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Performance Based Earthquake Engineering Design Evaluation Procedure For Bridge Foundations Undergoing Liquefaction Induced Lateral Ground Displacement
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Book Synopsis Performance-based Earthquake Engineering Design Evaluation Procedure for Bridge Foundations Undergoing Liquefaction-induced Lateral Ground Displacement by : Christian A. Ledezma
Download or read book Performance-based Earthquake Engineering Design Evaluation Procedure for Bridge Foundations Undergoing Liquefaction-induced Lateral Ground Displacement written by Christian A. Ledezma and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance-based Earthquake Engineering Design Evaluation Procedure for Bridge Foundations Undergoing Liquefaction-induced Lateral Spreading by : Christian Alfonson Ledezma Araya
Download or read book Performance-based Earthquake Engineering Design Evaluation Procedure for Bridge Foundations Undergoing Liquefaction-induced Lateral Spreading written by Christian Alfonson Ledezma Araya and published by . This book was released on 2007 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil-Structure Interaction written by and published by NZ Geotechnical Society. This book was released on 1978 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance-based Seismic Bridge Design by : M. Lee Marsh
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.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Response and Performance-Based Assessment of Multi-Span Bridge-Ground Systems by : Abdullah S E S E Almutairi
Download or read book Seismic Response and Performance-Based Assessment of Multi-Span Bridge-Ground Systems written by Abdullah S E S E Almutairi and published by . This book was released on 2019 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conducted study is directed towards enhancements in performance assessment of highway bridges under a wide range of earthquake input shaking scenarios. Seismic response of the superstructure is highly influenced by the global bridge-ground characteristics as an integral system. Therefore, nonlinear representation of the bridge deck, columns, abutments, and foundation response are to be integrated within a unified framework. On this basis, a performance-based earthquake engineering (PBEE) framework was extended and utilized to estimate the post-earthquake loss. To facilitate systematic execution of this analysis framework, a graphical user-interface was further developed and employed. For calibration purposes, a Finite Element (FE) model of an existing large heavily instrumented bridge system at Eureka, California (Samoa Channel Bridge) was developed. Calibration was undertaken based on the recorded earthquake response. Numerical simulations of the bridge model under seismic loading conditions were conducted. Simulation results show that the recorded data provide valuable insights to understand the seismic bridge response and to reliably estimate the damage. Using a practice-oriented pushover procedure, the response of a bridge subjected to liquefaction-induced lateral spreading was investigated. The analysis framework and representative results are presented, where the abutment lateral slope displacement is resisted by the entire bridge configuration. Permanent ground deformation induces longitudinal displacement on the abutment and consequently the entire bridge system. As such, the response of the bridge and its pile foundations were investigated and correlated with the imposed lateral spreading displacement. Overall, the novel contributions and findings are summarized as follows: (1) A bridge-ground seismic response computational analysis tool was further developed for routine practical applications; (2) In this tool, a PBEE framework was extended to handle multi-span bridge-ground systems within an integrated simulation environment; (3) Calibrated by recorded earthquake response, a framework was implemented for a representative large instrumented bridge-ground system in California to illustrate the involved response mechanisms and PBEE outcomes; (4) For response under lateral spreading considerations, a global bridge-ground systematic analysis framework was proposed and developed; (5) Patterned after an existing bridge in California, the framework was implemented with parametric studies addressing the procedure assumptions and potential retrofit bridge configurations.
Book Synopsis Post-earthquake Traffic Capacity of Modern Bridges in California by : Vesna Terzic
Download or read book Post-earthquake Traffic Capacity of Modern Bridges in California written by Vesna Terzic and published by . This book was released on 2010 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: The test results were then used to calibrate a finite element model of a bridge column. This bridge column model was incorporated into a hybrid model of a typical California overpass bridge and tested using the hybrid simulation technique. The finite element model of the typical California overpass bridge was validated using the data from hybrid simulations. The validated model of the typical bridge was used to evaluate its post-earthquake truck load capacity in an extensive parametric study that examined the effects of different ground motions and bridge modeling parameters such as the boundary conditions imposed by the bridge abutments, the location of the truck on the bridge, and the amount of bridge column residual drift. The principal outcomes of this study are the following findings.
Book Synopsis Bridge Maintenance, Safety, Management, Resilience and Sustainability by : Fabio Biondini
Download or read book Bridge Maintenance, Safety, Management, Resilience and Sustainability written by Fabio Biondini and published by CRC Press. This book was released on 2012-06-21 with total page 4119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge Maintenance, Safety, Management, Resilience and Sustainability contains the lectures and papers presented at The Sixth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2012), held in Stresa, Lake Maggiore, Italy, 8-12 July, 2012. This volume consists of a book of extended abstracts (800 pp) Extensive collection of revised expert papers on recent advances in bridge maintenance, safety, management and life-cycle performance, representing a major contribution to the knowledge base of all areas of the field.
Book Synopsis Seismic Design and Assessment of Bridges by : Andreas J. Kappos
Download or read book Seismic Design and Assessment of Bridges written by Andreas J. Kappos and published by Springer Science & Business Media. This book was released on 2012-04-18 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on the use of inelastic analysis methods for the seismic assessment and design of bridges, for which the work carried out so far, albeit interesting and useful, is nevertheless clearly less than that for buildings. Although some valuable literature on the subject is currently available, the most advanced inelastic analysis methods that emerged during the last decade are currently found only in the specialised research-oriented literature, such as technical journals and conference proceedings. Hence the key objective of this book is two-fold, first to present all important methods belonging to the aforementioned category in a uniform and sufficient for their understanding and implementation length, and to provide also a critical perspective on them by including selected case-studies wherein more than one methods are applied to a specific bridge and by offering some critical comments on the limitations of the individual methods and on their relative efficiency. The book should be a valuable tool for both researchers and practicing engineers dealing with seismic design and assessment of bridges, by both making the methods and the analytical tools available for their implementation, and by assisting them to select the method that best suits the individual bridge projects that each engineer and/or researcher faces.
Book Synopsis Numerical Evaluation of Forces on Piled Bridge Foundations in Laterally Spreading Soil by : Christopher McGann
Download or read book Numerical Evaluation of Forces on Piled Bridge Foundations in Laterally Spreading Soil written by Christopher McGann and published by . This book was released on 2013 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: The response of piled bridge foundations to liquefaction-induced lateral soil deformation is an important design consideration in seismically active regions. Recent research and case history data suggest that three-dimensional deformation of the approach embankment can significantly influence the loads placed on the embedded foundations during a flow failure or lateral spreading event. For example, the 2010 Maule earthquake in Chile caused widespread lateral spreading in the soil surrounding the Mataquito river bridge, however, only insignificant structural damage was observed in the bridge itself. The discrepancy between the amount of soil deformation and structural damage suggests that design procedures for this load case that do not make adequate consideration for 3D soil deformation mechanisms may lead to overly conservative and expensive design solutions. Finite element models of the Mataquito river bridge are created using the OpenSees computational framework to investigate the reduction in foundation loads during lateral spreading implied by the minimal structural damage at the site. These models include beam on nonlinear Winkler foundation models, dynamic effective stress models of the bridge-foundation-soil system in plane strain, and 3D models of the southern bridge abutment, approach embankment, and surrounding soil. This numerical work focuses on the development of efficient element formulations and appropriate mesh configurations to minimize computational effort, and seeks to frame the load reduction mechanisms in the context of a simplified analysis procedure for the lateral spreading load case. The results of the numerical models for the Mataquito bridge, along with a parameter study conducted using a second set of 3D finite element models, indicate that consideration for the 3D geometry of the bridge site results in tangible reductions in foundation bending demands and abutment displacements compared to those returned by a plane strain description of the problem. This reduction increases as the depth of the liquefiable layer and the effective width of the approach embankment are decreased. An approach is proposed to estimate the reductions in abutment displacement and associated foundation bending demands for a given site geometry, and an existing simplified analysis procedure is modified to better consider the findings of this work.
Book Synopsis Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground by : Ross W. Boulanger
Download or read book Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground written by Ross W. Boulanger and published by . This book was released on 2006 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop on Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground, held in Davis, California, March 16-18, 2005. Sponsored by the Pacific Earthquake Engineering Research Center; University of California at Berkeley; Center for Urban Earthquake Engineering; Tokyo Institute of Technology; Geo-Institute of ASCE. This collection contains 25 papers that discuss physical measurements and observations from earthquake case histories, field tests in blast-liquefied ground, dynamic centrifuge model studies, and large-scale shaking table studies. Papers contain recent findings on fundamental soil-pile interaction mechanisms, numerical analysis methods, and reviews and evaluations of existing and emerging design methodologies. This proceeding provides comprehensive coverage of a major issue in earthquake engineering practice and hazard mitigation efforts.
Author :fib Fédération internationale du béton Publisher :fib Fédération internationale du béton ISBN 13 :2883941084 Total Pages :124 pages Book Rating :4.8/5 (839 download)
Book Synopsis Probabilistic performance-based seismic design by : fib Fédération internationale du béton
Download or read book Probabilistic performance-based seismic design written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2012-05-07 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last ten to fifteen years a vast amount of research has been undertaken to improve on earlier methods for analysing the seismic reliability of structures. These efforts focused on identifying aspects of prominent relevance and disregarding the inessential ones, with the goal of producing methods that are both more efficient and easier to use in practice. Today this goal can be said to be substantially achieved. During these years scientific activity covered all of the many aspects involved in such a multi-disciplinary problem, ranging from seismology, to geotechnics, to structural analysis and economy, all of them to be consistently organised into a probabilistic framework. As the output of this research was dispersed into a multitude of technical papers, fib Commission 7 thought it worthwhile to select the essential aspects of this large body of knowledge and to present them into a coherent and accessible document for structural engineers. To this end a task group of specialists was formed, whose qualifications come from their personal involvement in the above-mentioned developments throughout this period of time. From its inception the group decided that the bulletin should have had a distinct educational character and provide a clear overview of the methods available. The outcome is a compact volume that starts by introducing the concepts and definitions of performance-based engineering, continues with two chapters on assessment and design, respectively, presenting the methods in detail accompanied by illustrative examples, and concludes with an appendix with sample programming excerpts for their implementation. It is believed that at present fib Bulletin 68 represents a unique compendium on probabilistic performance-based seismic design.
Book Synopsis Seismic Design of Highway Bridge Foundations by : Ignatius Lam
Download or read book Seismic Design of Highway Bridge Foundations written by Ignatius Lam and published by . This book was released on 1986 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Cooperative Highway Research Program Publisher :Transportation Research Board ISBN 13 :0309067537 Total Pages :55 pages Book Rating :4.3/5 (9 download)
Book Synopsis Comprehensive Specification for the Seismic Design of Bridges by : National Cooperative Highway Research Program
Download or read book Comprehensive Specification for the Seismic Design of Bridges written by National Cooperative Highway Research Program and published by Transportation Research Board. This book was released on 2002 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of the Performance of Piled Bridge Abutments Affected by Liquefaction-induced Ground Deformations Through Centrifuge Tests and Numerical Analysis Tools by : Richard James Armstrong
Download or read book Evaluation of the Performance of Piled Bridge Abutments Affected by Liquefaction-induced Ground Deformations Through Centrifuge Tests and Numerical Analysis Tools written by Richard James Armstrong and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Deformations of a bridge approach embankment due to earthquake-induced liquefaction in the underlying soil can impose large loads or demands on the piled abutment and pile foundations embedded through the embankment. However, because the piled foundation is embedded through an embankment of finite width, the foundation may actually restrain the movement of the embankment and thus create smaller displacements and loads on the piled foundation than would be expected based on analyses that uncouple the embankment deformations from the bridge response. To investigate this phenomenon, three centrifuge tests were conducted. Each test modeled two identical bridge approach embankments underlain by liquefied soil, with a total of six embankments modeled. The embankments were constructed of dry sand and underlain by saturated loose sand, which liquefied during shaking. Each centrifuge test included one embankment with a pile group at its crest and one embankment without a pile group. Results from the centrifuge tests provided physical evidence that the resisting forces from piles can reduce the embankment displacements resulting from earthquake-induced liquefaction in the underlying soils. This beneficial mechanism, called "pile pinning," should be included in practice when analyzing or designing piled bridge abutments in liquefiable ground, as it could result in significant economic savings (e.g., soil remediation or foundation retrofit). Two tools to account for this pile-pinning effect in design are: (1) equivalent static analyses (ESA) and (2) non-linear deformation analyses (NDA). Both ESA and NDA were used to analyze these centrifuge tests, with the purpose of evaluating these tools' predictive capabilities. For these centrifuge tests, ESA significantly over-predicted displacements and demands on the piles, whereas NDA provided a better comparison (although still with a tendency to over-predict). The better predictive capability of NDA was attributed to several modeling capabilities not possible with ESA. The relative merits of ESA and NDA for current practice depend on how decisions in design may be affected. Future advances can be expected with NDA methods, including improvements in the constitutive models, numerical methods, and software usability. Future advances are unlikely to be realized with ESA methods given their inherent simplifications of the physical processes.
Book Synopsis Toward Developing an Engineering Procedure for Evaluating Building Performance on Softened Ground by : Shideh Dashti
Download or read book Toward Developing an Engineering Procedure for Evaluating Building Performance on Softened Ground written by Shideh Dashti and published by . This book was released on 2009 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis and Design for Inelastic Structural Response of Extended Pile Shaft Foundations in Laterally Spreading Ground During Earthquakes by : Arash Khosravifar
Download or read book Analysis and Design for Inelastic Structural Response of Extended Pile Shaft Foundations in Laterally Spreading Ground During Earthquakes written by Arash Khosravifar and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiences from past earthquakes have shown that lateral spreading associated with liquefaction of cohesionless soils can be a cause of severe damage to bridge foundations. Large diameter extended pile shafts can be an effective bridge foundation choice for areas subjected to lateral spreading because they offer greater stiffness and strength relative to the magnitude of lateral spreading loads that can develop against them. A limited degree of plastic hinging below the ground surface may be allowable in design of extended pile shafts. Issues for design for extended pile shafts include: (a) how to estimate the demands due to superstructure inertia and lateral spreading in liquefied soils, and (b) how to combine these two loads in estimating the local and global inelastic demands on the structure. Studies of the response of pile foundations and pile-supported structures in liquefiable soils using physical models, numerical models, and case studies have provided the basis for a number of design recommendations. The guidance is, however, quite varied regarding how lateral spreading and superstructure inertial loads should be combined in design. To answer the above questions a series of Nonlinear Dynamic Finite Element Analyses (NDA) have been performed to investigate inelastic response of extended pile shafts subjected to liquefaction-induced lateral spreading, covering a range of soil, pile, and ground motion conditions. The results of NDA were first used to show that combined effects of lateral spreading and superstructure inertia produce larger demands than are produced by either loading case alone, such that the combined demand cannot be enveloped by analyzing the two load cases separately. The results were then used to evaluate current equivalent static analysis (ESA) method (Caltrans, 2008), with the relatively poor agreement illustrating the limitations of methods that do not combine the two loads. The results of NDA parametric study were then used to develop and calibrate an ESA procedure. The ESA procedure addresses both the nonliquefaction and liquefaction cases, and includes criteria that identify conditions which tend to produce excessive demands or collapse conditions. Finally, a series of three-dimensional (3D) Nonlinear Dynamic Finite Element Analyses (NDA) were performed to examine inelastic behavior of large diameter extended pile shafts subjected to earthquake shaking and liquefaction-induced lateral spreading. The purpose of these analyses was to evaluate the differences between 2D and 3D simulations, understand the source of any differences, and evaluate whether those differences would affect design recommendations for Equivalent Static Analysis (ESA).
