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Strengthening of substandard reinforced concrete beam-column joints by external post-tension rods

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25510%2F16%3A39902147" target="_blank" >RIV/00216275:25510/16:39902147 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1016/j.engstruct.2015.11.004" target="_blank" >http://dx.doi.org/10.1016/j.engstruct.2015.11.004</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.engstruct.2015.11.004" target="_blank" >10.1016/j.engstruct.2015.11.004</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Strengthening of substandard reinforced concrete beam-column joints by external post-tension rods

  • Original language description

    The efficiency of the proposed strengthening method using externally applied post-tension rods in reinforced concrete external beam-column joints, which do not comply with any code requirements, is investigated. Five full-scale specimens were tested in the laboratory. They have specific deficiencies resulting from the lack of shear reinforcement in the joint and poor material properties including low strength concrete and the presence of plain round reinforcement bars. While all specimens were built with column and in plane beam, one of the tested specimens consists of a transverse beam to demonstrate the applicability of the presented retrofit technique. All specimens were subjected to a cyclic quasi-static loading up to 8% drift ratio to observe different levels of structural damage. Two post-tension rods, which were mounted diagonally at each side of the joint, are utilized as a local retrofit technique. The reference specimen displayed a brittle behavior with the concentration of shear cracks mostly in the joint while the rest of the RC components were almost in their elastic range. The ultimate lateral load capacity was increased considerably for all retrofitted specimens. However, a brittle type of failure mechanism was observed such as a joint shear failure or beam-joint failure in the three retrofitted specimens. A relatively ductile response was observed in the specimen with transverse beam, although the axial force in the post-tension rods was the same with the specimens without transverse beam. After testing all specimens, it is found that the lateral force capacities of the beam-column assemblies can be improved up to code requirements by the proposed retrofitting method.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    JM - Structural engineering

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2016

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Engineering Structures

  • ISSN

    0141-0296

  • e-ISSN

  • Volume of the periodical

    107

  • Issue of the periodical within the volume

    15.1.2016

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    14

  • Pages from-to

    9-22

  • UT code for WoS article

    000366775600002

  • EID of the result in the Scopus database

    2-s2.0-84947050925