Flexural and shear performance of prestressed composite slabs with inverted multi-ribs

Sun Jin Han, Jae Hoon Jeong, Hyo Eun Joo, Seung Ho Choi, Seokdong Choi, Kang Su Kim

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Half precast concrete slabs with inverted multi-ribs (Joint Advanced Slab, JAS), which enhance composite performance between slabs by introducing shear keys at connections between the slabs and improve structural performance by placing prestressing tendons and truss-type shear reinforcements, have recently been developed and applied in many construction fields. In this study, flexural and shear tests were performed to verify the structural performance of JAS members. Towards this end, two flexural specimens and four shear specimens were fabricated, and the presence of cast-in-place concrete and the location of the critical section were set as the main test variables. In addition, the flexural and shear performance of the JAS was quantitatively evaluated using a non-linear flexural analysis model and current structural design codes. Evaluation results confirmed that the flexural behavior of the JAS was almost similar to the behavior simulated through the non-linear flexural analysis model, and the shear performance of the JAS can also be estimated appropriately by using the shear strength equations presented in the current design codes. For the JAS with cast-in-place concrete, however, the shear strength estimation results differed significantly depending on the way that the shear contributions of the precast concrete unit and cast-in-place concrete were calculated. Based on the analysis results, this study proposed a design method that can reasonably estimate the shear strength of the composite JAS.

Original languageEnglish
Article number4946
JournalApplied Sciences (Switzerland)
Volume9
Issue number22
DOIs
StatePublished - 1 Nov 2019

Keywords

  • Flexural analysis
  • Inverted multi tee
  • Precast concrete
  • Prestressed concrete
  • Shear strength
  • Structural performance

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