Performance of steel bridge deck pavement structure with ultra high performance concrete based on resin bonding

Abstract

This research investigated a pavement system on steel bridge decks that use epoxy resin (EP) bonded ultra-high performance concrete (UHPC). Through FEM analysis and static and dynamic bending fatigue tests of the composite structure, the influences of the interface of the pavement layer, reinforcement, and different paving materials on the structural performance were compared and analyzed. The results show that the resin bonded UHPC pavement structure can reduce the weld strain in the steel plate by about 32% and the relative deflection between ribs by about 52% under standard axial load conditions compared to traditional pavements. The EP bonding layer can nearly double the drawing strength of the pavement interface from 1.3 MPa, and improve the bending resistance of the UHPC structure on steel bridge decks by about 50%; the bending resistance of reinforced UHPC structures is twice that of unreinforced UHPC structure, and the dynamic deflection of the UHPC pavement structure increases exponentially with increasing fatigue load. The fatigue life is about 1.2 × 10⁷ cycles under a fixed force of 9 kN and a dynamic deflection of 0.35 mm, which meets the requirements for fatigue performance of pavements on steel bridge decks under traffic conditions of large flow and heavy load.

Graphical abstract

Keywords

steel bridge deck pavement / ultra-high-performance concrete / epoxy resin / composite structure / bending fatigue performance

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Acknowledgements

This work is jointly supported by the Natural Science Foundation of Jiangsu Province (Nos. BK20180113 and BK20181112), the Jiangsu Provincial Programme for High-Level Talents in Six Areas (No. XCL-CXTD-007), the Youth Programme of National Natural Science Foundation of China (Grant No. 51908285) and the Transformation Project of Scientific and Technological Achievements of Qinghai Province (No. 2017-SF-134).

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