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A platform for research: civil engineering, architecture and urbanism
Bearing capacities and failure behaviors of bolt fasten wedge (BFW) active joints used in prestressed internal supports
https://orcid.org/0000-0002-4996-368X
Graphical abstract Display Omitted
Highlights A type of bolt fasten wedge (BFW) active joint is developed. Loading tests are conducted on four full-scale specimens. Load-displacement curves, load–strain curves, moment-rotation curves and failure modes of BFW joints are obtained. The field test is carried out and compared with the commonly used steel wedge active joint.
Abstract In this paper, the bearing capacities and failure behaviors of bolt-fastened wedge active joints used in prestressed internal supports are studied. A thorough exploration of the design of the bolt-fastened wedge active joint is elaborated, and an overview, working mechanism, stiffness analysis, parameters, and strength checking are provided. Then, loading tests are conducted on four full-scale specimens. One test is an axial compression test, while the other three tests are performed to analyze the long-axis (Y-axis) eccentricity, short-axis (X-axis) eccentricity, and biaxial (XY-axis) eccentricity. The load–displacement curve, load–strain curve, bending moment-rotation curve, and failure mode of each specimen are obtained. The experimental results show that the samples have good compressive properties and bending resistance. The impact of the X-axis and Y-axis eccentricities on the compressive ultimate bearing capacity is investigated, revealing a significant reduction in the former, while the latter has a minimal effect. Under bidirectional eccentricity, the weakening of the axial bending performance is most apparent. Bidirectional eccentric loads lead to a reduction in the yield load and initial compression stiffness to approximately 90% of those observed under unidirectional eccentricity. Finally, a field test is carried out to compare the constructability and load-holding performances of bolt-fastened wedge active joints with those of commonly used steel wedge active joints. It is demonstrated that the bolt-fastened wedge active joint effectively maintains prestress through bolt fastening, substantially enhancing the safety of foundation pit excavation construction.
Bearing capacities and failure behaviors of bolt fasten wedge (BFW) active joints used in prestressed internal supports
https://orcid.org/0000-0002-4996-368X
Graphical abstract Display Omitted
Highlights A type of bolt fasten wedge (BFW) active joint is developed. Loading tests are conducted on four full-scale specimens. Load-displacement curves, load–strain curves, moment-rotation curves and failure modes of BFW joints are obtained. The field test is carried out and compared with the commonly used steel wedge active joint.
Abstract In this paper, the bearing capacities and failure behaviors of bolt-fastened wedge active joints used in prestressed internal supports are studied. A thorough exploration of the design of the bolt-fastened wedge active joint is elaborated, and an overview, working mechanism, stiffness analysis, parameters, and strength checking are provided. Then, loading tests are conducted on four full-scale specimens. One test is an axial compression test, while the other three tests are performed to analyze the long-axis (Y-axis) eccentricity, short-axis (X-axis) eccentricity, and biaxial (XY-axis) eccentricity. The load–displacement curve, load–strain curve, bending moment-rotation curve, and failure mode of each specimen are obtained. The experimental results show that the samples have good compressive properties and bending resistance. The impact of the X-axis and Y-axis eccentricities on the compressive ultimate bearing capacity is investigated, revealing a significant reduction in the former, while the latter has a minimal effect. Under bidirectional eccentricity, the weakening of the axial bending performance is most apparent. Bidirectional eccentric loads lead to a reduction in the yield load and initial compression stiffness to approximately 90% of those observed under unidirectional eccentricity. Finally, a field test is carried out to compare the constructability and load-holding performances of bolt-fastened wedge active joints with those of commonly used steel wedge active joints. It is demonstrated that the bolt-fastened wedge active joint effectively maintains prestress through bolt fastening, substantially enhancing the safety of foundation pit excavation construction.
Bearing capacities and failure behaviors of bolt fasten wedge (BFW) active joints used in prestressed internal supports
https://orcid.org/0000-0002-4996-368X
Graphical abstract Display Omitted
Highlights A type of bolt fasten wedge (BFW) active joint is developed. Loading tests are conducted on four full-scale specimens. Load-displacement curves, load–strain curves, moment-rotation curves and failure modes of BFW joints are obtained. The field test is carried out and compared with the commonly used steel wedge active joint.
Abstract In this paper, the bearing capacities and failure behaviors of bolt-fastened wedge active joints used in prestressed internal supports are studied. A thorough exploration of the design of the bolt-fastened wedge active joint is elaborated, and an overview, working mechanism, stiffness analysis, parameters, and strength checking are provided. Then, loading tests are conducted on four full-scale specimens. One test is an axial compression test, while the other three tests are performed to analyze the long-axis (Y-axis) eccentricity, short-axis (X-axis) eccentricity, and biaxial (XY-axis) eccentricity. The load–displacement curve, load–strain curve, bending moment-rotation curve, and failure mode of each specimen are obtained. The experimental results show that the samples have good compressive properties and bending resistance. The impact of the X-axis and Y-axis eccentricities on the compressive ultimate bearing capacity is investigated, revealing a significant reduction in the former, while the latter has a minimal effect. Under bidirectional eccentricity, the weakening of the axial bending performance is most apparent. Bidirectional eccentric loads lead to a reduction in the yield load and initial compression stiffness to approximately 90% of those observed under unidirectional eccentricity. Finally, a field test is carried out to compare the constructability and load-holding performances of bolt-fastened wedge active joints with those of commonly used steel wedge active joints. It is demonstrated that the bolt-fastened wedge active joint effectively maintains prestress through bolt fastening, substantially enhancing the safety of foundation pit excavation construction.
Bearing capacities and failure behaviors of bolt fasten wedge (BFW) active joints used in prestressed internal supports
Zhang, Mingju (author) / Ge, Chenhe (author) / Li, Pengfei (author) / Wan, Weizi (author) / Yang, Meng (author)
2023-09-28
Article (Journal)
Electronic Resource
English
Bearing capacities and modes of failure in single-bolt lap joints
| British Library Online Contents | 2001