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Showing 1 to 20 of 145 for “"Ground Motions"”.
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Quantification of ground motions by broadband simulations
In many procedures of seismic risk mitigation, ground motion simulations are needed to test systems or improve their effectiveness. For example they may be used to estimate the level of ground shaking caused by future earthquakes. Good physical models for ground motion simulation are also thought …
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A Study of Air-Blast-Induced Ground Motions
Made available in DSpace on 2014-12-08T23:56:54Z (GMT). No. of bitstreams: 1 6801703.pdf: 4251610 bytes, checksum: 39386a11fc3e26a1e339dfe86bb7116a (MD5) Previous issue date: 1967
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Response of Simple Inelastic Systems to Ground Motions
Made available in DSpace on 2014-12-05T17:37:38Z (GMT). No. of bitstreams: 1 6303218.pdf: 8568236 bytes, checksum: 69c55c10e167b9f42e6f4818dbf12c84 (MD5) Previous issue date: 1962
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IMAGE-BASED MODELING AND PREDICTION OF NON-STATIONARY GROUND MOTIONS
… Performing such an analysis requires input ground motions, which are often obtained through simulations, due to the lack of sufficient records representing a given scenario. As seismic ground motions are characterized by time-varying amplitude and frequency content, and the response of …
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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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A three-dimensional analytical study of spatial variability of seismic ground motions
… to estimate the spatial variation of seismic ground motions which is necessary for the analysis and design of lifeline systems. An analytical model for wave propagating through a three-dimensional half-space is first proposed to evaluate the ground responses. The incoherent slip over a fault …
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Ground motions and source mechanisms of earthquakes in multiscales : microseismicity to macroseismicity
… another mideast country - Kuwait. We conducted ground motion calculations in Kuwait due to regional large earthquakes and to local seismicity. We found that the regional earthquakes with low-frequency and long-duration surface waves were most likely to affect tall buildings, while the local …
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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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Informing Code-Compliant Site-Specific Infrastructure Seismic Evaluations With Physics-Based Simulated Ground Motions
… for seismic design require the use of a suite of ground motions that are selected and scaled to a target spectrum for performing nonlinear time-history analyses. Suitable sets of ground-motion records shall be selected by appropriately considering the earthquake parameters controlling the hazard …
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Probabilistic Assessment of Non-Ductile Reinforced Concrete Frames Susceptible to Mid-America Ground Motions
… center close to the NMSZ. Synthetic earthquake ground motions for the CEUS that are available from two different Mid-America Earthquake (MAE) Center projects were used in the finite element-based simulations for determining the seismic demand on the GLD RC frames by nonlinear time history …
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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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New Model And Simulation Algorithm Of Nonstationary Non-gaussian Ground Motions Based On S-transform
The seismic ground motions are nonstationary stochastic processes and vary from site to site. The time histories of synthetic ground motions are used for nonlinear inelastic structural dynamic analysis since the historical records are limit or unavailable for a particular scenario seismic event. …
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Evaluation of Site Response Analysis for Vertical Ground Motions in LS-DYNA Using Geotechnical Downhole
… Current practice for predicting vertical ground motion is to use the V/H method, which is not site specific. This method utilized measured vertical to horizontal (noise or earthquake) spectral ratios to convert ground motion prediction equation outputs to the vertical direction. The final …
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Current Ground Motions Along the Long-Point Fault Derived from Continuous GPS Observations (2012-2014)
… along the length of the fault surface trace. Groundwater data from water wells near the Long-Point Fault area were obtained and examined for possible correlation with subsidence. At the end of 2014, the groundwater levels in the Chicot and Evangeline aquifers in the Long-Point Fault area are …
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Current Ground Motions in Montgomery, West Liberty, and Northern Harris Counties Derived from Continuous GPS Motions
… ceased (< 3 mm/ year) as a result of enforced groundwater regulations. Slight land rebound has been observed along the Houston Ship Channel area since 2005. However, GPS observations indicate that subsidence rates over about 2 cm/year are occurring in the southern part of Montgomery county and …
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Wavelet-Based Characterization and Stochastic Modelling of Pulse-like Ground Motions on the Time-frequency Plane
… 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 techniques (the …
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Development of Computational Tools for Characterization, Evaluation, and Modification of Strong Ground Motions within a Performance-Based Seismic Design Framework
… 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 easy. Unlike the linear response of a structure, which can often be obtained by using a single spectrally …
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Considering a Seismically Active Leech River Valley Fault Zone in Southwestern British Columbia
… of an active LRVFZ to predicted earthquake ground motions for Victoria. In a probabilistic formulation considering the likelihood of all earthquake sources, LRVFZ earthquakes will contribute the most to high-frequency ground motions (≥ 10 Hz) in Victoria. The Canadian seismic design ground …
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