Efficient Load Rating and Quantification of Life-Cycle Damage of Indiana Bridges Due to Overweight Loads PDF Download
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Author: Hun Cha
Publisher:
ISBN: 9781622603862
Category :
Languages : en
Pages :
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Book Description
In this study, a computational approach for conducting durability analysis of bridges using detailed finite element models is developed. The underlying approach adopted is based on the hypothesis that the two main factors affecting the life of a bridge structure are the level of repetitive loading it sustains and the natural condition of the bridge that may be thought of as a combined effect of both, physical processes in the environment that cause deterioration and any maintenance activity undertaken to thwart such processes. Detailed finite element models of representative bridges are developed and subjected to a set of representative traffic loads repeatedly. Finite element model updation is used to characterize the evolution of damage over the lifetime of a bridge and real-life data from inspection reports of bridges is used to calibrate the durability models developed. The results of this approach may be used to evaluate the permit fee structure for overweight trucks and make informed decisions for asset management of the bridges in INDOT's inventory.
Author: Hun Cha
Publisher:
ISBN: 9781622603862
Category :
Languages : en
Pages :
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Book Description
In this study, a computational approach for conducting durability analysis of bridges using detailed finite element models is developed. The underlying approach adopted is based on the hypothesis that the two main factors affecting the life of a bridge structure are the level of repetitive loading it sustains and the natural condition of the bridge that may be thought of as a combined effect of both, physical processes in the environment that cause deterioration and any maintenance activity undertaken to thwart such processes. Detailed finite element models of representative bridges are developed and subjected to a set of representative traffic loads repeatedly. Finite element model updation is used to characterize the evolution of damage over the lifetime of a bridge and real-life data from inspection reports of bridges is used to calibrate the durability models developed. The results of this approach may be used to evaluate the permit fee structure for overweight trucks and make informed decisions for asset management of the bridges in INDOT's inventory.
Author: Robby Caspeele
Publisher: CRC Press
ISBN: 1351857568
Category : Technology & Engineering
Languages : en
Pages : 564
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Book Description
This volume contains the papers presented at IALCCE2018, the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE2018), held in Ghent, Belgium, October 28-31, 2018. It consists of a book of extended abstracts and a USB device with full papers including the Fazlur R. Khan lecture, 8 keynote lectures, and 390 technical papers from all over the world. Contributions relate to design, inspection, assessment, maintenance or optimization in the framework of life-cycle analysis of civil engineering structures and infrastructure systems. Life-cycle aspects that are developed and discussed range from structural safety and durability to sustainability, serviceability, robustness and resilience. Applications relate to buildings, bridges and viaducts, highways and runways, tunnels and underground structures, off-shore and marine structures, dams and hydraulic structures, prefabricated design, infrastructure systems, etc. During the IALCCE2018 conference a particular focus is put on the cross-fertilization between different sub-areas of expertise and the development of an overall vision for life-cycle analysis in civil engineering. The aim of the editors is to provide a valuable source of cutting edge information for anyone interested in life-cycle analysis and assessment in civil engineering, including researchers, practising engineers, consultants, contractors, decision makers and representatives from local authorities.
Author: Peng Lou
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 255
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Book Description
Highway agencies are responsible for the optimal expenditure of taxpayer dollars allocated to highway infrastructure. Truck size and weight are regulated by federal legislation and every state highway agency has its own legal load limits. Over the last two decades, both the frequency and weight of overweight trucks has kept increasing. Although the AASHTO Load and Resistance Factored Design (LRFD) Bridge Design Specifications mandates a design life of 75 years, the actual service life of bridges is lower and varies from one bridge site to another. Additionally, state agencies issue permits for trucks with gross vehicle weights that are above legal load limits. However, the effect of overweight trucks on the service life of bridge components is not explicitly quantified. This dissertation presents a rational approach to investigate the impact of truck loads on bridges in New Jersey through the utilization of bridge inspection reports, truck weight-in-motion (WIM) data, and the National Bridge Inventory (NBI) database. Actual bridge deterioration modes were identified from their respective inspection reports. Based on the condition ratings from NBI, the expected service life for each bridge component on various highways were estimated. In addition, WIM data in New Jersey were used to extract the loading on bridges. For bridge decks and prestressed concrete (P/C) girders, the correlation between the expected service life and truck loadings was performed and prediction functions for service life were proposed. For steel bridge girder, predicted service life was calculated through the remaining fatigue life assessment. Lastly, Bridge Life Cycle Cost Analysis (BLCCA) was conducted using two contrasting scenarios, one with and the other without overweight trucks, to quantify economic impact of overweight trucks on bridges. The results show that deterioration mode of prestressed concrete (P/C) girders was the corrosion near the beam-ends induced by cracking and spalling while the deterioration mode of reinforced concrete deck was the punching shear failure. Overall, P/C girders have better performances than steel girders. During the lifetime of the bridge, the deterioration of P/C girders would be accelerated once cracking is initiated. The expected service life of P/C bridges was greatly affected by the condition of the bridge deck. Lastly, the results indicated that overweight trucks caused more damage on NJ state highways compared with interstate highways due to a larger proportion of overweight trucks, heavy wheel loads from overweight trucks, and fewer axles per truck.
Author: Piya Chotickai
Publisher:
ISBN: 9781622601813
Category :
Languages : en
Pages :
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Book Description
Author: Rafael Armendariz
Publisher:
ISBN: 9781622604999
Category :
Languages : en
Pages :
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Book Description
The inspection and evaluation of bridges in Indiana is critical to ensure their safety to better serve the citizens of the state. Part of this evaluation includes bridge load rating. Bridge load rating, which is a measure of the safe load capacity of the bridge, is a logical process that is typically conducted by utilizing critical information that is available on the bridge plans. For existing, poorly-documented bridges, however, the load rating process becomes challenging to adequately complete because of the missing bridge information. Currently, the Indiana Department of Transportation (INDOT) does not have a prescribed methodology for such bridges. In an effort to improve Indiana load rating practices INDOT commissioned this study to develop a general procedure for load rating bridges without plans. The general procedure was developed and it was concluded that it requires four critical parts. These parts are bridge characterization, bridge database, field survey and inspection, and bridge load rating. The proposed procedure was then evaluated on two bridges in Indiana that do not have plans as a proof of concept. As a result, it was concluded that load rating of bridges without plans can be successfully completed using the general procedure. A flowchart describing the general procedure was created to make the load rating process more user-friendly. Additional flowcharts that summarize the general procedure for different type of bridges were also provided.
Author: Mark Bowen
Publisher:
ISBN: 9781622603220
Category :
Languages : en
Pages :
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Book Description
All states are required to load rate and post bridges in order to comply with federal standards. Load ratings are performed in order to determine the safe live load capacity of a bridge, considering the existing conditions of the bridge. Based on the load ratings, the bridge is evaluated for load posting or strengthening. The Indiana Department of Transportation (INDOT) was notified that their practice for load rating and posting did not satisfy 23 CFR 650.313. The purpose of this study was to summarize and compare load rating and posting procedures used in other states and to provide recommendations and information necessary to modify the load rating and posting procedures in INDOT's Bridge Inspection Manual (Part 3: Load Rating) in order to satisfy 23 CFR 650.313.In order to understand how load rating and posting is performed in other states, department of transportation (DOT) manuals were examined, questionnaires were sent to states, and additional states of interest were surveyed. The American Association of State Highway and Transportation Officials (AASHTO) The Manual for Bridge Evaluation, Second Edition, which is the current specification for load rating and posting bridges was reviewed, as well as older AASHTO bridge evaluation manuals. Based on this information, revisions were proposed to the INDOT Bridge Inspection Manual (Part 3: Load Rating) in order to eliminate current deficiencies.
Author: Donald Woodrow White
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
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Book Description
Author: Nathan Tirk
Publisher:
ISBN:
Category :
Languages : en
Pages : 232
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Book Description
Probabilistic analysis of civil structures is primarily concerned with the quantification of uncertainty that results from random variations in demand and capacity throughout the service life of structures. In the case of bridges, one important source of uncertainty comes from demands induced by vehicles, i.e. vehicular live loads. Current bridge design guidelines (AASHTO LRFD) are operationally deterministic and define the vehicular live load model (HL-93) that is intended to provide a level of demand consistent with a predetermined level of reliability (reliability index of 3.5 or larger in 75 years) for most bridges.
Author: Milhan Moomen
Publisher:
ISBN: 9781622604159
Category :
Languages : en
Pages :
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Book Description
An effective bridge management system that is equipped with reliable deterioration models enables agency engineers to carry out monitoring and long-term programming of bridge repair actions. At the project level, deterioration models help the agency to track the physical condition of bridge elements and to specify when bridge maintenance, rehabilitation and replacement can be expected. Also, with reliable deterioration models, the agency can customize bridge repair or replacement schedules that incorporate element condition, functional obsolescence, and pre-specified performance thresholds. At the network level, component-specific deterioration models are useful for system-wide needs assessment over a specified future time horizon, and to quantifying the system-wide consequences of funding shortfalls or funding increases in terms of specified performance measures including average values of bridge condition and remaining service life. The bridge deterioration models that are currently in use in the Indiana Bridge Management System were developed over two decades ago. Since then, significant changes have taken place in inspection methods, technologies used, advanced statistical tools for data analysis. Also, because of the lack of reliable data, such items as the truck traffic and climate conditions were not included in past modeling efforts. In recent years, these obstacles have been minimized and therefore, there is an opportunity to update the deterioration models for the various bridge components. In addressing this research need, the present study developed families of curves representing deterioration models for bridge deck, superstructure, and the substructure. The National Bridge Inventory database was used, and the models use the NBI condition ratings as the response variable. The model families were categorized by administrative region, functional class, and superstructure material type. The explanatory variables include traffic volume and truck traffic, design type, and climatic condition, and design features. Deterministic and probabilistic models were developed.
Author: Fikret Necati Catbas
Publisher: Frontiers Media SA
ISBN: 2889662128
Category : Technology & Engineering
Languages : en
Pages : 212
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Book Description
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
