A simple, yet effective, analytical model is proposed for the representation of near-field strong ground motions. The adequately describes impulsive character near-fault motions both qualitatively and quantitatively. In addition, it can be used to analytically reproduce empirical observations that are based on available near-source records. input parameters have an unambiguous physical meaning. has been calibrated using a large number actual ground-motion It successfully simulates entire set...

Abstract In order to investigate the response of structures near‐fault seismic excitations, ground motion input should be properly characterized and parameterized in terms simple, yet accurate reliable, mathematical models whose parameters have a clear physical interpretation scale, extent possible, with earthquake magnitude. Such model for representation coherent (long‐period) components has been proposed by authors previous study is being exploited this article investigation elastic...

Summary An efficient computational framework is presented for seismic risk assessment within a modeling approach that utilizes stochastic ground motion models to describe the hazard. The based on use of kriging surrogate model (metamodel) provide an approximate relationship between structural response and parameters are considered as uncertain. character excitation addressed by assuming under influence white noise (used model) follows lognormal distribution. Once established, task involves...

Codes for aseismic design may require use of recorded ground motions as input in dynamic analysis. When records are not available, must be simulated. The specific barrier model (SBM) is particularly useful this context because (1) it provides the most complete, yet parsimonious, self-consistent description earthquake faulting processes that responsible generation high-frequency radiation; (2) has been calibrated to earthquakes three different tectonic regions; and (3) its key parameter,...

Summary This article investigates the characteristics of accidental eccentricity in symmetric buildings due to torsional response arising from wave passage effects near‐fault region. The soil–foundation–structure system is modeled as a cylinder placed on rigid circular foundation supported an elastic halfspace and subjected obliquely incident plane SH waves simulating action pulse‐like ground motions. translational computed assuming that superstructure behaves shear beam under rocking base...

The effect of fault rupture characteristics on near-fault strong ground motions is investigated using a kinematic modeling approach in an attempt to identify physical processes that lead specific ground-motion patterns. shear-stress distribution the causative plane four well-documented seismic events (i.e., 1979 Imperial Valley, 1985 Michoacan, 1989 Loma Prieta, and 1999 Izmit) calculated based slip models available literature methodology proposed by Bouchon (1997) for stress field...

Summary The design of floor isolation systems (FISs) for the protection acceleration sensitive contents is examined considering multiple objectives, all quantified in terms probabilistic system performance. competing objectives considered correspond to (i) maximization level offered content (acceleration reduction) and (ii) minimization demand isolator displacement capacity and, more importantly, appropriate clearance avoid collisions with surrounding objects (floor reduction). Both these...

Summary This article presents a simple and effective method for generating across‐fault seismic ground motions the analysis of ordinary seismically isolated bridges crossing strike‐slip faults. Based on pulse models available in literature, two loading functions are first proposed to represent coherent (long‐period) components motion across The then calibrated using actual near‐fault ground‐motion records with forward‐directivity velocity fault‐normal direction fling‐step displacement...

Abstract This article presents a comprehensive parametric study of ordinary and seismically isolated bridges crossing strike‐slip faults by performing nonlinear response history analysis using actual near‐fault ground‐motion records varying the fault angle, location, pier height, span length, seismic excitation polarity, number components. The considered ground motions include three from major earthquakes with their peak displacements pulse periods being considerably larger in fault‐parallel...

Abstract The 2008 M w 7.9 Wenchuan earthquake, one of the largest continental intraplate events instrumentally recorded, struck central part Sichuan Province in southwestern China causing great destruction and loss life but also providing a wealth seismological data, geodetic measurements, tectonic observations. earthquake ruptured two northwest‐dipping imbricate oblique reverse faults along middle segment Longmenshan fault zone—a northeast‐trending thrust belt located at boundary between...

Summary Stochastic ground motion models can facilitate a versatile description of earthquake acceleration time‐histories by modulating white‐noise sequence through functions that address spectral and temporal properties the excitation. This is established relating parameters these to site characteristics appropriate predictive relationships. study focuses on selection relationships establish direct compatibility mean predictions prediction equations (GMPEs). A record‐based model selected as...

Research Article| October 01, 2013 Finite‐Fault Simulation of Broadband Strong Ground Motion from the 2010 Mw 7.0 Haiti Earthquake George P. Mavroeidis; Mavroeidis Department Civil and Environmental Engineering Earth Sciences, University Notre Dame, 156 Fitzpatrick Hall, Indiana 46556g.mavroeidis@nd.edu Search for other works by this author on: GSW Google Scholar Christopher M. Scotti Fay, Spofford, Thorndike Engineers, Inc., 534 Broadhollow Road, Melville, New York 11747 Author Article...

The cost-effective design of seismic protective devices considering multiple criteria related to their lifecycle performance is examined, focusing on applications fluid viscous dampers. adopted framework based nonlinear time-history analysis for describing structural behavior, an assembly-based vulnerability approach quantifying earthquake losses, and characterization the hazard through stochastic ground motion modeling. probabilistic (lifecycle) quantified expected value some properly...

Research Article| March 27, 2018 Comparison of Observed and Synthetic Near‐Fault Dynamic Ground Strains Rotations from the 2004 Mw 6.0 Parkfield, California, Earthquake Yenan Cao; Cao aDepartment Civil Environmental Engineering Earth Sciences, University Notre Dame, Indiana 46556, g.mavroeidis@nd.edu Search for other works by this author on: GSW Google Scholar George P. Mavroeidis; Mavroeidis Mansoor Ashoory bDepartment Engineering, The Catholic America, Washington, D.C. 20064cNow at...

We are generating physically plausible near-field synthetic ground motions for the great 1964 Prince William Sound, Alaska, earthquake compatible with available seismological data, tectonic information, and eyewitness accounts. The first objective of this study is simulation low-frequency (i.e., f <0.03 Hz) strong on selected locations a dense grid observation points extending over shallow dipping causative fault Alaska earthquake. In order to accomplish task, we utilizing slip model...

Abstract Although previous studies have performed finite‐fault simulations of actual or hypothetical earthquakes to generate time histories near‐fault ground strains and rotations, no systematic attempt has been made assess the sensitivity these motions variations in seismic source parameters (e.g., fault type, magnitude, rupture velocity, slip hypocenter location, burial depth). Such a parametric investigation is presented this article by generating rotations at stations dense grid...