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9 results for "earthquake modeling"
Earthquake Resurrection: Supernatural Catalyst for the Coming Global Catastrophe By David Lowe
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EARTHQUAKE RESURRECTION presents a model for future events that will challenge the traditional interpretation of the prophecies of the Bible. Discover a shocking link between the resurrection of the... More > dead and earthquakes which has momentous implications for a near-future global catastrophe.< Less
Incorporating Induced Seismicity in the 2014 United States National Seismic Hazard Model: Results of 2014 Workshop and Sensitivity Studies By U.S. Geological Survey & U.S. Department of the Interior
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Incorporating Induced Seismicity in the 2014 United States National Seismic Hazard Model: Results of 2014 Workshop and SensThe U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) for... More > the conterminous United States was updated in 2014 to account for new methods, input models, and data necessary for assessing the seismic ground shaking hazard from natural (tectonic) earthquakes. The USGS NSHM project uses probabilistic seismic hazard analysis to quantify the rate of exceedance for earthquake ground shaking (ground motion). For the 2014 NSHM assessment, the seismic hazard from potentially induced earthquakes was intentionally not considered because we had not determined how to properly treat these earthquakes for the seismic hazard analysis. The phrases “potentially induced” and “induced” are used interchangeably in this report, however it is acknowledged that this classification is based on circumstantial evidence and scientific judgment.< Less
OTREC-RR-11-22 By Peter Dusicka & Selamawit T Mehary
Paperback: $5.48
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This project developed a seismic model for Oregon truck routes using Risk for Earthquake Damage to Roadway Systems (REDARS2) and HAZUS-MH. We refined data from the first model to more realistically... More > represent bridge inventory, address the seismicity of the Pacific Northwest (PNW), conduct sensitivity analyses of soil data and develop a seismic network model of Oregon bridges to assess roadway vulnerability. Assumptions were reviewed and Oregon data was incorporated to replace defaults for economic loss. The largest probable PNW earthquake is a subduction zone earthquake. A shortcoming of REDARS2 is its inability to incorporate subduction zone attenuation. USGS shakemaps for Cascadia subduction zone events are incorporated to add that capability. Analyses of the network incorporating bridges and post processing of the data with input from Oregon DOT engineers resulted in recommendations for bridge route priorities. More data and cost-benefit analyses are needed for final retrofit decisions.< Less
Vibration Measurement By Homework Help Classof1
eBook (PDF): $1.99
In some practical situations, it might be difficult to develop a mathematical model of the system and predict its vibration characteristics through an analytical study. In such cases, we can use... More > experimental methods to measure the vibration response of the system to a known input. This helps in identifying the system in terms of its mass, stiffness, and damping.< Less
Explore Rocks and Minerals By Cynthia Light Brown & Nick Brown
eBook (PDF): $8.99
Explore Rocks and Minerals! offers kids ages 6–9 a fascinating introduction to geology. It investigates the geological forces that create and transform rocks, outlining the life cycle of... More > igneous, sedimentary, and metamorphic rocks, and what they can tell us about the earth. It also explores fossils, and how they come to exist and are discovered. Explore Rocks and Minerals includes 20 hands-on activities to bring learning to life. Kids create their own crystals, sculpt edible models of the planet, and bake volcanic meringue cookies. These easyto- follow activities require minimal adult supervision and use common household products. By combining an interactive component with jokes, fun facts, and cartoons, Explore Rocks and Minerals! provides a fun, accessible introduction to geology.< Less
Retrofitting of RCC Water Tank By V.D. Salunkhe et al.
eBook (PDF): $8.99
The Indian standard “Criteria for Earthquake Resistant Design of Structures: IS 1893:2002” has been revised. The seismic zone factors have been changed. Response spectra are now specified... More > for 03 types of founding soil strata & a response reduction factor has been introduced. Elevated water tanks are vulnerable to earthquakes, owing to large mass concentrated at the top of relatively slender supporting systems. Existing elevated water tanks in India designed using IS 1893:1984 needs to be checked for safety as per revised code (IS 1893-2002) by carrying out static analysis. It is observed that the structure is unsafe due to under estimation of seismic load as per old code provisions. Retrofit measures such as additional structural elements and passive devices like viscous and friction dampers are modeled and structure analyzed again to check for compliance with the revised code.< Less
OTREC-RR-11-08 By Peter Dusicka & Jeff Roberts
eBook (PDF): $0.00
Frequently traveled roads in Oregon are in seismically active areas. Many of our bridges were designed and built to lateral demands that were assumed to be less than the current expectation, due to... More > improved awareness of seismic hazard and enhanced understanding of the non-linear response of bridges. This vulnerability to earthquakes can result in not only immediate damage, but also in the potentially lingering economic impact of disrupted traffic and freight. Fragility curves were constructed assuming lognormal capacity and demand distributions. Probability of failure was determined for slight, moderate, extensive, and complete damage. Statistical values were compared to the median and dispersion values proposed by other researchers, and calculated using guidelines from the HAZUS Technical Manual. Older multiple-span bridges were found to be significantly more fragile than the models. Through this modeling and analysis, the relative fragility of the modeled typical 3-span and 5-span bridges was determined.< Less
OTREC-RR-11-08 By Peter Dusicka & Jeff Roberts
Paperback: $5.41
Prints in 3-5 business days
Frequently traveled roads in Oregon are in seismically active areas. Many of our bridges were designed and built to lateral demands that were assumed to be less than the current expectation, due to... More > improved awareness of seismic hazard and enhanced understanding of the non-linear response of bridges. This vulnerability to earthquakes can result in not only immediate damage, but also in the potentially lingering economic impact of disrupted traffic and freight. Fragility curves were constructed assuming lognormal capacity and demand distributions. Probability of failure was determined for slight, moderate, extensive, and complete damage. Statistical values were compared to the median and dispersion values proposed by other researchers, and calculated using guidelines from the HAZUS Technical Manual. Older multiple-span bridges were found to be significantly more fragile than the models. Through this modeling and analysis, the relative fragility of the modeled typical 3-span and 5-span bridges was determined.< Less
Dynamic Bridge Substructure Evaluation and Monitoring By Federal Highway Administration & Larry D. Olson, P.E.
Paperback: $24.94
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This research project, “Dynamic Bridge Substructure Evaluation and Monitoring,” was sponsored by the Federal Highway Administration (FHWA) under contract number DTFH61-96- C-00030. The... More > research was funded to investigate the possibility that by measuring and modeling the dynamic response characteristics of a bridge substructure, one could determine the condition and safety of the substructure and identify its foundation type (shallow or deep). Determination of bridge foundation conditions with this approach may be applied to quantify losses in foundation stiffness caused by earthquake, scour, and impact events. Identification of bridge foundation type may be employed to estimate bridge stability and vulnerability under dead and live load ratings, particularly for unknown bridge foundations. Chapter 2 introduces the research project scope and presents the results of a literature review of related topics. Chapter 3 describes the bridges in Texas that were selected for modal vibration tests during the research.< Less

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