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Abstract:
To reveal the force transmission mechanism of a novel steel-concrete joint in the large-span hybrid continuous girder bridgesa large-scale model of a steel-concrete joint with a geometric scaling ratio of 13.5 was designed and fabricated based on the Fuzhou Mawei Bridge. And a refined solid finite element method was also used for static loading analysis under different design load combinations. The results show thatunder the load-bearing capacity limit state conditionthe concrete girder section of the joint model was fully compressed. The maximum compressive stress of the top-plate concrete at the joint surface was -23.6 MPawhile the maximum tensile stress of the bottom-plate steel was 115.8 MPa. These values were much smaller than the design value of material strength. When under 1.4 times the load-bearing capacity limit state conditionthe test model of the steel-concrete joint exhibited no marked damage during the static loading process. The load-displacement/strain curves of measuring points on each control section basically showed a linear relationshipand the structure was always in an elastic working stateindicating that the joint had sufficient safety reserves. The vertical deformation of each section of the steel-concrete joint had no sudden change along the longitudinal directionindicating that the force transmission of the joint was smoothwhich can ensure that the rigidity of the main girder was steadily transitioned from the concrete to the steel box girder section. The relevant research findings can provide a reference for the design and construction of such hybrid continuous girder bridges in the future. © 2023 Hunan University. All rights reserved.
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Journal of Hunan University Natural Sciences
ISSN: 1674-2974
Year: 2023
Issue: 7
Volume: 50
Page: 44-56
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WoS CC Cited Count: 0
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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