Seismic Vulnerability Analysis Of Scoured Bridge Systems
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| Author | : Xuan Guo |
| Publisher | : |
| Total Pages | : 255 |
| Release | : 2014 |
| Genre | : Bridges |
| ISBN | : |
Bridges are a vital infrastructure component of the transportation networks in both rural and urban areas. Damaged or destroyed bridges can affect the reliability and resilience of transportation networks that are critical to human life, economical activities, and the social sustainability at large. Understanding how natural hazards affect the life-cycle performance of bridge systems will lead to improved preparedness prior to extreme disasters and benefit the society ultimately. Among many natural events, flood-induced foundation scour has been recognized as a leading cause of bridge failure in the United States. The distinct feature of flood-induced scour is that it may last during the rest of bridge's service life once it is formed around a bridge foundation. Intuitively, the threat may be potentially more severe if the permanent scour is combined with other hazards, such as earthquakes. However, the combined effects of such multiple hazards are not clearly understood to date. It is thus meaningful to investigate the effects of multi-hazard earthquake and scour on the seismic performance of river-crossing bridges. The general objective of this dissertation is to assess the seismic vulnerability of bridge structures considering flooding-induced scour in a general multi-hazard context. To meet this objective, five related research problems are defined in this dissertation. Correspondingly, scientific answers and technical solution frameworks are developed in this dissertation. The dissertation directly contributes to the multi-hazard assessment methodology with an emphasis in flood-induced scour and earthquake hazards. Specifically, the dissertation directly resolves the practical challenge of evaluating the effects of bridge scour on the seismic performance of river-crossing bridges in terms of theoretical frameworks, numerical procedures, and case study-based findings. Future research directions along the line of multi-hazard bridge performance research with an emphasis of hydro- and seismic-impacts are pointed at the end of the dissertation.
| Author | : Matt Hardman |
| Publisher | : |
| Total Pages | : 34 |
| Release | : 2013 |
| Genre | : Bridges |
| ISBN | : |
Depending on the location, highway bridges can often support considerable amounts of traffic. Due to the limitations on current earthquake forecasting techniques, a normal amount of traffic will also typically remain on a bridge when an earthquake occurs. In addition to traffic, scour effects are also a potential hazard to bridge piers that may simultaneously impact the structural integrity of the bridge together with seismic loads. Although a few studies investigating the combined effect of extreme and service loads have been conducted on long-span bridges or in high-seismic zones, the studies on typical short- and medium-span bridges in low and moderate seismic zones are rare. A general dynamic simulation methodology is introduced to study the combined realistic service and extreme loads on short- and medium-span bridges. Following the introduction of the methodology, a numerical study investigating the seismic performance of a typical highway bridge in mountainous states is carried out. The bridge is subjected to different combinations of traffic, seismic, and scour and the effects on the structural performance of the bridge are investigated. The bridge, including both superstructure and substructure, is modeled in detail using SAP2000 to accommodate the goals of this study. The traffic load is considered through dynamic interaction analysis of vehicles in the simulated stochastic traffic flow. Through studying the bridge performance under various combined extreme and service loads, findings are made about controlling cases for different bridge responses and the validity of the traditional superposition approach with consideration to load combinations is also discussed. As the initial effort studied the bridge performance under multiple service and extreme loads, this study sheds some light on more comprehensive studies for the future.
| Author | : |
| Publisher | : |
| Total Pages | : 28 |
| Release | : 2002 |
| Genre | : Bridges |
| ISBN | : |
This executive summary gives an overview of the results of FHWA Contract DTFH61 92 C 00112, Seismic Research Program, which performed a series of special studies addressing the seismic design of new construction. The objectives of this project were to perform a series of special studies pertaining to the seismic vulnerability of highway structures, and to develop technical information on which future specifications for the seismic design of bridges could be based. This project divided work into 5 areas and 13 tasks, focusing on the following elements: review of current seismic design criteria, the seismic hazard exposure of the American highway system, foundation design and soil behavior, structural design, structural analysis and response, the relative importance of specific bridges and an assessment of the impact of current and recently completed research. The Seismic Research Program had a national focus, and aimed in part to address the differences in seismicity, bridge types, and typical design details between the central and eastern United States (CEUS) and those previously studied in California and the western United States. In many cases, west coast design practices required considerable modification before implementation in the CEUS. The project resulted in 34 research reports, of which 31 are summarized in this document. Seventeen of the reports have been published as National Center for Earthquake Engineering Research (NCEER) or Multidisciplinary Center for Earthquake Engineering Research (MCEER) reports. The research agencies final reports for the other taks are available from MCEER upon request.
| Author | : Jamie Ellen Padgett |
| Publisher | : |
| Total Pages | : 270 |
| Release | : 2007 |
| Genre | : |
| ISBN | : 9780549008798 |
There is an urgent need for the development of fragility curves for retrofitted bridges, particularly for the CSUS. These fragility curves are conditional probability statements of potential levels of damage over a range of earthquake intensities. The development of reliable retrofitted bridge fragility curves would allow for assessment of the effects of various retrofit measures on the performance of different CSUS bridge types. Therefore, a primary objective of this work is to develop a methodology for fragility assessment of bridge retrofit, in order to support seismic risk mitigation efforts in the region.
| Author | : Tiago Miguel Ferreira |
| Publisher | : Woodhead Publishing |
| Total Pages | : 396 |
| Release | : 2021-12-02 |
| Genre | : Technology & Engineering |
| ISBN | : 0128240725 |
Seismic Vulnerability Assessment of Civil Engineering Structures at Multiple Scales: From Single Buildings to Large-Scale Assessment provides an integrated, multiscale platform for fundamental and applied studies on the seismic vulnerability assessment of civil engineering structures, including buildings with different materials and building typologies. The book shows how various outputs obtained from different scales and layers of assessment (from building scale to the urban area) can be used to outline and implement effective risk mitigation, response and recovery strategies. In addition, it highlights how significant advances in earthquake engineering research have been achieved with the rise of new technologies and techniques. The wide variety of construction and structural systems associated with the complex behavior of their materials significantly limits the application of current codes and building standards to the existing building stock, hence this book is a welcomed guide on new construction standards and practices. - Provides the theoretical backgrounds on the most advanced seismic vulnerability assessment approaches at different scales and for most common building typologies - Covers the most common building typologies and the materials they are made from, such as concrete, masonry, steel, timber and raw earth - Presents practical guidelines on how the outputs coming from such approaches can be used to outline effective risk mitigation and emergency planning strategies
| Author | : Junbo Jia |
| Publisher | : Springer |
| Total Pages | : 741 |
| Release | : 2017-11-26 |
| Genre | : Technology & Engineering |
| ISBN | : 3319403583 |
This book presents a comprehensive topical overview on soil dynamics and foundation modeling in offshore and earthquake engineering. The spectrum of topics include, but is not limited to, soil behavior, soil dynamics, earthquake site response analysis, soil liquefactions, as well as the modeling and assessment of shallow and deep foundations. The author provides the reader with both theory and practical applications, and thoroughly links the methodological approaches with engineering applications. The book also contains cutting-edge developments in offshore foundation engineering such as anchor piles, suction piles, pile torsion modeling, soil ageing effects and scour estimation. The target audience primarily comprises research experts and practitioners in the field of offshore engineering, but the book may also be beneficial for graduate students.
| Author | : Ayman A. Shama |
| Publisher | : |
| Total Pages | : 202 |
| Release | : 2007 |
| Genre | : Earthquake engineering |
| ISBN | : |
| Author | : EQE Engineering Consultants |
| Publisher | : |
| Total Pages | : |
| Release | : 1997 |
| Genre | : Bridges |
| ISBN | : |
| Author | : S Tesfamariam |
| Publisher | : Elsevier |
| Total Pages | : 920 |
| Release | : 2013-04-30 |
| Genre | : Science |
| ISBN | : 0857098985 |
Earthquakes represent a major risk to buildings, bridges and other civil infrastructure systems, causing catastrophic loss to modern society. Handbook of seismic risk analysis and management of civil infrastructure systems reviews the state of the art in the seismic risk analysis and management of civil infrastructure systems.Part one reviews research in the quantification of uncertainties in ground motion and seismic hazard assessment. Part twi discusses methodologies in seismic risk analysis and management, whilst parts three and four cover the application of seismic risk assessment to buildings, bridges, pipelines and other civil infrastructure systems. Part five also discusses methods for quantifying dependency between different infrastructure systems. The final part of the book considers ways of assessing financial and other losses from earthquake damage as well as setting insurance rates.Handbook of seismic risk analysis and management of civil infrastructure systems is an invaluable guide for professionals requiring understanding of the impact of earthquakes on buildings and lifelines, and the seismic risk assessment and management of buildings, bridges and transportation. It also provides a comprehensive overview of seismic risk analysis for researchers and engineers within these fields. - This important handbook reviews the wealth of recent research in the area of seismic hazard analysis in modern earthquake design code provisions and practices - Examines research into the analysis of ground motion and seismic hazard assessment, seismic risk hazard methodologies - Addresses the assessment of seismic risks to buildings, bridges, water supply systems and other aspects of civil infrastructure
| Author | : Feng Qing-Hai |
| Publisher | : |
| Total Pages | : |
| Release | : 2012 |
| Genre | : |
| ISBN | : 9789535101239 |
