTIONS

Journal of Earthquake and Tsunami, 2012
The sets of records developed for the SAC Steel Project are classified according to the level of seismic hazard and specific geographic region, and have been used extensively for structural response and seismic hazard analyses. This study presents a parametric analysis of these record data sets for generation of uniform hazard earthquake and near-field
A. A. FATEMI, A. BAGHERI, G. GHODRATI AMIRI, M. GHAFORY-ASHTIANY   +3 more
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Experimental investigation of seismic performance of shield tunnel under near-field ground motion

Structures, 2022
Ys Yang, Yong Yuan
exaly