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doi:10.3850/978-981-08-7920-4_S2-S68-cd
Interval Long-Term Analysis of Concrete-Filled Steel Tubular Arches
Yong-Lin Pi1, Mark Andrew Bradford2 and Weilian Qu3
1Centre for Built Infrastructure Research, School of Civil and Environmental Engineering,
University of Technology, Sydney, Australia.
2Centre for Engineering Infrastructure and Safety, The University of New South Wales,
Sydney, Australia.
3Hubei Key Laboratory of Roadway Bridge and Structure Engineering,
Wuhan University of Technology, Wuhan, China.
ABSTRACT
It is shown that the visco-elastic effects of creep and shrinkage of the core concrete have
significant long-term effects on the in-plane structural behaviour of CFST arches under a
sustained load. The long-term radial and axial displacements, as well as the bendingmoment of
CFST arches increase substantially with time. A number of parameters for creep and shrinkage
of concrete core such as the creep coefficient, aging coefficient, and long-term shrinkage strain
have to be determined in advance in the analysis for the long-term structural responses of
CFST arches. It is known that these parameters are subjected to some amount of uncertainties,
which have to be considered in the analysis. Although the stochastic method can be used, the
method presumes the statistical parameters of the uncertain quantities to be known, which
have to be inferred from site measurements. However, the available data of such measurement
are often limited to permit the stochastic method to be used. This paper accounts for the
uncertainties of the parameters related to creep and shrinkage of concrete core by use of interval
modelling of their uncertainties. Both the upper and lower long-term responses of CFST arches
are derived.
Keywords: Analysis, Creep, Interval, Long-Term, Shrinkage, Uncertainty.
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