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In an inevitably occurring process, bridges possessing historic, artistic, and engineering significance deteriorate and must be maintained and rehabilitated in order to be kept in service. Ideally, all potentially significant bridges would be properly preserved and continue to beautify and bring character to their surroundings for years to come. However, funding is currently limited for transportation projects in general, and even more so for historic bridge preservation, which some may consider less critical in comparison to other transportation needs. Because of this limitation on resources, it is important that bridge-owning agencies use proper planning and management strategies in order to make the best use of available funding. This thesis presents a framework designed to assist agencies in this process. The framework is devised specifically for TxDOT for use in Tarrant County, Texas, but can be used as a model for agencies anywhere with some modifications to fit the inventory under evaluation. Included in the framework are a methodology for prioritization of bridges within an inventory, guidance on financial and legal procedures, identification of potential funding sources, summary and review of condition assessment practices and bridge mitigation strategies, a template for individual bridge preservation plans, and a framework for resource allocation within a bridge inventory. It can be concluded from this research that early detection of defects, preventive maintenance, condition assessment beyond routine inspection, adjustment of evaluation methodology, and use of engineering judgment when using numerical evaluation methods are critical components of proper management of historic bridges. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151260
"This synthesis report will be of interest to state highway design engineers and structural engineers, as well as environmental and historic preservation personnel in transportation agencies. It will also be of interest to state historic preservation offices, federal historic preservation agencies, ang engineering preservation consultants"--Avant-propos.
Explore Historic Bridge Design through the Perspective of Modern Engineering Historic Bridges:Evaluation, Preservation, and Management provides both an admiring and a technical account of bridge engineering through an exploration of several remarkable examples. From ancient China to modern-day Minnesota, the book di
This report presents a literature search, findings of a survey on the current state of historic bridge rehabilitation or replacement decision making by state and local transportation agencies, and nationally applicable decision-making guidelines for historic bridges. The guidelines are intended to be used as the protocol for defining when rehabilitation of historic bridges can be considered prudent and feasible and when it is not based on engineering and environmental data and judgments. The guidelines include identification of various approaches to bringing historic bridges into conformance with current design and safety guidelines/standards, and the effect or implications of remedial action on historical significance. There are currently no such nationally applicable decision-making guidelines, but there are a variety of state and local processes and policies for managing historic bridges. Effective practices for the various processes inform the nationally applicable guidelines. The guidelines are in narrative and matrix format.
The National Historic Covered Bridge Preservation Program (NHCBP) includes preservation of covered bridges that are listed, or are eligible for listing, on the National Register of Historic Places. It also advocates research for better means of restoring and protecting historic covered bridges, using advanced technology. The book is aimed at the highest form of historic preservation: maintaining the bridge not only physically, but also functionally. While the builder's original form is preserved, the structure continues to serve as a real bridge and not a historical relic. The technology being investigated uses glass-fibre reinforced polymer (GFRP) products to increase the strength of the members with minimal increases in x-section. The study also looks at ways to mask the use of the GFRP components. This study is just the beginning of research on this topic. The concept will be refined and amplified in future projects. The book is intended primarily for engineers, contractors, researchers, consultants, bridge owners, and historic bridge preservationists to help them keep these historic structures in full service.
S2A majority of the covered wooden bridges in United States were built in the mid -1800s. These structures represent a unique cultural and technological heritage from that era. Over time, these bridges have been deteriorated by microorganisms and insects or damaged by acts of vandalism and arson. The National Historic Covered Bridge Preservation (NHCBP) Program sponsored by the Federal Highway Administration (FHWA) provides funds to support preservation and restoration efforts for historic covered bridges. The focus of the NHCBP Program is support and technology transfer efforts to preserve, restore and protect covered bridges in conjunction with providing educational resources to the general public. In this paper, an overview of NHCBP research on the durability and wood protection of covered bridges is provided. Research results assist the general public, field investigators and states in their efforts to restore, repair and preserve national historic bridges.S3.
This guide provides bridge related definitions and corresponding commentaries, as well as the framework for a systematic approach to a preventive maintenance program. The goal is to provide guidance on bridge preservation. This guide is intended for Federal, State, and local bridge engineers, area engineers, bridge owners, and bridge preservation practitioners.