Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Seismic Vulnerability Of Bridges In Oregon Highway Network full books in PDF, epub, and Kindle. Read online Seismic Vulnerability Of Bridges In Oregon Highway Network ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : Selamawit Tesfayesus Mehary
Publisher :
ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (696 download)
Download or read book Seismic Vulnerability of Bridges in Oregon Highway Network written by Selamawit Tesfayesus Mehary and published by . This book was released on 2010 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Vulnerability of Oregon State Highway Bridges written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (18 download)
Download or read book Assessment of Seismic Retrofit Prioritization Methodology for Oregon’s Highway Bridges Based on the Vulnerability of Highway Segments written by and published by . This book was released on 2018 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geologists have indicated that the question is not if a catastrophic earthquake will occur in Oregon but when one will occur. Scientists estimate that there is close to 40 percent conditional probability that a Cascadia subduction zone earthquake of magnitude 8.0 or above will strike Oregon in the next 50 years. In addition, the majority of Oregon's bridge inventory was built prior to the current understanding of bridge response and prior to current understanding of the expected earthquake demands. In order to minimize potential bridge damage in the case of an earthquake, one approach is to retrofit seismically deficient bridges. However, often times the decision maker is faced with the difficulty of selecting only a few bridges within the inadequate ones. Hence, the issue of prioritizing upgrading naturally arises. The goal of this study is to assess and refine bridge prioritization methodology to be utilized for ranking Oregon's bridge inventory. CFRP retrofit has been experimentally and analytically evaluated to demonstrate the effectiveness of the technique and was found to be an efficient and economical option. A vulnerability assessment estimates that close to 30 percent of Oregon's highway bridge inventory will sustain moderate damage to collapse. However, retrofitting two most common bridge types in the inventory will reduce the number of damaged bridges by about 70 percent. A cost-benefit assessment that takes into consideration direct and indirect costs associated with damaged bridges and retrofitting of bridges shows that the benefit is up to three times the cost to retrofit. The same principle was applied to rank twelve highway segments for seismic retrofit considered important by Oregon Department of Transportation. One selected segment was considered to be retrofitted and vulnerability assessed. The benefit to cost ratios for each assessment was compared and the highway segments were ranked accordingly. The top five segments in the ranking happen to be located in the East-West corridor connecting I-5 to US-101.
Author : Aleksandar Stevanovic
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.3/5 (555 download)
Download or read book Seismic Vulnerability & Emergency Response Analyses of UDOT Lifelines written by Aleksandar Stevanovic and published by . This book was released on 2010 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report presents estimated traffic disruption user delay costs resulting from two earthquake scenarios in Utah. The VISUM traffic macro-simulation model was used to estimate the delay-based user costs."--Executive summary.
Author : C. Vail Fletcher
Publisher : Lexington Books
ISBN 13 : 1498556124
Total Pages : 279 pages
Book Rating : 4.4/5 (985 download)
Download or read book Natural Disasters and Risk Communication written by C. Vail Fletcher and published by Lexington Books. This book was released on 2018-05-23 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural Disasters and Risk Communication: Implications of the Cascadia Subduction Zone Megaquake asks and addresses how we communicate about natural disasters and what effect our communication has on natural disaster education, understanding, assessment of risk, preparation, and recovery. The chapters of this book present expertise, analyses, and perspectives that are designed to help us better comprehend and deal with the natural risks such as the Cascadia Subduction Zone. It seeks to move past primal, fear-induced physiological and emotional responses to crises with the understanding that if we accept that the disaster will occur, expect it, and learn how we can prepare, we can calm the collective panicked beats of our hearts as we wait for its first tremors.
Author :
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (318 download)
Download or read book Seismic Vulnerability of Timber Bridges and Timber Substructures written by and published by . This book was released on 2007 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : DIANE Publishing
ISBN 13 : 9781568069807
Total Pages : 76 pages
Book Rating : 4.0/5 (698 download)
Download or read book Transportation Infrastructure written by and published by DIANE Publishing. This book was released on 1993-07 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on threats that earthquakes pose to the nation1s bridges.
Author : United States. General Accounting Office
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.F/5 ( download)
Download or read book Transportation Infrastructure written by United States. General Accounting Office and published by . This book was released on 1992 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Martha Sartain
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)
Download or read book Assessing Oregon's Seismic Risk written by Martha Sartain and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The State of Oregon has unique seismic risks associated with its location adjacent to the Cascadia Subduction Zone. The nature and probability of this risk are examined. Because this risk was only recently identified, most of the state's bridges are designed for little or no seismic loads, and thus require a comprehensive program of seismic retrofit. Divided into Phase 1 (superstructure) and Phase 2 (substructure), the retrofit needs have been identified with respect to structure vulnerability and criticality, and work has been proposed and prioritized to account for cost-effectiveness and lifeline classification.
Author : M. Lee Marsh
Publisher : Transportation Research Board
ISBN 13 : 0309223806
Total Pages : 138 pages
Book Rating : 4.3/5 (92 download)
Download or read book Performance-based Seismic Bridge Design written by M. Lee Marsh and published by Transportation Research Board. This book was released on 2013 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 440, Performance-Based Seismic Bridge Design (PBSD) summarizes the current state of knowledge and practice for PBSD. PBSD is the process that links decision making for facility design with seismic input, facility response, and potential facility damage. The goal of PBSD is to provide decision makers and stakeholders with data that will enable them to allocate resources for construction based on levels of desired seismic performance"--Publisher's description.
Author : Roland Nimis
Publisher :
ISBN 13 :
Total Pages : 626 pages
Book Rating : 4.E/5 ( download)
Download or read book Proceedings of the Third National Seismic Conference and Workshop on Bridges and Highways written by Roland Nimis and published by . This book was released on 2002 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 111 pages
Book Rating : 4.:/5 (896 download)
Download or read book Oregon Highways Seismic Plus Report written by and published by . This book was released on 2014 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : U S Government Accountability Office (G
Publisher : BiblioGov
ISBN 13 : 9781289046767
Total Pages : 48 pages
Book Rating : 4.0/5 (467 download)
Download or read book Transportation Infrastructure written by U S Government Accountability Office (G and published by BiblioGov. This book was released on 2013-06 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pursuant to a congressional request, GAO reviewed the threat that earthquakes pose to the nation's bridges, focusing on: (1) which states had areas where bridges could be damaged by moderate- to high-intensity earthquakes; (2) the Federal Highway Administration (FHwA) actions to identify and correct seismic-related bridge deficiencies; and (3) FHwA actions to assist states in addressing seismic deficiencies in bridges. GAO found that: (1) 31 states have bridges that are at risk of damage from moderate- to high-intensity earthquakes; (2) although FHwA has encouraged states to identify and retrofit existing bridges on important defense and evacuation routes and main commuter and commerce routes, states have made limited progress in identifying and correcting seismic-related bridge deficiencies; (3) 8 of the 26 surveyed states at seismic risk stated that they had identified vulnerable bridges and had retrofitted, or were in the process of retrofitting, less than 2 percent of those bridges; (4) states that had made limited attempts to identify and retrofit at-risk bridges cited such reasons for their reluctance to do so as limited funding, a lack of technical retrofit information, and a belief that their states were not at a risk for earthquake damage; (5) although FHwA required states to annually report on their bridges' overall structural condition, it did not require states to identify bridges subject to seismic forces; and (6) because the degree of seismic risk varied among states, FHwA primarily facilitated seismic efforts by providing states with procedural guidance, training, and assistance in state seismic research efforts, but states believed that they needed additional FHwA assistance because they lacked experience and expertise in addressing seismic bridge deficiencies.
Author : Abdollah Shafieezadeh
Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.:/5 (38 download)
Download or read book Seismic Vulnerability and Retrofit Recommendations for State Highway Bridges written by Abdollah Shafieezadeh and published by . This book was released on 2009 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of Utah's population dwells in a seismically active region, and many of the bridges connecting transportation lifelines predate the rigorous seismic design standards that have been developed in the past 10-20 years. Other states in the west have instituted seismic retrofit programs in response to damage to transportation networks in past California earthquakes. In a parallel report, seismic retrofit guidelines were developed for Utah based on the Seismic Retrofitting Manual for Highway Structures published by FHWA. In this report, representative case study bridges are evaluated in detail using the guidelines. The case study evaluations include the following for each bridge: 1- selection and presentation of analysis method, 2- development of numerical model in LARSA 4D and/or additional programs as needed, 3- evaluation of the seismic response of the unretrofitted bridge, 4- design of a possible retrofit scheme. The bridges evaluated include a four-span simply supported prestressed concrete girder bridge, a four-span continuous concrete T-beam, and an eight-span curved steel girder bridge with in-span pin and hanger joints.
Author :
Publisher :
ISBN 13 :
Total Pages : 340 pages
Book Rating : 4.:/5 (1 download)
Download or read book Socio-economic Effect of Seismic Retrofit Implemented on Bridges in Los Angeles Highway Network written by and published by . This book was released on 2008 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (896 download)
Download or read book Oregon Highways Seismic Options Report written by and published by . This book was released on 2013 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Edward Lens
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (11 download)
Download or read book Quantifying the Seismic Vulnerability of Bridges in Low to Moderate Seismicity Regions written by John Edward Lens and published by . This book was released on 2019 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Congressional Research Service issued a report for Congress in May 2016, entitled "Earthquake Risk and U.S. Highway Infrastructure: Frequently Asked Questions" which highlighted the absence of a national database on the status of seismic vulnerability of bridges or other infrastructure, and thus no estimate of costs to retrofit vulnerable bridges. Low to moderate seismicity regions exist in each of the continental United States, with over 30 states having mostly or entirely low-to-moderate seismicity. Resources at state transportation agencies and municipalities are focused on higher seismicity regions, creating a gap in quantifying the system-wide seismic vulnerability despite an overall aging bridge inventory, much of which was built before current seismic design standards. This research addressed this data gap and reduces barriers to quantifying seismic vulnerability of existing bridges in low-to-moderate seismicity regions. The work included nonlinear dynamic numerical modeling of typical multiple span bridge configurations in both pristine and deteriorated conditions, by subjecting them to seventy ground motions across four low-to-moderate seismic hazard levels, to evaluate their seismic performance. These typical bridge configurations represent over 160,000 bridges, which comprise 55% of the multiple span bridges nationwide. The research results indicate that there is an overall low probability of significant seismic damage to these typical bridges in such regions. The results also show that current seismic hazard thresholds used for the design of new bridges, and for retrofit of existing bridges, which provide the basis for exempting some bridges from specific seismic analysis and design, can underestimate the expected seismic forces. Those results can be used to refine those exemption thresholds to provide appropriate protection against potential seismic damage in those cases. The study results also formed the basis for a system-wide rapid seismic vulnerability screening algorithm developed for the Vermont bridge inventory, which is applicable to other states with low to moderate seismicity regions.
