Parametric study on the non-contact splices at drilled shaft to bridge column interface based on multiscale modeling approach

•Eleven noncontact splices with geometric inconsistency are designed.•The experimental observations are validated by multiscale FEM analysis.•The effect of concrete compressive strength is comparatively discussed.•Effect of lap spacing, stirrup ratio and lap length is considered.•The variation of st...

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Bibliographic Details
Published in:Engineering structures 2019-02, Vol.180, p.400-418
Main Authors: Chen, Hongbing, Masud, Mahadi, Sawab, Jamshaid, Huang, Hsuan Wen, Xu, Bin, Mo, Y.L., Hsu, Thomas T.C.
Format: Article
Language:English
Subjects:
Bridge substructure
Columns (structural)
Concrete strength
Design
FEM simulation
Finite element method
Interface between column and drilled shaft
Joints
Lap length
Mathematical models
Mechanical analysis
Multiscale modeling
Non-contact splices
Numerical analysis
Parametric statistics
Pattern analysis
Splice spacing
Stirrup ratio
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Summary:•Eleven noncontact splices with geometric inconsistency are designed.•The experimental observations are validated by multiscale FEM analysis.•The effect of concrete compressive strength is comparatively discussed.•Effect of lap spacing, stirrup ratio and lap length is considered.•The variation of structural stiffness and cracking mechanism is compared. The structural performance of large-scale rectangular column-circular drilled shaft interface using non-contact splices is investigated through experimental study and numerical analysis. The influences of lap spacing and the length of overlapped longitudinal bars, the stirrup ratio and the variation of concrete strength on the global mechanical response and mesoscale cracking pattern are analyzed. According to the provisions in current design guidelines, a total of eleven specimens are designed for parametric study. The macroscopic load-displacement curves, the cracking pattern of concrete of designed specimens are comparatively discussed. The experimental results matched well with that of the FEM analysis. The research findings can provide valuable guidance on the construction and design of non-contact lap splices with geometric irregularities in the following Phase II of this project.
ISSN:0141-0296
1873-7323
DOI:10.1016/j.engstruct.2018.11.054