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A platform for research: civil engineering, architecture and urbanism
Experimental characterisation of fatigue damage in foamed bitumen stabilised materials using dissipated energy approach
https://orcid.org/0000-0003-0839-1045
Highlights Sinusoidal cyclic four-point bending tests were performed on the FBS beams. DE approach was adopted to describe the flexural fatigue behaviour of FBS materials. Key issues in the analytical calculation of DE using machine-generated data were highlighted. New empirical equations were proposed to determine DE, RDEC, PV and CDE of FBS materials. CDE and the number of load cycles to the final flexural fatigue rupture of FBS beams are highly correlated.
Abstract Foamed bitumen stabilisation (FBS) of degraded pavements has become popular in recent times. Although the common failure mechanism of FBS materials under repeated heavy traffic loads has been identified as bottom-up fatigue cracking, further research is required to better model their performance characteristics. In this study, the four-point bending test was performed under both stress-controlled and strain-controlled modes to characterise the flexural fatigue performance of FBS beams. The dissipated energy (DE) approach was adopted to describe the flexural fatigue behaviour of FBS materials. This paper presents the issues in conventional DE calculation methods and suggests new empirical equations to more accurately determine the DE, the ratio of DE change, the plateau value and the cumulative dissipated energy (CDE) of FBS materials. The analysis of experimental results revealed that the CDE and the number of load cycles to the final flexural fatigue rupture of FBS beams are highly correlated.
Experimental characterisation of fatigue damage in foamed bitumen stabilised materials using dissipated energy approach
https://orcid.org/0000-0003-0839-1045
Highlights Sinusoidal cyclic four-point bending tests were performed on the FBS beams. DE approach was adopted to describe the flexural fatigue behaviour of FBS materials. Key issues in the analytical calculation of DE using machine-generated data were highlighted. New empirical equations were proposed to determine DE, RDEC, PV and CDE of FBS materials. CDE and the number of load cycles to the final flexural fatigue rupture of FBS beams are highly correlated.
Abstract Foamed bitumen stabilisation (FBS) of degraded pavements has become popular in recent times. Although the common failure mechanism of FBS materials under repeated heavy traffic loads has been identified as bottom-up fatigue cracking, further research is required to better model their performance characteristics. In this study, the four-point bending test was performed under both stress-controlled and strain-controlled modes to characterise the flexural fatigue performance of FBS beams. The dissipated energy (DE) approach was adopted to describe the flexural fatigue behaviour of FBS materials. This paper presents the issues in conventional DE calculation methods and suggests new empirical equations to more accurately determine the DE, the ratio of DE change, the plateau value and the cumulative dissipated energy (CDE) of FBS materials. The analysis of experimental results revealed that the CDE and the number of load cycles to the final flexural fatigue rupture of FBS beams are highly correlated.
Experimental characterisation of fatigue damage in foamed bitumen stabilised materials using dissipated energy approach
https://orcid.org/0000-0003-0839-1045
Highlights Sinusoidal cyclic four-point bending tests were performed on the FBS beams. DE approach was adopted to describe the flexural fatigue behaviour of FBS materials. Key issues in the analytical calculation of DE using machine-generated data were highlighted. New empirical equations were proposed to determine DE, RDEC, PV and CDE of FBS materials. CDE and the number of load cycles to the final flexural fatigue rupture of FBS beams are highly correlated.
Abstract Foamed bitumen stabilisation (FBS) of degraded pavements has become popular in recent times. Although the common failure mechanism of FBS materials under repeated heavy traffic loads has been identified as bottom-up fatigue cracking, further research is required to better model their performance characteristics. In this study, the four-point bending test was performed under both stress-controlled and strain-controlled modes to characterise the flexural fatigue performance of FBS beams. The dissipated energy (DE) approach was adopted to describe the flexural fatigue behaviour of FBS materials. This paper presents the issues in conventional DE calculation methods and suggests new empirical equations to more accurately determine the DE, the ratio of DE change, the plateau value and the cumulative dissipated energy (CDE) of FBS materials. The analysis of experimental results revealed that the CDE and the number of load cycles to the final flexural fatigue rupture of FBS beams are highly correlated.
Experimental characterisation of fatigue damage in foamed bitumen stabilised materials using dissipated energy approach
Pitawala, Sameera (author) / Sounthararajah, Arooran (author) / Grenfell, James (author) / Bodin, Didier (author) / Kodikara, Jayantha (author)
Construction and Building Materials ; 216 ; 1-10
2019-04-29
10 pages
Article (Journal)
Electronic Resource
English
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