Download or read book Optimizing System level Bridge Maintenance Rehabilitation and Replacement Decisions written by Kamal Muhammad Al-Subhi and published by . This book was released on 1989 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimizing System level Bridge Maintenance Rehabilitation and Replacement Decisions written by Kamal Muhammad Al-Subhi and published by . This book was released on 1989 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Facility level and System level Stochastic Optimization of Bridge Maintenance and Replacement Decisions Using History dependent Models written by Charles-Antoine Robelin and published by . This book was released on 2006 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development of Optimal Strategies for Maintenance Rehabilitation and Replacement of Highway Bridges Performance analysis and optimization written by Kumares Chandra Sinha and published by . This book was released on 1991 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Optimization Methods in System Level Bridge Management written by Haotian Liu and published by . This book was released on 2013 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2012, over 25% of the bridges in the United States were rated as structurally deficient or functionally obsolete. Moreover, 35% of bridges are serving beyond their theoretical design lifespan and the number has been projected to increase over the next decade. The imperative needs of improving the overall condition of the bridge system has been impeded by the shortage of funding available for bridge repairs and maintenance. In 2006 the gap between Federal Highway Administration's (FHWA) estimates to eliminate the bridge maintenance backlog and the actual appropriations to bridges for repairs and maintenance from the Highway Bridge Program was $43.4 Billion. In 2009, the gap increased to $65.7 Billion. Such conflict has made effective bridge management more critical than ever. In bridge management, agencies collect bridge condition data and develop deterioration models that predict the bridges' future conditions and associated costs, based on which maintenance, rehabilitation and reconstruction (MR & R) decisions are made. It is therefore critical to have accurate deterioration models. However, limited availability of data and incomplete understanding of the deterioration process result in inaccurate models, which lead to sub-optimal MR & R decisions and significant cost increases. To address the inaccuracy stemming from limited bridge condition data, researchers have proposed Adaptive Control (AC) methods that update the deterioration models successively as new data become available. The underlying belief is that agencies can obtain more accurate deterioration models through updating and subsequently improve their MR & R decisions and achieve cost savings. State-of-the-art bridge management systems, such as Pontis, use a class of AC procedures known as Certainty Equivalent Control (CEC). The procedure used in Pontis updates the transition probabilities (i.e., the parameters of the component deterioration models) after each condition survey, and uses the updated probabilities in subsequent planning of MR & R decisions. Unfortunately, CEC does not necessarily lead to more accurate models, or guarantee savings in system costs; in other words, updating of the type in Pontis is not necessarily beneficial. In the present dissertation, an AC method, Open-Loop Feedback Control (OLFC), is proposed for system-level bridge management. The performance of OLFC and the Pontis CEC is tested in a numerical study and empirical results show that OLFC has superior performance with respect to two criteria. In terms of improvement in model accuracy, the Pontis CEC yields systematic bias in model parameter estimates and therefore does not improve model accuracy. In all testing scenarios, the resulting deterioration models lead to faster deterioration than the true models. OLFC, on the other hand, results in consistent convergence to the true models in all testing scenarios and improves model accuracy. When evaluated by system costs, the Pontis CEC consistently results in higher system costs than the no-updating scenario. The increases are on the order of $180 Million at the level of the State of California. To the contrary, updating with OLFC consistently achieves system costs savings compared to the no-updating scenario, and results in system costs that do not differ significantly from the system costs when true models are used for MR & R decision-making. In addition, a computationally tractable optimization routine is developed for MR & R decision-making. The routine ensures strict conformity to system budget constraints and achieves satisfactory computational efficiency even given high levels of heterogeneity in bridge systems.
Download or read book Bridge Maintenance Safety Management and Life Cycle Optimization written by Dan Frangopol and published by CRC Press. This book was released on 2010-07-07 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge Maintenance, Safety, Management and Life-Cycle Optimization contains the lectures and papers presented at IABMAS 2010, the Fifth International Conference of the International Association for Bridge Maintenance and Safety (IABMAS), held in Philadelphia, Pennsylvania, USA from July 11 through 15, 2010.All major aspects of bridge maintenance, s
Download or read book Stochastic Optimization written by Ioannis Dritsas and published by BoD – Books on Demand. This book was released on 2011-02-28 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stochastic Optimization Algorithms have become essential tools in solving a wide range of difficult and critical optimization problems. Such methods are able to find the optimum solution of a problem with uncertain elements or to algorithmically incorporate uncertainty to solve a deterministic problem. They even succeed in fighting uncertainty with uncertainty. This book discusses theoretical aspects of many such algorithms and covers their application in various scientific fields.
Download or read book Optimal Investment Decision making for Highway Transportation Asset Management Under Risk and Uncertainty written by Zongzhi Li and published by . This book was released on 2007 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maintenance Monitoring Safety Risk and Resilience of Bridges and Bridge Networks written by Tulio Nogueira Bittencourt and published by CRC Press. This book was released on 2016-11-17 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maintenance, Monitoring, Safety, Risk and Resilience of Bridges and Bridge Networks contains the lectures and papers presented at the Eighth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2016), held in Foz do Iguaçu, Paraná, Brazil, 26-30 June, 2016. This volume consists of a book of extended abstracts and a DVD containing the full papers of 369 contributions presented at IABMAS 2016, including the T.Y. Lin Lecture, eight Keynote Lectures, and 360 technical papers from 38 countries. The contributions deal with the state-of-the-art as well as emerging concepts and innovative applications related to all main aspects of bridge maintenance, safety, management, resilience and sustainability. Major topics covered include: advanced materials, ageing of bridges, assessment and evaluation, bridge codes, bridge diagnostics, bridge management systems, composites, damage identification, design for durability, deterioration modeling, earthquake and accidental loadings, emerging technologies, fatigue, field testing, financial planning, health monitoring, high performance materials, inspection, life-cycle performance and cost, load models, maintenance strategies, non-destructive testing, optimization strategies, prediction of future traffic demands, rehabilitation, reliability and risk management, repair, replacement, residual service life, resilience, robustness, safety and serviceability, service life prediction, strengthening, structural integrity, and sustainability. This volume provides both an up-to-date overview of the field of bridge engineering as well as significant contributions to the process of making more rational decisions concerning bridge maintenance, safety, serviceability, resilience, sustainability, monitoring, risk-based management, and life-cycle performance using traditional and emerging technologies for the purpose of enhancing the welfare of society. It will serve as a valuable reference to all involved with bridge structure and infrastructure systems, including students, researchers and engineers from all areas of bridge engineering.
Download or read book Megacity Mobility written by Zongzhi Li and published by CRC Press. This book was released on 2021-12-14 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: World population growth and economic prosperity have given rise to ever-increasing demands on cities, transportation planning, and goods movement. This growth, coupled with a slower pace of transportation capacity expansion and deteriorated facility restoration, has led to rapid changes in the transportation planning and policy environment. These stresses are particularly acute for megacities where degradation of mobility and facility performance have reached alarming rates. Addressing these transportation challenges requires innovative solutions. Megacity Mobility grapples with these challenges by addressing transportation policy, planning, and facilities in a multimodal context. It discusses innovative short- and long-term solutions for meeting current and future mobility needs for the world’s most dynamic cities by addressing the influence of urban land use on mobility, 3D spiderweb transportation planning, travel demand management, multimodal transportation with flexible capacity, efficient capacity utilization driven by new technologies, innovative transportation funding and financing, and performance-based budget allocation using asset management principles. It discusses emerging issues, highlights potential challenges affecting proposed solutions, and provides policymakers, planners, and transportation professionals a road map to achieving sustainable mobility in the 21st century. Zongzhi Li is a professor and the director of the Sustainable Transportation and Infrastructure Research (STAIR) Center at Illinois Institute of Technology (IIT). Adrian T. Moore is vice president of policy at Reason Foundation in Washington, D.C., with focuses on privatization, transportation and urban growth, and more. Samuel R. Staley is the director of the DeVoe L. Moore Center in the College of Social Sciences and Public Policy at Florida State University.
Download or read book Bridge Strengthening and Rehabilitation written by Petros P. Xanthakos and published by Prentice Hall. This book was released on 1996 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive approach to the overall engineering discipline of bridge strengthening, rehabilitation and replacement. Includes extensive detail and examples of how to evaluate the condition of bridges. Provides detailed information on analyzing the cost-effectiveness and service life of proposed bridge repairs, and helps with the repair-vs.-replace decision. Offers comprehensive coverage of available methods for strengthening existing bridges. Civil engineers, transportation engineers, structural engineers and construction engineers involved in transportation structures.
Download or read book Transportation Research Record written by and published by . This book was released on 2004 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development of Optimal Strategies for Maintenance Rehabilitation and Replacement of Highway Bridges Cost analysis written by and published by . This book was released on 1991 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bridge Management Systems for Transportation Agency Decision Making written by Michael J. Markow and published by Transportation Research Board. This book was released on 2009 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study gathers information on current practices that senior managers at transportation agencies use to make network-level decisions on resource allocations for their bridge programs. In particular, the study explores how agency bridge management systems are employed in this process. Information was gathered through a review of literature on U.S. and international bridge management, a survey of U.S. and Canadian transportation agencies, and 15 in-depth interviews with state DOT executive and bridge managers.
Download or read book Transportation Asset Management written by Zongzhi Li and published by CRC Press. This book was released on 2018-08-31 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transportation asset management delivers efficient and cost-effective investment decisions to support transportation infrastructure and system usage performance measured in economic, social, health, and environmental terms. It can be applied at national, state, and local levels. This distinctive book addresses asset management for multimodal transportation, taking account of system component interdependency, integration, and risk and uncertainty. It sets out rigorous quantitative and qualitative methods for addressing system goals, performance measures, and needs; data collection and management; performance modeling; project evaluation, selection, and trade-off analysis; innovative financing; and institutional issues. It applies as easily to static traffic and time-dependent or dynamic traffic which exists on a more local level. It is written for transportation planners, engineers, and academia, as well as a growing number of graduate students taking transportation asset management courses.
Download or read book Resource Allocation Logic Framework to Meet Highway Asset Preservation written by John Wiegmann and published by Transportation Research Board. This book was released on 2012 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 736: Resource Allocation Logic Framework to Meet Highway Asset Preservation presents a logic framework for allocating limited highway asset preservation funds among competing demands in order to help maximize system performance. The report also presents a spreadsheet-based computational tool that implements the framework. Prototypical application scenarios and case-study examples illustrate how transportation agency staff may use the framework to assist resource allocation decision making"--Publication information.
Download or read book Bridge Integrated Analysis and Decision Support written by Al Bhorbanpoor and published by . This book was released on 2011 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2004, the Wisconsin Highway Research Program (WHRP) initiated project # 0092-04-15, entitled, "Bridge Integrated Analysis and Decision Support--Case Histories (Phase I)" at the University of Wisconsin-Milwaukee (UWM) to document the existing knowledge related to Wisconsin bridge incidents in the form of a database of case histories. That study was completed in 2007 where for the database for each case study included detailed information on the bridge, past repair and maintenance, description of the events, reporting, and initial and subsequent responses by the responsible parties, and any resulting remediation. The database entitled "Bridge Incident Response Database" (BIRD) is web-based and searchable with "keywords" and it is detailed in the final report (SPR # 0092-04-15) that was published in January 2008.
