Mechanical performance and failure mode judgment criteria of grouted sleeve connectors considering large deformation and grouting compactness
Year: 2024
Type: article
Abstract: Three groups of 36 grouted sleeve connector (GSC1) specimens with different grouting compactness were experimentally investigated under monotonic tension and large-deformation reciprocating tension-compression. The experimental results showed that the failure mode of GSCs contains the tensile fracture of the steel bar (Failure Mode I) and bond-slip failure (Failure Mode II). The yield strength, ultimate strength, and elongation of GSCs gradually decreased, while residual deformation increased as grouting compactness decreased. The average ultimate strength of GSCs with 90% grouting compactness was 561.61 MPa, which was a 124.46% enhancement compared to GSCs with 60% grouting compactness. The effect of the loading method mainly affected GSCs’ residual deformation, which increased with the cycle number of large-deformation reciprocating loadings at consistent grouting compactness of specimens. Subsequently, based on the effects of grouting compactness and large deformation on the mechanical performance of GSCs, this paper combined with the critical grouting compactness and fu/fsy to judge GSCs' failure mode, with steel bar diameters of 20 cm, which were determined to be 90% and 1.4, respectively.
Authors: Chen Wu, Xiaofei Xiao, Shenglan Ma, Chao Yang
Institutions: Fuzhou University, Fujian University of Technology
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,110
OpenAlex ID: W4404516870