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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 184 for “"Ground Motion"”.
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Wind Induced Ground Motion
… good understanding of the mechanism of the wind-ground coupling. This thesis investigates the driving pressure and shear stress perturbations on the ground surface associated with wind-induced ground motions. A prediction of the ground displacements spectra from the measured ground properties and …
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Topographic Effects in Strong Ground Motion
Ground motions from earthquakes are known to be affected by earth's surface topography. Topographic effects are a result of several physical phenomena such as the focusing or defocusing of seismic waves reflected from a topographic feature and the interference between direct and diffracted seismic …
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A Characteristic Approach to Ground Motion Determination
Made available in DSpace on 2014-12-13T19:31:44Z (GMT). No. of bitstreams: 1 7804164.pdf: 2970760 bytes, checksum: cd3311275eed35942df83395d279c9c2 (MD5) Previous issue date: 1977
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ANALYSIS AND MODELING OF NONSTATIONARY GROUND MOTION COHERENCY
… do not consider the nonstationary character of ground motions. Accurate understanding for nonstationary coherency can motivate accurate modeling and simulation of spatially incoherent ground motions. In this work, a nonstationary ground motion coherency analysis and modeling are performed using …
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Seismic Assessment of RC Structures Considering Vertical Ground Motion
… investigate the effect of vertical ground motion. FHWA Bridge systems selected from the previously completed analysis was used during full hybrid simulations designed to realistically represent the loading experienced by bridge columns during earthquakes. The horizontal ground motion …
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Torsional effects in structures subjected to strong ground motion
… torsional behavior of structures during strong ground motion were investigated; both linear and nonlinear material behavior were considered. Emphasis was placed on the strong torsional coupling associated with the beating phenomenon in the seismic response of structures with small static …
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Stochastic Ground Motion Models for Uncertainty Quantification in Earthquake Engineering
… inputs, specifically constructing stochastic ground motion models (GMMs) that accurately capture the characteristics and variability of recorded ground motions (GMs). Our core technique employs stochastic process modeling for a suite of recorded GM time series. This modeling accounts for two …
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Influence of intense ground motion on p-delta effect amplification
High intensity ground motion can cause significant deformations, which is the basis for additional second-order responses. This analysis uses two recorded ground motions for historical large earthquakes (Kocaeli and Tohoku), a sinusoidal curve, and a simulated ground motion based on the 1906 San …
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Effect of ground motion frequency on non-structural seismic damage
… design methods consider the effect of peak ground acceleration, while the frequency content of seismic activities remains largely unexplored. In order to better understand the impact of low magnitude seismic activities on non-structural damage, we develop an assessment method for a specific …
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Innovative techniques for seismic-resistant bridge columns under ground motion excitations
… developed using LS-DYNA software. The effects of ground motion characteristics including far-field motions, near-fault motions without forward-directivity, near-fault motions with forward-directivity, and near-fault motions with fling-step on full-scale column models were investigated. An …
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A New Ground Motion Prediction Equation for Otaniemi, Espoo, South-Finland
Uusi maanliikkeen maksimiarvoja ennustava malli, ON21, ratkaistaan ST1 Deep Heat:n geolämpövoimalalle Otaniemeen, Espoon kaupunkiin, Etelä-Suomeen. Raakadataa maanjäristyksistä, jotka sattuivat 2018 stimuloinnin yhteydessä, käsitellään, instrumentin vaste poistetaan ja taajuusaluetta käytetään …
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Regionally adaptable ground-motion Prediction Equations (GMPEs) for seismic hazard analysis
Adjustment of empirically derived ground motion prediction equations (GMPEs), from a data- rich region/site where they have been derived to a data-poor region/site, is one of the major challenges associated with the current practice of seismic hazard analysis. Due to the fre- quent use in …
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Evaluation of Structural Response and Damage Resulting From Earthquake Ground Motion
… strong response and damage from earthquake ground motion is a complex problem and is the subject of this thesis. The factors leading to strong response are not well understood and clearly involve more than peak acceleration and yield level. Present methods for evaluation of damage are …
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Influence of Vertical Ground Motion on Bridges Isolated with Friction Pendulum Bearings
AbstractInfluence of Vertical Ground Motion on Bridges Isolated with FrictionPendulum BearingsThe motivation for this project comes from test of a full scale building isolated withtriple friction pendulum bearings on E-defense shake table at Japan. The test demonstratedexperimentally that the …
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Improved ground motion intensity measures for reliability-based demand analysis of structures
… interval of periods, Sa,avg (T1,…,Tn), as scalar ground motion Intensity Measure (IM) when assessing the seismic performance of inelastic structures. Since the interval of periods where computing Sa,avg is related to the more or less influence of higher vibration modes on the inelastic response, …
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Effects of Site Response on the Correlation Structure of Ground Motion Residuals
… 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 and …
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Enhancements in earthquake ground motion assessment through regional Vₛ₃₀ characterization and Vₛ₃₀ scaling
… can have significant effects on the intensity of ground shaking caused by earthquakes. Vₛ₃₀, the time-averaged shear wave velocity in the upper 30m, is a prevalently utilized parameter in numerous predictive ground motion models (GMMs) and building codes to account for site effects. Although the …
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