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Showing 1 to 20 of 23 for “"Earthquake Ground Motions"”.
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Using Pulse R -Factors to Estimate Structural Response to Earthquake Ground Motions
… for estimating inelastic response to strong ground motions. The method applies strength reduction (R) factors determined for a simple pulse to the elastic spectrum of the ground motions to estimate inelastic response spectra. Optimal pulse shapes and durations are identified among the 24 …
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Algorithm for Spectral Matching of Earthquake Ground Motions using Wavelets and Broyden Updating
… matching algorithm that modifies the real strong ground motions in the time domain by adding wavelets adjustment to the acceleration time series. The spectral matching procedure is at its core a nonlinear problem, thus a nonlinear solving method was employed in the proposed algorithm. The Broyden …
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Seismic reliability of 3D isolated bridges accounting for spatial variability of earthquake ground motions
L'abstract è presente nell'allegato / the abstract is in the attachment
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Seismic Damage Analysis and Damage-Limiting Design for R/c Structures (Earthquake, Building, Reliability, Design)
… damage in reinforced concrete structures under earthquake ground motions is proposed. Damage is expressed as a linear combination of the maximum deformation and the effect of repeated cyclic loadings. Available static (monotonic) and dynamic (cyclic) test data were analyzed to evaluate the …
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Probabilistic capacity and seismic demand models and fragility estimates for reinforced concrete buildings based on three-dimensional analyses
… for their three-dimensional (3D) response to earthquake ground motions conditioning on spectral accelerations in the two planar directions. The fragility estimates are conducted using the demand and capacity models typically for the 3D responses. The demand models expressed in terms of drift …
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Detecting and Quantifying Damage in Buildings Using Earthquake Response Data and Capacity Curves
… inelastic behavior to occur in extreme strong ground motion events. Structural engineers rely on idealized mathematical models of the structural systems and nonlinear analysis methods to estimate the capacity of a building to resist the demand of strong earthquake ground motions. Compared to …
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2-D NON-LINEAR FINITE ELEMENT ANALYSIS OF FOLSOM DAM: SEISMICALLY INDUCED SEPARATION AND PORE PRESSURE ALONG THE SOIL-CONCRETE INTERFACE
… event has not been well understood. During a ground shaking, bonding and de-bonding action along the interface may cause significant separation of soil and concrete surfaces, and such a separation may take place at any depth along the interface creating a stability concern for the overall dam. …
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Effects of Site Response on the Correlation Structure of Ground Motion Residuals
Seismic hazard analyses require an estimate of earthquake ground motions from future events. These predictions are achieved through Ground Motion Prediction Equations, which include a prediction of the median and the standard deviation of ground motion parameters. The differences between observed …
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Development of Deep Site Specific and Reference Shear Wave Velocity Profiles in the Canterbury Plains, New Zealand
… of this study can be used for back-analysis of earthquake ground motions, forward analysis of future ground motions, full 3D physics based simulations, or to refine 3D velocity models for the region. </p>
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Considering a Seismically Active Leech River Valley Fault Zone in Southwestern British Columbia
… studies suggest at least three surface-rupturing earthquakes have exceeded a moment magnitude (M) of 6 within a proposed Leech River Valley Fault Zone (LRVFZ) within the last 9,000 years. We examine the impact of an active LRVFZ to predicted earthquake ground motions for Victoria. In a …
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ΜΕΛΕΤΗ ΤΗΣ ΣΕΙΣΜΙΚΗΣ ΣΥΜΠΕΡΙΦΟΡΑΣ ΚΑΤΑΣΚΕΥΩΝ Ο.Σ. ΣΕ ΜΟΡΦΗ ΟΜΟΙΩΜΑΤΩΝ ΥΠΟ ΚΛΙΜΑΚΑ ΚΑΘΩΣ ΚΑΙ ΣΕ ΠΡΩΤΟΤΥΠΟ ΜΕΓΕΘΟΣ ΜΕ ΤΥΠΟΠΟΙΗΜΕΝΗ ΜΟΡΦΗ
… SCALE 1:7,32 WAS TESTED UNDER SIMULATED EARTHQUAKE GROUND MOTIONS, USING THE EARTHQUAKE SIMULATOR FACILITY OF THE ARISTOTLE UNIVERSITY OF THESSALONIKI. CORRELATIONS WERE MADE BETWEEN THE EXPERIMENTAL RESULTS FROM THE PRESENT STUDY AND THOSE OBTAINED FROM A SIMILAR STUDY THAT WAS MADE IN …
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Seismic performance assessment of quasi-isolated highway bridges with seat-type abutments
… to protect civil engineering structures against earthquake hazards. For highway bridges, isolation physically decouples a bridge superstructure from its substructures resting on a shaking ground, leading to a significant reduction in the seismic forces transmitted from the superstructure to the …
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Use of Incremental Dynamic Analysis to Assess the Performance of Steel Moment-Resisting Frames with Fluid Viscous Dampers
… frames with fluid viscous dampers subjected to earthquake ground motions. The study systematically investigated the effects of linear and nonlinear dampers on the response of steel moment-resisting frames to earthquakes that varied in intensity and type. Both near-field and far-field motions …
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Probabilistic Assessment of Non-Ductile Reinforced Concrete Frames Susceptible to Mid-America Ground Motions
The infrequent nature of earthquakes in the Central and Eastern United States (CEUS), and the fact that none with intensity comparable to the New Madrid sequence of 1811 12 or the Charleston earthquake of 1886 has occurred in the past century, have caused the earthquake hazard in the region to be …
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Active tectonics and earthquake hazards in continental mountain ranges and foreland basins
… active mountain belts are exposed to significant earthquake hazard, since the range-bounding faults produce large earthquakes, and the underlying geological structure amplifies the resulting ground shaking. The aim of this dissertation is to investigate the regional-scale controls on earthquake …
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Development and implementation of a multi-axial real-time hybrid simulation framework
… evaluation of structural systems subjected to earthquake loading with rate-dependent behavior. To assess the response of structural components with multi-axial loading, a loading assembly with multiple parallel actuators connected to a rigid moving platform is required to impose realistic …
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Development of Computational Tools for Characterization, Evaluation, and Modification of Strong Ground Motions within a Performance-Based Seismic Design Framework
One of the most difficult tasks towards designing earthquake resistant structures is the determination of critical earthquakes. Conceptually, these are the ground motions that would induce the critical response in the structures being designed. The quantification of this concept, however, is not …
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Seismic isolation of buildings for vertical earthquake excitations
… isolation mechanism for vertical component of earthquake. The vertical component of earthquake can be stronger and more destructive than the horizontal component in near-fault areas, for instance, Christchurch earthquake in New Zealand in 2011 or Bam earthquake in Iran in 2003. Therefore, this …
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Wavelet-Based Characterization and Stochastic Modelling of Pulse-like Ground Motions on the Time-frequency Plane
… the representation and simulation of pulse-like earthquake ground motions (PLGMs), capable to accurately represent peak elastic and inelastic structural responses, is proposed in this work. Further, the model is employed for assessing the performance of several time-frequency representation …
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Investigation of Modular Cross-Laminated Timber Rocking Walls and Rocking Wall -- Light-Frame Shear Wall Dual Systems for Seismic Resilience
… the archetype building performance to different earthquake ground motions. Monte Carlo sampling was used to capture material variability, and a mixed-effects logistic regression models was used accounted for record-to-record variability in predicting wall toe damage probability. Results …
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