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Numerical study on horizontally curved steel-concrete composite beams subjected to hogging moment

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Abstract

The horizontally curved continuous composite steel-concrete beams, for instance, curved continuous composite bridges, have excellent qualities, such as quick construction, good seismic performance, saving construction formwork and convenience in spatial arrangement etc. At present, the application research of this kind of structures is becoming more of a concern, but very few studies have been conducted to study the mechanical performance of composite beams subjected to combined hogging (negative) bending and torsion. The purpose of the present study is to investigate the effects of curvatures on both elastic and inelastic behaviours of curved continuous steel-concrete composite beams in the interior support regions. Based on the experimental observations in a straight composite beam, a three-dimensional FE model capable of analysing the composite beams subjected to negative bending moment is built. Further numerical studies on curved composite beams with different curvatures are performed in this study. Strength and load carrying capacity, sectional strain distribution and movement of composite neutral axis before and after cracking, as well as the strain results of longitudinal reinforcing bars are investigated. Besides, the interaction equation for ultimate bending and torsional moments is proposed.

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Correspondence to Teruhiko Yoda.

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Lin, W., Yoda, T. Numerical study on horizontally curved steel-concrete composite beams subjected to hogging moment. Int J Steel Struct 14, 557–569 (2014). https://doi.org/10.1007/s13296-014-3013-x

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  • DOI: https://doi.org/10.1007/s13296-014-3013-x

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