Seismic Risk Assessment Of Bridges In Clark County Nevada
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Seismic Risk Assessment Of Bridges In Clark County Nevada
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Author : David Bingham Porter
language : en
Publisher:
Release Date : 2006
Seismic Risk Assessment Of Bridges In Clark County Nevada written by David Bingham Porter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Bridges categories.
Bridges are a vital connective element in a community's transportation system. In the past, bridges have been severely damaged by earthquakes, but with proper mitigation techniques, such as bridge retrofit, severe earthquake damage to bridges can be avoided. The objective of this project was to perform a seismic risk assessment on bridges in Clark County, Nevada. A seismic risk analysis is the first step to effectively plan for an earthquake. A risk analysis identifies bridges that could be potentially hazardous to the public. There are two key elements of a risk analysis: the importance assessment and the vulnerability assessment. The importance assessment takes into account the number of people that will be affected by a damaged bridge. It considers both immediate and long-term effects of an earthquake. A spreadsheet-type analysis was performed to assess bridge importance. Bridge characteristics such as average daily traffic, detour length, pedestrian traffic, railroad traffic, historical significance, and defense route were used in the analysis. The vulnerability assessment takes into account the behavior of a bridge during an earthquake (i.e., how much damage a bridge is expected to sustain). A GIS-based software called HAZUS-MH was used to analyze the bridges in Clark County. HAZUS-MH takes into account parameters such as bridge material, construction type, skew angle, soil type, and liquefaction potential. The results from the importance assessment, vulnerability assessment, and overall risk analysis can be used to assist pre- and post-earthquake planning organizations in mitigation and preparation efforts for future earthquakes.
Earthquake Risk Assessment Of Reinforced Concrete Bridges In Washington State Using Pushover Analysis
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Author : Abigail B. Christman
language : en
Publisher:
Release Date : 2017
Earthquake Risk Assessment Of Reinforced Concrete Bridges In Washington State Using Pushover Analysis written by Abigail B. Christman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
The average age of reinforced concrete bridges in the state of Washington is 48 years, encompassing more than 100 years of design and construction techniques, which reflect evolving views on seismic risk and mitigation. As such, there is great uncertainty as to the actual seismic resistance of existing bridges. Having a simple and accurate process for assessing the seismic vulnerability of a bridge can help identify vulnerable design details and address them, either through retrofit or replacement. Using pushover analysis to determine the seismic capacity of structures can give an idea of the overall vulnerability of the structure while decreasing the computational power needed to perform analyses as compared to nonlinear time history (NLTH) analysis. Using the finite element program RUAUMOKO-2D, models of existing WSDOT bridges were created and pushover analyses were run. By defining damage states of interest and determining the associated displacement profiles, peak ground accelerations (PGAs) of seismic events were then correlated to the damage states. By combining fragility curves encompassing the probabilistic distribution of the PGA at which a damage state might occur with site hazard risks, Risk Indices were calculated for all bridges considered. The bridges were ranked in order to contextualize the Risk Index values. The results of the assessment process were then verified by comparing them to the results of NLTH analysis.
Risk Assessment Of Highway Bridges Under Multi Hazard Effect Of Flood Induced Scour And Earthquake
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Author : Taner Yilmaz
language : en
Publisher:
Release Date : 2015
Risk Assessment Of Highway Bridges Under Multi Hazard Effect Of Flood Induced Scour And Earthquake written by Taner Yilmaz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Natural disasters may have significant impact on the functionality of highway transportation systems resulting in unacceptable socio-economic losses. Flood and earthquake hazards can be considered as two most significant natural threats to safety of bridges. The overarching need for safety and serviceability of critical transportation infrastructure system requires highway bridges to be analyzed and designed not only for discrete hazard events, but also for possible multiple-hazard (or multi-hazard) conditions. For a highway network spanning over a seismically-active flood-prone region, the occurrence of earthquakes in the presence of flood-induced scour is a possible multi-hazard scenario for bridges in the network. The varied dynamic characteristics of a bridge due to the occurrence of scour may affect the response of the bridge under earthquake loading, and eventually may increase the risk of bridge failure.Despite the rising concern of research communities on this topic, the issues related to the multi-hazard effect of flood-induced scour and earthquake on highway bridges have not been satisfactorily answered. In addition, no guideline is currently available in design codes to ensure seismic safety of bridges with potentially scoured foundations. This dissertation aims to improve a comprehensive knowledge-base on risk and reliability analyses of highway bridges subjected to this multi-hazard by developing a multi-hazard risk assessment framework for bridges and quantifying variability in multi-hazard fragility and risk of bridges through a thorough uncertainty analysis. Outcome of this research provides research communities and government agencies a better understanding of the multi-hazard effect of flood-induced scour and earthquake on the risk and reliability of highway bridges. It also serves as a foundation for future researches on developing strategic plans for repair or retrofit prioritization for highway bridges under similar multi-hazard conditions.
Procedures For Estimating Earthquake Ground Motions
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Author : Walter W. Hays
language : en
Publisher:
Release Date : 1980
Procedures For Estimating Earthquake Ground Motions written by Walter W. Hays and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Earthquake resistant design categories.
Geological Survey Professional Paper
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Author :
language : en
Publisher:
Release Date : 1979
Geological Survey Professional Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Geology categories.
Practical Lessons From The Loma Prieta Earthquake
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1994-02-01
Practical Lessons From The Loma Prieta Earthquake written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-02-01 with Science categories.
The Loma Prieta earthquake struck the San Francisco area on October 17, 1989, causing 63 deaths and $10 billion worth of damage. This book reviews existing research on the Loma Prieta quake and draws from it practical lessons that could be applied to other earthquake-prone areas of the country. The volume contains seven keynote papers presented at a symposium on the earthquake and includes an overview written by the committee offering recommendations to improve seismic safety and earthquake awareness in parts of the country susceptible to earthquakes.
U S Geological Survey Professional Paper
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Author :
language : en
Publisher:
Release Date : 1980
U S Geological Survey Professional Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Geology categories.
Sea Level Rise And Coastal Infrastructure
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Author : Bilal M. Ayyub
language : en
Publisher: Amer Society of Civil Engineers
Release Date : 2012
Sea Level Rise And Coastal Infrastructure written by Bilal M. Ayyub and has been published by Amer Society of Civil Engineers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Nature categories.
Sponsored by the Council on Disaster Risk Management Sea Level Rise and Coastal Infrastructure: Prediction, Risks, and Solutions analyzes the challenges posed by rising sea levels and climate change. Scientists estimate that global sea levels could rise by as much as 20 feet in this century, directly affecting about 100 million people worldwide. Although the problems stemming from higher sea levels are formidable, immediate actions can be identified and executed to lessen the impact of rising waters on coastal infrastructure and communities. Using a risk analysis and management framework, each chapter in this volume focuses on a facet of sea level rise, examining its associated risks and assessing its socioeconomic impact. From this information, appropriate long-term measures and mitigation strategies can be developed. Chapters consider such questions as: How can we model the impact of rising sea levels and increasingly intense tropical storms on coastal infrastructure? What strategies can be phased in to improve new construction? How can existing infrastructure best be targeted for retrofitting? How can risk models be designed to accommodate regional socioeconomic considerations? Engineers, scientists, and policymakers concerned with planning, design, and construction of coastal infrastructure will find this compact assessment useful, relevant, and thought-provoking.
Bridge Life Cycle Cost Analysis
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Author : Hugh Hawk
language : en
Publisher: Transportation Research Board
Release Date : 2003
Bridge Life Cycle Cost Analysis written by Hugh Hawk and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.
Accompanying CD-ROM contains software, Guidance manual, User manual, and appendixes to report.
Asce Combined Index
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Author : American Society of Civil Engineers
language : en
Publisher:
Release Date : 1990
Asce Combined Index written by American Society of Civil Engineers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Civil engineering categories.
Indexes materials appearing in the Society's Journals, Transactions, Manuals and reports, Special publications, and Civil engineering.