Development of long span composite truss bridges Marcus O'Dempsey

Contents WCFT products WCFT solutions Developing composite truss bridges

WCFT Product

Characteristic values Physical properties Characteristic values Section properties Insert End Cap

WCFT Product Product 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 Applications ASCE Pre-Standard for Load and Resistance Factor Design (LRFD) of Pultruded Fiber Reinforced Polymer (FRP) Structures (Final) (2010)

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Wagners Solutions Composite Bridge Get overall spec of Baio Bridge

Baio Bridges, Whyanbeel QLD

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

Stage 1 Structural specification Bolted joint Truss system Span: 12 - 14 meters / Height : 2.0 meter Top-chord - 2 x 125SHS / Bottom-chord - 2 x 125 SHS / Webs - 1 x 250BRB Bolted joint Develop post-cure glue system for 80°C design temperature Evaluate design strength for both ambient and 80°C design temperature  Truss system Performance under static design load (Proof loading: AS/NZ 1170.0) Prove fatigue performance with 1,000,000 cycles of loading

Stage 2 Structural specification Bolted joint Span: 23 meters / Height : 2.2 meters Top-chord - 2 x Grout-filled 250 BRB / Bottom-chord - 2 x 250 BRB / Webs - 1 x 250 BRB Bolted joint Further 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 system Performance under static design load (Proof loading: AS/NZW 1170.0) Comparative study with and without grout-filling method

Stage 1 - 1,000,000 cycles of loading (Fatigue)

Stage 2 - Grout-filled truss (Comparative study) 31%

Stages 1 and 2 - Bolted joint With post-cure glue (Stage 1) With ambient-cure glue (Stage 2) Test results – Stage 2 # 10 repeated test results, $ Determined in accordance with ASTM D7290  

Stage 1 – Clewley Park Footbridge Toowoomba, QLD

Stage 2 - Mercy Footbridge replacement Dalby QLD