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Showing 1 to 14 of 14 for “"strong ground motion"”.
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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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Torsional effects in structures subjected to strong ground motion
… and 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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Effects of web reinforcement discontinuities on the seismic response of structural walls
… caused severe damage in structural walls during strong ground motion. To test this hypothesis, six small-scale reinforced concrete structural walls were tested under lateral displacement reversals. Test variables included the presence of web longitudinal reinforcement discontinuities and number …
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Detecting and Quantifying Damage in Buildings Using Earthquake Response Data and Capacity Curves
… expecting 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. …
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A performance based approach for seismic design with hysteretic dampers
… promising strategy for controlling damage due to strong ground motion is the use of buckling restrained braces that dissipate energy by hysteretic behavior. Research conducted in the past reveals that devices such as The Unbonded Brace (TM) provide stiffness and damping to the structure, two key …
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Spatial Variation of Magnitude Scaling Factors During the 2010 Darfield and 2011 Christchurch, New Zealand, Earthquakes
… (MSF) account for the durational effects of strong ground shaking on the inducement of liquefaction within the simplified liquefaction evaluation procedure which is the most commonly used approach for assessing liquefaction potential worldwide. Within the context of the simplified procedure, …
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Finite Element Analysis of the Application of Synthetic Fiber Ropes to Reduce Seismic Response of Simply Supported Single Span Bridges
… made to determine how one-dimensional, axial ground motion and three-dimensional ground motion affect bridge response. Analysis were then run to determine the effectiveness of the SCEDs at restraining bridge motion during strong ground motion. The SCEDs were found to be effective at …
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Topography effects in the 1999 Athens earthquake : engineering issues in seismology
… and frequency characteristics of seismic motion. Macroseismic observations of destructive earthquakes often show higher damage intensity at the tops of hills, ridges and canyons than at lower elevations and on flat areas. Systematic seismic motion amplification over convex topographies has …
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Using Pulse R -Factors to Estimate Structural Response to Earthquake Ground Motions
… developed 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 …
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Comparison of 4.5 Hz Geophones and a Broadband Seismometer in a Real Field Deployment
… (50 s). For quiet ambient noise, the waveforms strongly correlate down to <0.25 Hz (4 s) and the power spectral density match to the low-frequency side of the microseismic peak at ~0.15 Hz (~7 s). By deploying a much larger number of geophones, waveforms can be stacked to reduce instrument …
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Assessing the Seismic Hazard in Charleston, South Carolina: Comparisons Among Statistical Models
Seismic hazard calculations for sites in eastern North America have traditionally assumed a Poisson process to describe the temporal behavior of earthquakes and have employed the Gutenberg-Richter relationship to define the frequency distribution of earthquake magnitude. For sites in areas where …
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Structural modelling and earthquake analysis of a hospital building located within the Tjörnes fracture zone in Iceland
… system is a part of the multidisciplinary strong motion array,ICEARRAY II, which is in operation in North Iceland. The measurements have been ongoing for one year and three notable events have occurred that provide useful full-scale records of the building excitation and response and which …
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A comparison of proxies for seismic site conditions and amplification for the large urban area of Santiago de Chile
… to buildings within short distances indicating strong influence of local sediments and the shape of the sediment-bedrock interface on ground motion. Therefore, a temporary seismic network was installed in the urban area for recording earthquake activity, and a study was carried out aiming to …
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Torsional Ground Motion Effects on the Seismic Response of Continuous Box-girder Highway Bridges
… response characteristics under various types of ground motions. Undoubtedly, investigations relating to both structural components as well as the strong ground motion characteristics play major roles in providing reliable design guidelines for highway bridges. It is generally accepted that ground …