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Guardrails For Use On Historic Bridges

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Guardrails For Use On Historic Bridges

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Author : Robert Frosch
language : en
Publisher:
Release Date : 2017-06-30

Guardrails For Use On Historic Bridges written by Robert Frosch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-30 with categories.

Bridges that are designated historic present a special challenge to bridge engineers whenever rehabilitation work or improvements are made to the bridges. Federal and state laws protect historically significant bridges, and railings on these bridges can be subject to protection because of the role they play in aesthetics. Unfortunately, original railings on historic bridges do not typically meet current crash-test requirements and typically do not meet current standards for railing height and size of permitted openings. The primary objective of this study is to develop strategies that can be used to address existing railings on historic bridges and to develop solutions that meet current design requirements. In addition to the modification, selection, and design of the bridge railing, the bridge deck is also impacted by changes made to the railing. Due to increased force levels recently required by AASHTO, deck overhangs require significantly more reinforcement than for past practice. These increases are being realized on all bridge decks and may pose particular challenges for the attachment of railing to historic bridges. Therefore, a secondary objective of this project is to investigate the design of the deck overhang and determine whether reduced amounts of reinforcement are possible. For Volume 1 (Replacement Strategies), three phases of research were conducted. First, an overview of current practice for addressing historic bridge railings was performed. Second, an investigation was conducted to document historic bridge railings in Indiana. Finally, rehabilitation solutions were developed to address the specific bridge railings found in Indiana. Based on this research, three retrofit strategies were developed which include an inboard railing, curb railing, and a simulated historic railing. These rehabilitation solutions can be used to address historic bridge railings not only in Indiana, but across the country. For Volume 2 (Bridge Deck Overhang Design), experimental testing of half-scale and full-scale overhang specimens was conducted, and the results were analyzed. Failures of in-service bridge railings were also evaluated. Based on this research, recommendations are provided for the more efficient and economic design of bridge deck overhangs. These recommendations are applicable not only for historic bridges, but for all concrete bridge decks.

Guardrails For Use On Historic Bridges

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Author : Robert Frosch
language : en
Publisher:
Release Date : 2017-06-30

Guidelines For Historic Bridge Rehabilitation And Replacement

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Author : Mary Elizabeth McCahon
language : en
Publisher: AASHTO
Release Date : 2008

Guidelines For Historic Bridge Rehabilitation And Replacement written by Mary Elizabeth McCahon and has been published by AASHTO this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Technology & Engineering categories.

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.

Route 66 Crossings

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Author : Jim Ross
language : en
Publisher: University of Oklahoma Press
Release Date : 2016-02-19

Route 66 Crossings written by Jim Ross and has been published by University of Oklahoma Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-02-19 with Architecture categories.

Route 66 is a beloved and much studied symbol of twentieth-century America. But until now, no book has focused on the bridges that spanned the rivers, creeks, arroyos, and railroads between Chicago and Santa Monica. In this handsome volume, Route 66 authority and veteran writer and photographer Jim Ross examines the origins and history of the bridges of America’s most famous highway, structures designed to overcome obstacles to travel, many of them engineered with architectural aesthetics now lost to time. Featuring hundreds of Ross's own photographs, Route 66 Crossings showcases bridges ranging in design from timber to steel and concrete, and provides schematics, maps, and global coordinates to help readers identify and locate them. Ross’s comprehensive accounting of structures along the Mother Road’s various alignments includes bridges still in use, those that have vanished or have been abandoned, and the few consciously preserved as monuments. He also recognizes ancillary structures that enhanced safety and helped facilitate traffic, such as railway grade separations, tunnels, and pedestrian underpasses. Ross seeks to encourage ongoing preservation of the structures that remain. In brilliant color and precise detail, Route 66 Crossings expands our knowledge of the bridges that linked America’s first all-weather national highway.

Historic Bridges

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Author : Hojjat Adeli
language : en
Publisher: CRC Press
Release Date : 2016-04-19

Historic Bridges written by Hojjat Adeli and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-19 with Technology & Engineering categories.

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 discusses the history and structural evaluation of bridges, as well as their preservation, and restoration. With chapters written by renowned engineers, this unique resource — Compares the techniques and materials used in building three railroad bridges that traversed the Mississippi at the same site in 1865, 1887, and 1910 Investigates a legendary stone-arch bridge constructed in Ancient China in 606 A.D. Demonstrates how historians and engineers in Milwaukee found an approach to new bridge design that balances modern design standards with aesthetic interpretation Details a collaborative team approach to historic bridge management in Minnesota Considers the design and repair process of rapidly disappearing wrought iron bridges Discusses preservation of stone masonry aqueducts on the Chesapeake and Ohio Canal An educational treatise for engineers and historical preservationists, this work includes a wealth of illustrations and scientific tables. Demonstrating historic engineering significance beyond their utilitarian function, the bridges encountered in these pages are true landmarks, as worthy of emulation as they are preservation.

Methods Of Modifying Historic Bridges For Contemporary Use

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Author : William Zuk
language : en
Publisher:
Release Date : 1980

Methods Of Modifying Historic Bridges For Contemporary Use written by William Zuk and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Bridges categories.

Studied by a team of experts in the fields of history, bridge engineering, architecture, and computer analysis were 21 old truss bridges of historical importance located in Virginia. These old bridges are narrow and have low load-carrying capacities, making them targets for replacement and destruction. On a case-by-case basis, the bridges were investigated as to their potentials for strengthening and widening for normal vehicular use. Also explored were non-vehicular uses as for conversion into craft centers, museums, restaurants, housing, bicycle structures, and the like, at either the present site or a new one. The wide array of possibilities for continued use of the old bridges described in this report show that old bridges do indeed have much useful life left in them and it is not always necessary that they be demolished.