00820982

Component

https://doi.org/10.3141/1770-19

http://scholar.google.com...dani&publication_year=2001

Structural composite lumber (SCL) is a family of newly engineered wood products finding increasing use in highway bridge applications. The advantages of SCL are high strength, flexibility of sizes and shapes, stiffness, and excellent treatability with preservatives. The main concerns in SCL bridge applications are the effects of moisture, exposure to ultraviolet light, and varying temperature and humidity levels on the long-term durability of the bridge members. To document these effects, monitoring of full-scale SCL T-beam bridge members was performed under ambient conditions and an accelerated aging process. A total of 16 beams were monitored under exposed weather conditions with frequent wetting and drying. Variables in the experiment were lumber type (Douglas fir and southern yellow pine), SCL type [laminated veneer lumber (LVL) and parallel strand lumber (PSL)], and preservative type [chromium copper arsenate (CCA) and pentachlorophenol (penta)]. The moisture content of the SCL, ambient temperature, humidity, and the general condition of the beams were monitored. The experiment concluded with the determination of an applicable SCL member for bridge applications. Although most of the members were found to be adequate, a Douglas fir CCA-treated LVL member was found to be the most suitable.

This paper appears in Transportation Research Record No. 1770, Design of Structures 2001.

English

p. 149-154

2001

Transportation Research Record

0309072328

Figures (4) ; Photos (8) ; References (9) ; Tables (1)

Accelerated weathering; Durability; Highway bridges; Humidity; Laminated wood; Moisture content; Prototype tests; Stiffness; Strength of materials; T beams; Temperature; Wood preservatives; Wooden bridges

Structural composite lumber

Bridges and other structures; Design; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls; I35: Miscellaneous Materials

TRIS, TRB, ATRI

Dec 10 2001 12:00AM

• BRIDGE SAFETY MONITORING USING COUPLED CURRENT DEVICE IMAGES
• COMPARATIVE STUDY OF AASHTO LOAD AND RESISTANCE FACTOR DESIGN DISTRIBUTION FACTORS FOR SLAB-GIRDER BRIDGES
• CONCRETE BRIDGE DECKS REINFORCED WITH FIBER-REINFORCED POLYMER BARS (WITH DISCUSSION AND CLOSURE)
• DEBRIS FLOW SIMULATION FOR HIGHWAY CROSS CULVERTS
• DESIGN OF PROFILE WALL THERMOPLASTIC PIPE FOR LOCAL BUCKLING (WITH DISCUSSION AND CLOSURE)
• DESIGN OF ROUTE 895 BRIDGE OVER JAMES RIVER IN VIRGINIA
• DIAGNOSTIC AND IN-SERVICE TESTING OF TRANSIT RAILWAY BRIDGE
• DYNAMIC LOADING OF BRIDGES
• EFFECT OF BEARING STIFFNESS AND SKEW ANGLE ON PERFORMANCE OF PRECAST CONCRETE BRIDGE
• EFFECTIVE USE OF PUBLIC INVOLVEMENT TO ACHIEVE AESTHETIC QUALITY IN BRIDGE DESIGN
• ESCAPE ADITS FOR TUNNEL SAFETY
• EXPERIMENTAL AND NUMERICAL EVALUATION OF BRACED-CHAIN EYEBAR BRIDGE
• EXPERIMENTAL CHARACTERIZATION OF METALLIC DAMPERS FOR SEISMIC RETROFIT OF HIGHWAY BRIDGES
• FATIGUE ASSESSMENT OF TRAFFIC SIGNAL MAST ARMS BASED ON FIELD TEST DATA UNDER NATURAL WIND GUSTS
• FIELD INVESTIGATION OF HIGH-PERFORMANCE CONCRETE BRIDGE DECKS IN SOUTH CAROLINA
• FIELD STUDIES OF STRENGTHENED TIMBER RAILROAD BRIDGE
• HEALTH MONITORING OF IRONTON-RUSSELL BRIDGE FOR RATING PURPOSES
• PERFORMANCE IN LIEU OF PRESCRIPTION IN BRIDGE DESIGN: CHANGI AIRPORT MEZZANINE BRIDGE, SINGAPORE
• PERFORMANCE OF FIVE-SPAN STEEL BRIDGE WITH FIBER-REINFORCED POLYMER COMPOSITE DECK PANELS
• PERFORMANCE OF GLASS FIBER-REINFORCED POLYMER DECK ON STEEL GIRDER BRIDGE
• PUBLIC PARTICIPATION AND BRIDGE TYPE SELECTION
• REPAIR AND STRENGTHENING OF CONCRETE STRUCTURES THROUGH APPLICATION OF CORRECTIVE POSTTENSIONING FORCES WITH SHAPE MEMORY ALLOYS
• RETROFITTING TO CORRECT UPLIFT OF CURVED GIRDER BRIDGE THROUGH FIELD TESTING AND ANALYSIS
• SOIL PRESSURE MEASURED AT VARIOUS FILL HEIGHTS ABOVE DEEPLY BURIED THERMOPLASTIC PIPE
• SUPERSTRUCTURE FLEXIBILITY AND DISINTEGRATION OF REINFORCED CONCRETE DECK SLABS: AN LRFD PERSPECTIVE
• TIME-DEPENDENT DEFLECTION OF THERMOPLASTIC PIPES UNDER DEEP BURIAL
• ULTRASONIC INSPECTION OF GLUED LAMINATED TIMBER FABRICATED WITH DEFECTS
• UPDATE ON ANALYTICAL AND EXPERIMENTAL RESEARCH ON BRIDGE RESTRAINERS
• VIRTUAL REALITY IMAGES TO AID PUBLIC INVOLVEMENT IN APPEARANCE OF ROADS AND BRIDGES