Results 251 to 260 of about 4,834,953 (288)

The Vertical and Horizontal Spectra of Near-Fault Ground Motions

Applied Mechanics and Materials, 2012
Based on the horizontal and vertical components of a set of 30 acceleration records obtained from 10 near-fault earthquakes, the horizontal and the vertical response spectra are established, and have been compared with each other in this study. Statistical analyses show that, for the selected 30 acceleration records, the maximum mean of vertical ...
Jiang Yin, Xian Yan Zhou, Guo Jing He
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Near-Fault Ground Motion Effects on Simple Structures

Journal of Structural Engineering, 2001
Ground motion records obtained from sites at known locations relative to earthquake faults were used to study near-fault (NF) ground shaking effects on the inelastic response of simple structures. The structures were idealized as single-degree-of-freedom oscillators with periods ranging from 0.05 to 3.0 s, a damping ratio of 2%, and target ductilities ...
Gregory A. MacRae, Daniel V. Morrow, Charles W. Roeder   +2 more
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A vector‐valued intensity measure for near‐fault ground motions

Earthquake Engineering & Structural Dynamics, 2020
SummaryNear‐fault ground motions containing high energy and large amplitude velocity pulses may cause severe damage to structures. The most widely used intensity measure (IM) is the elastic spectral acceleration at the fundamental period of the structure (Sa(T1)); however, Sa(T1) is not a sufficient IM with respect to the effects of the pulse‐like ...
Esra Zengin, Norman A. Abrahamson
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Representation of near-fault pulse-type ground motions

Earthquake Engineering and Engineering Vibration, 2005
Near-fault ground motions with long-period pulses have been identified as critical in the design of structures. To aid in the representation of this special type of motion, eight simple pulses that characterize the effects of either the fling-step or forward-directivity are considered.
Lili Xie, Longjun Xu, Rodriguez-Marek Adrian   +2 more
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Residual slip of sliding blocks induced by near‐fault ground motions

Earthquake Engineering & Structural Dynamics, 2016
SummaryThe response of a rigid block supported on a horizontally moving foundation through a dry‐friction contact is investigated to near‐fault ground motions. Such motions can be thought of as consisting of a coherent component (‘pulse’) and an incoherent component, which can be described as a band‐limited ‘random noise’.
Meza Fajardo, Kristel Carolina, Papageorgiou, Apostolos   +1 more
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Damping coefficients for near-fault ground motion response spectra

Soil Dynamics and Earthquake Engineering, 2011
Abstract Damping coefficients are frequently used in earthquake engineering as a simple way to adjust the pseudo-acceleration or displacement response spectra associated with a viscous damping ratio of 5% to the higher values of viscous damping needed for design of structures equipped with base isolation and/or supplemental energy dissipation devices.
Derek T. Hubbard, George P. Mavroeidis
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Simulation of Near Fault Ground Motion in Delhi Region

2014
Ground motions in the vicinity of the source caused severe damage to structures as evidenced during the past earthquakes (Loma Prieta 1989; Kobe 1995; Chi-Chi 1999). Near fault ground motions are characterized by long period velocity pulse as reported in literature (Somerville, 2005).
Hemant Shrivastava, G. V. Ramana, A. K. Nagpal   +2 more
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Near-fault fling-step ground motions: Characteristics and simulation

Soil Dynamics and Earthquake Engineering, 2017
Abstract The presence of long-period pulses in the near-fault pulse-type ground motions increases the damage potential of such ground motions, particularly for the flexible structures like bridges. It is necessary to carry out nonlinear analyses of structural systems for ensuring their safety in the near-source regions.
Kshitij K. Yadav, Vinay K. Gupta
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Multifractal characteristic analysis of near-fault earthquake ground motions

Soil Dynamics and Earthquake Engineering, 2015
Abstract This study aims to reveal the multi-scaling behavior and quantify the irregularity of near-fault earthquake ground motions from a new perspective of multifractal theory. Based on multifractal detrended fluctuation analysis, the multifractal characteristic parameters of acceleration time series for typical near-fault ground motions are ...
Dixiong Yang, Changgeng Zhang, Yunhe Liu
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Characterization of forward-directivity ground motions in the near-fault region

Soil Dynamics and Earthquake Engineering, 2004
Abstract Ground motions close to a ruptured fault resulting from forward-directivity are significantly different than other ground motions. These pulse-type motions can place severe demands on structures in the near-fault region. To aid in the characterization of these special type of ground motions, a simplified parameterization is proposed based on
Jonathan D. Bray, Adrian Rodriguez-Marek
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