Mechanical Behaviour of Wagners Composite Fibre Bridge Decking under Point Load Testing

Weise, Matt Ryan (2018) Mechanical Behaviour of Wagners Composite Fibre Bridge Decking under Point Load Testing. [USQ Project]


Construction materials and techniques are constantly being engineered to become economical, stronger and more beneficial to the environment. In the modern scene of material innovation composite fibre materials are quickly becoming the go to material for a large range of applications, particularly that of the construction industry. This project specifically focuses on the use of Glass Fibre Reinforced Polymer (GFRP) materials for the use in road infrastructure and other high loading environments.

The aim of this research was to investigate the strength capacity and suitability of GFRP bridge decking when subjected to static loading, in particular point loading that represented the wheels of a design vehicle. A series of full-scale tests were conducted to measure the deflection and strength capacity of a panel design. A Finite Element Model (FEA) was created utilising Inventors 3D Modelling and Strand 7 FEA capacity in which the results produced were compared to those found in the experiment to validate both results. The project tested a wide range of loads as specified in AS5100 Bridge Design Code and Austroads Bridge Design Code as well as different combinations of bridge deck design. A literature review was used to determine the physical behaviour of the FRP materials and to determine the material strength properties to be used in the model.

The bridge deck showed impressive strength characteristic in which a span of 1850mm with a connecting diaphragm member was capable of sustaining the SM1600 load model. The bridge deck acted in a flexible manner in which failure of the span occurred when 370kN was applied to the centre of deck in which saw the delamination of the diaphragm. The panel failure was gradual yet unpredictable but was able to hold the failure point for a long duration of time and bounce back to its original position. Edge loading on the panel saw significant deflection while deflection increased when the presence of the diaphragm was absent. Differential deflection of the adjoining panels was minimal, for a 250kN point load the differential deflection of the panels measured 2.2mm.

The physical design properties were then used in Strand 7 (FEA Software) in which results agreed within a 78.57% Confidence level. The model was then used to predict a range of deflections for a given load and span.

Statistics for USQ ePrint 40754
Statistics for this ePrint Item
Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Civil)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: Karunasena, Karu
Date Deposited: 05 Sep 2022 03:45
Last Modified: 05 Sep 2022 03:45
Uncontrolled Keywords: Glass Fibre Reinforced Polymer (GFRP); road infrastructure; strength capacity

Actions (login required)

View Item Archive Repository Staff Only