Abstract
To study the seismic performance of embedded polyvinyl chloride (PVC) pipe confined reinforced high-strength concrete (PVC-RHC) columns, five specimens are designed for cyclic loading test, which include three PVC-RHC column specimens, an embedded circle steel tube confined reinforced high-strength concrete (CST-RHC) column specimen, and a reinforced high-strength concrete (RHC) column specimen. The failure mechanism and morphology are revealed by experiments. The influences of PVC pipe diameter, axial compression ratio, and concrete strength on seismic performance indexes are analyzed. The research results indicate thhe following: all specimens displayed shear baroclinic failure. Compared with RHC specimens, the hysteretic curves of the PVC-RHC specimen and CST-RHC specimen were fuller; furthermore, their energy dissipation capacity, deformation, and ductility were more beneficial. With the increase of the diameter–length ratio and axial pressure, the energy dissipation capacity and deformation capacity of PVC-RHC specimens decreased. The shear bearing capacity of the PVC-RHC specimen calculated with “concrete structure design code” (GB 50010-2010) was smaller than the test results by 25%, showing an excessive safety margin. Thus, according to the failure mechanism of the PVC-RHC specimen, a new calculation formula of shear bearing capacity is deduced, which is in good agreement with the experimental results.
Highlights
IntroductionOwing to the advantages of high strength, little deformation, and good durability, reinforced high-strength concrete (RHC) is widely used in long-span, heavy-duty, and high-rise buildings [1,2,3]
Owing to the advantages of high strength, little deformation, and good durability, reinforced high-strength concrete (RHC) is widely used in long-span, heavy-duty, and high-rise buildings [1,2,3].with the increase of concrete strength, the frangibility increases and plastic deformation ability decreases
The volume–stirrup ratio is improved in order to increase the deformation capacity of RHC, which leads to the construction difficulties, the increased use of steel and high cost of projects [4,5]
Summary
Owing to the advantages of high strength, little deformation, and good durability, reinforced high-strength concrete (RHC) is widely used in long-span, heavy-duty, and high-rise buildings [1,2,3]. Materials 2020, 13, 737 column, C.E.Kurt found that the PVC plastic pipe improved the mechanical properties of core concrete by providing a constraining force [8]. Other researchers [11,12,13,14,15,16] found that PVC pipe confined concrete mostly appears plastically damaged, which improves the bearing capacity, seismic deformation, and durability of specimens with less cost, energy saving, and environmental protection. Patel VI [17] performed a parametric analysis of fiber-based models to examine the effects of local buckling, bending axis, aspect ratio, and material strength on uniaxial compression RCFST (Round-ended concrete-filled steel tubular) short beam-columns’ performance. It is expected to provide new technical support for the further promotion and application of high-strength concrete
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
