www.wagner.com development of long span composite truss bridges marcus o'dempsey
TRANSCRIPT
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Development of long span composite truss bridges
Marcus O'Dempsey
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Contents
• WCFT products
• WCFT solutions
• Developing composite truss bridges
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WCFT Product
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Section properties
Physical properties Characteristic values
Insert
End Cap
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WCFT ProductProduct guide- Characteristic value of mechanical properties
and physical properties- ASTM 7290
Design guide- ASCE Pre-standard (final ver.)- Work examples
ASTM 7290 -Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composite for Civil Engineering Structural ApplicationsASCE Pre-Standard for Load and Resistance Factor Design (LRFD) of Pultruded Fiber Reinforced Polymer (FRP) Structures (Final) (2010)
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Electrical crossarm
Wagners Solutions
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Boardwalk
Wagners CFT Solutions
Marina
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Timber Bridge Rehabilitation
Wagners Solutions
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Timber Bridge Rehabilitation
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Timber Bridge Rehabilitation
Pile Strengthening Bridge Widening
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Composite Bridge
Wagners Solutions
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Baio Bridges, Whyanbeel QLD
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Engineering Development • Stage 1
– Truss composite bridges bridge– Post-cure bolt joint for 80°C design temperature
• Stage 2– Grout filled composite truss bridge for long span– Ambient cure bolt joint for 80°C design temperature
• Design criteria (AS2156, AS5100, AS1170)- Dead Load : 0.3 KPa- Live Load : 5.0 KPa (Pedestrian)- Vehicle load : 4 ton (Emergency vehicle at low speed)- Deflection Limit: L/250- Design temperature : up to 80 °C
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Stage 1 • Structural specification
Span: 12 - 14 meters / Height : 2.0 meterTop-chord - 2 x 125SHS / Bottom-chord - 2 x 125 SHS / Webs - 1 x 250BRB
• Bolted jointDevelop post-cure glue system for 80°C design temperature Evaluate design strength for both ambient and 80°C design temperature
• Truss systemPerformance under static design load (Proof loading: AS/NZ 1170.0)Prove fatigue performance with 1,000,000 cycles of loading
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Stage 2 • Structural specification
Span: 23 meters / Height : 2.2 metersTop-chord - 2 x Grout-filled 250 BRB / Bottom-chord - 2 x 250 BRB / Webs - 1 x 250 BRB
• Bolted jointFurther development, ambient cure glue system for eliminating post-cure procedure Evaluate design strength for the range of design temperature between ambient and 80°C
• Grout filled truss systemPerformance under static design load (Proof loading: AS/NZW 1170.0)Comparative study with and without grout-filling method
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Stage 1 - 1,000,000 cycles of loading (Fatigue)
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Stage 2 - Grout-filled truss (Comparative study)
31%
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Stages 1 and 2 - Bolted jointWith post-cure glue (Stage 1)
With ambient-cure glue (Stage 2)
# 10 repeated test results, $ Determined in accordance with ASTM D7290
Test results – Stage 2
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Stage 1 – Clewley Park FootbridgeToowoomba, QLD
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Stage 2 - Mercy Footbridge replacementDalby QLD
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