00804688

Component

https://doi.org/10.3141/1740-11

http://scholar.google.com...tter&publication_year=2000

Stress-laminated timber bridge decks have gained popularity in the United States in recent years. As with all wood exposed to the environment, wood for these decks must be treated with preservatives. There has been reluctance to build chromated copper arsenate (CCA)-treated wood bridges because of concerns about dimensional stability. Because no research has been undertaken to investigate the use of CCA-treated southern pine stress-laminated bridge decks, a good resource for economical rural bridges has remained untapped. The objective of the present study was to evaluate the performance of various wood preservatives on stress-laminated southern pine bridge decks. A total of nine decks with seven different preservatives were built and exposed to the environment for more than 2 years. Force levels in prestressing rods and wood moisture contents from each deck were continuously monitored. It was found that the short-term variations in the rod stress levels are less for decks with oil-type preservatives than for decks with CCA preservatives. The long-term performances of decks with both preservative types were found to be similar. The anchorage effect on deck performance was found to be negligible.

This paper appears in Transportation Research Record No. 1740, Structural Design Issues.

English

p. 85-95

2000

Transportation Research Record

0309067448

Figures (9) ; Photos (1) ; References (14) ; Tables (1)

Bridge decks; Laminated wood; Moisture content; Performance evaluations; Prestressing; Rods; Stresses; Timber; Wood preservatives; Wooden bridges

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB, ATRI

Jan 17 2001 12:00AM

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• ASPHALT PLUG JOINTS: REFINED MATERIAL TESTS AND DESIGN GUIDELINES
• ASPHALT SURFACES ON STEEL BRIDGE DECKS
• CONSTRUCTION CONSIDERATIONS FOR REPAIR OF BRIDGES WITH EXTERNALLY BONDED FIBER-REINFORCED PLASTIC MATERIAL
• EFFECT OF CYCLE-COUNTING METHODS ON EFFECTIVE STRESS RANGE AND NUMBER OF STRESS CYCLES FOR FATIGUE-PRONE DETAILS
• ESTIMATION OF SECOND-ORDER EFFECTS FOR POLE-TYPE STRUCTURES
• FIELD PERFORMANCE OF INTEGRAL ABUTMENT BRIDGE
• FIELD PERFORMANCE OF STRESS-LAMINATED TIMBER BRIDGES
• FIFTY YEARS OF TRB BRIDGE COMMITTEES
• HIGH-PERFORMANCE STEEL BRIDGE DESIGN AND COST COMPARISONS
• LARSA 2000: SEISMIC ANALYSIS OF BRIDGES WITH SEISMIC ISOLATION AND ENERGY DISSIPATION DEVICES
• NEW CARQUINEZ BRIDGE, NORTHEAST OF SAN FRANCISCO, CALIFORNIA: TECHNOLOGICAL DESIGN ADVANCEMENTS
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• PERFORMANCE EVALUATION OF COMPOSITE PRESTRESSED CONCRETE SLAB BRIDGES
• RESPONSES OF PLAIN AND STEEL FIBER-REINFORCED CONCRETE BEAMS TO TEMPERATURE AND MECHANICAL LOADS: EXPERIMENTAL STUDY
• RETROFIT OF AERODYNAMIC CABLE INSTABILITY ON A CABLE-STAYED BRIDGE: CASE STUDY
• ROAD SAFETY IN TUNNELS
• SEISMIC PERFORMANCE OF TIMBER BRIDGES
• UPGRADING MISSOURI TRANSPORTATION INFRASTRUCTURE: SOLID REINFORCED-CONCRETE DECKS STRENGTHENED WITH FIBER-REINFORCED POLYMER SYSTEMS
• URBAN DESIGN CONSIDERATIONS FOR THE NEW WOODROW WILSON MEMORIAL BRIDGE: COMPETITION-WINNING DESIGN FOR METROPOLITAN WASHINGTON, D.C.
• USE OF HIGH-PERFORMANCE CONCRETE FOR BRIDGE ABUTMENTS: A CASE STUDY