Strategic slab-column joint details for improved transmission of HSC column loads

J. H. Lee, J. M. Yang, Y. S. Yoon

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    In typical construction, the slab is made of normal-strength concrete (NSC) and is cast in a continuous fashion through the slab-column joint. For the case of high-strength concrete (HSC) columns, this results in a layer of lower-strength concrete between the upper and lower columns at the floor levels. Since this lower-strength concrete layer can limit the capacity of the column, it is necessary to provide alternative design or construction strategies for the transmission of column loads through slab-column connections. The current paper presents the structural characteristics of slab-column connections by using full-scale tests and non-linear three-dimensional finite-element analyses. Finite-element analyses considering material non-linearity were performed to investigate the axial load plotted against average column strain responses, the type of failure, the principal stress distribution and the reinforcement yielding conditions for various slab-column members. The puddled HSC in the joint, the HSC core, the use of high-strength steel for the column longitudinal reinforcement, and the additional vertical compression reinforcement through the joint were investigated. The alternative reinforcement methods in the slab-column joints significantly improved the performance of the joints - that is, higher axial compressive strength, greater loading stiffness and higher ductility.

    Original languageEnglish
    Pages (from-to)85-91
    Number of pages7
    JournalMagazine of Concrete Research
    Volume60
    Issue number2
    DOIs
    Publication statusPublished - 2008 Mar

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • General Materials Science

    Fingerprint

    Dive into the research topics of 'Strategic slab-column joint details for improved transmission of HSC column loads'. Together they form a unique fingerprint.

    Cite this