Study on Mechanical Behavior of Negative Bending Region Based Design of Composite Bridge Deck
Steel–concrete composite decks are paved by grid beams on the superstructure of Dongping Bridge. Bridge deck grid beams consist of three main longitudinal girders, secondary longitudinal girders, main beams, secondary beams, and composite decks (which consist of profiled steel sheet, shear connectors with perfobond strips, steel rebar and concrete with steel fiber). Shear connectors with perfobond strips are designed in Dongping Bridge to improve the longitudinal shear capability between profiled steel sheet and concrete. For the performance of deck system in structural negative bending region, three typical forms of load, namely, service load, fatigue load and failure load, are applied. The results show sufficient stiffness and high load-carry capacity of the deck system. The stress of shear connectors with perfobond strips under 10000 cycles and 2.99 million cycles of fatigue load appeared to be invariable, which indicates that PBL is of good anti-fatigue performance as shear connectors with perfobond strips reaches the corresponding yield strength before destroyed, with the yield load of 359.10 kN.
KeywordsSteel–concrete composite Bridge deck Perfobond rib shear connector Fatigue and ultimate bearing capacity Test Optimization design
The writers gratefully acknowledge financial support provided by the Science Foundation of China Postdoctor (Grant No. 2016M600352), the Science and Technology Agency of Zhejiang province (Grant No. 2015C33222), the Science Foundation of Shanghai Postdoctor (Grant No. 13R21421100).
- 2.Bayraktar A, Altunisik AC, Turker T (2016) Structural condition assessment of Birecik highway bridge using operational modal analysis. Int J Civil Eng 14(1A):35–46Google Scholar
- 5.Grandic IS, Grandic D, Bjelanovic A (2015) Evaluation of torsional stiffness in beam and slab bridge decks based on load testing. Int J Civil Eng 13(3A):255–266Google Scholar
- 6.JTG D62 2004 code for design of highway reinforced concrete and pre-stressed concrete bridge and culverts [S].Google Scholar
- 9.Millanes F, Bujalance EB, Dominguez JLM, Suarez JM (2014) Archidona viaduct: composite steel-concrete deck for a long railway bridge. Struct Eng Int 24(1):122–126Google Scholar
- 11.Ren J (2006) Experimental study on fatigue of composite steel-concrete structure [D]. Southwest Jiaotong University, ChengdouGoogle Scholar
- 12.Zhang Q, Li Q, Tang L (2007) Fracture mechanism and ultimate carrying capacity of shear connectors applied for steel-concrete joint segment of bridge pylon [J]. China J Highway Transp 20(1):85–90Google Scholar