Field performance of timber bridges

Field performance of timber bridges by James P Wacker Download PDF EPUB FB2

Further improving efficiency and economy of timber bridge design, fabrication, and construction. This report is 16th in a series of reports that documents the field performance of timber bridges.

It describes the develop-ment, design, construction, and field performance of the North Siwell Road bridge located in Hinds County, Missis-sippi.

The performance of the bridge was monitored continuously for approximately 2 years, beginning shortly after installation. Performance monitoring involved collecting and evaluating data pertaining to the moisture content of the wood deck, the force level of the stressing bars, the deck vertical creep, and the behavior of the bridge under static-load conditions.

and field performance of the Mohawk Canal bridge in Yuma County, Arizona. The bridge constructed in Augustis a double-lane, single-span, stress-laminated deck approxi-mately m (21 ft) long and m (34 ft) wide. The laminations are Combination 16F-V3 Douglas Fir, glued-laminated timber (glulam) beams.

Characteristics of the. Field Performance of Timber Bridges: A National Study Brian Brian K. Brashaw Program Director University of Minnesota Duluth, Natural Resources Research Institute Duluth, MN, USA structures i [email protected] James Wacker Research Engineer USDA Forest Service, Forest Products Lab, Madison, WI, USA [email protected] and bridges.

Author: Karen Droste Created Date: 9/30/ PM. The Dean, Hibbsville, and Decatur bridges were constructed in southern Iowa during Each bridge is a simple-span, stress-laminated deck superstructure, approximately m (24 ft) long, constructed from eastern cottonwood lumber.

The performance of each bridge was monitored for approximately 2 years, beginning shortly after by: 1. The bridge is unique in that it is the first known stress-laminated timber bridge to be constructed of hardwood lumber. The performance of the bridge was monitored con-tinuously for approximately 4 years, beginning at the time of installation.

BibTeX @MISC{Service96fieldperformance, author = {Forest Service and Sanborn Brook and Stress-laminated Deck Bridge and Paula D. Hilbrich Lee and Michael A. Ritter and James P. Wacker}, title = {Field Performance of Timber Bridges}, year = {}}.

Field performance of timber bridges. By James P. Wacker, Don Conger, Michael A. Ritter and Forest Products Laboratory (U.S.) Abstract "July "--T.p. es bibliographical references (p. 15).Mode of access: Internet Topics: Wooden bridges. More than 25% total length of railroad bridges carrying freights is made of timber trestles [3].

However, many of these in-service timber bridges were built more than 50 years [4]. Considering the. More and more clients are becoming interested in timber structures including bridges.

About bridges are built in Finland every year. However, only few of them are made of timber (Finnish Transport Agency ).

In order to show to the potential clients the abilities of timber in bridge structures, the case study was conducted. The steel beams. Field Performance of Timber Bridges: A National Study. Field Performance of Timber Bridges: A National Study.

As many engineers begin to implement life-cycle cost analyses within the preliminary bridge design phase, there is a significant need for more reliable data on the expected service life of highway bridges.

They are very few road timber bridges in France. Among them, the Merle bridge, built inis no doubt the most exceptional one. The choice of the architect H. David was to avoid any reference. FIELD PERFORMANCE OF STRESS-LAMINATED TIMBER BRIDGES. Stress-laminated timber bridges were introduced into the United States in the late s.

Since then this concept has been used for more than bridges constructed on roadways throughout the United by: 5. A description of timber bridge superstructure types and locations as well as the field inspection protocol employed by all inspectors is also provided.

Inspection results will be presented for the bridges included, by climate zone and by superstructure type, and. Timber material repair and replacement cost for timber bridges is a considerable expense to highway agencies in Iowa, especially to county road departments.

To address these needs, the objectives of this investigation was to study the field effectiveness of various treatment alternatives used on Iowa roadway projects and to determine if the current specifications and testing are adequate for.

Get this from a library. Field performance of timber bridges. 18, Byron stress-laminated truss bridge. [Habib Joseph Dagher; National Wood in Transportation Information Center (U.S.);] -- The Byron bridge was constructed in the fall of in Byron, Maine.

The bridge is a single-span, two-lane, stress-laminated truss structure approximately 46 ft long and 32 ft wide.

Stress-laminated timber bridges were first introduced in the United States in the late s. Since that time, the concept of stress-laminating has received a great deal of attention and hundreds of bridges have been built. Most of these bridges are located on rural low-volume roads.

Dynamic Field Performance of Glued Laminated Timber Bridges. To use and develop timber structures in transportation better, the U.S. government implemented several national programs starting in the early s to address the needs of the timber industry.

One need was to investigate the dynamic field performance of timber bridges in relation to Author: Jake Bigelow, Brent Phares, Terry J Wipf, Mike Ritter, Doug Wood. Get this from a library. Field performance of timber bridges. 19, North Yarmouth stress-laminated truss bridge. [Habib Joseph Dagher; National Wood in Transportation Information Center (U.S.);] -- The North Yarmouth bridge was constructed in the spring of in North Yarmouth, Maine.

The bridge is a single-span, two-lane, stress-laminated truss structure that is approximately 39 ft long and. Written for the general reader, this page hardcover book celebrates all aspects of timber truss bridges, with a particular focus on the bridges of New South Wales.

Each of the authors is an expert in their field, bringing engineering, historical and heritage perspectives to an intriguing subject. Written for the general reader, this page hardcover book celebrates all aspects of timber truss bridges, with a particular focus on the bridges of New South Wales.

Each of the authors is an expert in their field, bringing engineering, historical and heritage. Timber bridges are an excellent way to showcase the strength and durability of wood structures, even under harsh conditions, when material selection, design, construction and maintenance are done Size: KB.

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Written for the general reader, this page hardcover book celebrates all aspects of timber truss bridges, with a particular focus on the bridges of New South Wales. Each of the authors is an expert in their field, bringing engineering, historical and heritage perspectives to an intriguing subject.

In New South Wales, engineers took advantage of native hardwood timber of rare dimensions. practice. One method to improve field performance of stress-laminated timber bridges is to learn from past ex­ perience and incorporate proven technology into future bridges.

The following is a summary of the field performance information related to stress-laminated timber bridges included in the FPL/FHWA bridge monitoring program.

The field performance of several stress-laminated timber bridges were monitored within a Nationwide Timber Bridge Monitoring Program, a cooperative effort by the U.S. Forest Service, Forest Products Laboratory and Federal Highway Administration.

Asphalt wearing surfaces are commonly used on timber bridges with transverse glued-laminated deck panel systems to help protect the timber components. However, poor performance of these asphalt wearing surfaces in the past has resulted in repeated repair and increased maintenance costs.

This report describes the field demonstration and testing of a newly-constructed, glued-laminated timber. This paper summarizes recent laboratory and field data studies on thermal performance of stress-laminated timber highway bridges.

Concerns about the reliability of stress-laminated deck bridges when exposed to sub-freezing temperatures triggered several investigations. Two laboratory studies were conducted to study the effects of wood species, preservative, moisture content, and temperature Cited by: 2.

Handbook on structural timber design to Eurocode 5 (IS EN ) rules including strength capacity tables for structural elements James Harrington1, Malcolm Jacob and Colin Short 1 James Harrington and Associates, Four One The Rise, Mount Merrion, Co Dublin.

Tel: (01). Roads and Maritime is pleased to release The Timber Truss Bridge Book, a definitive account of this group of heritage assets, with a focus on the timber truss bridges of NSW. All of the authors are experts in their field and bring engineering, historical and heritage perspectives to an intriguing subject.Christopher J.

Mettem worked for many years as an engineering consultant at TRADA and has led many research projects in timber structures, composites and connections, conservation work and timber bridges. Through contracts with government agencies he worked in Africa, Central and South America and in the UK with the Highways Agency.5/5(1).References and Other Resources.

References. Other Resources. Figure Power house replica, Johnson, VT. "Comparative Performance of Timber Bridges," ASCE Journal of Structural Engineering, Vol.and R. Winnett, "Field Performance of Timber Bridges Christian Hollow Stress-Laminated Box-Beam Bridge," FPL-RP