Shear capacity enhancement of existing underground wall structures using postinstalled reinforcing bars

Kensuke Yamamura, Osamu Kiyomiya

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Existing underground structures constructed prior to the past few decades do not meet the present seismic design code; therefore, these structures do not have sufficient shear strength to withstand large-magnitude earthquakes and shear reinforcement is required. The reinforcement of these structures has not progressed due to the challenges associated with reinforcement methods. Thus, the authors propose a shear reinforcement method using postinstalled reinforcing bars to solve the previously mentioned problems. This method involves the insertion of reinforcing bars with mortar into drilled holes in reinforced concrete walls to achieve a shear bearing capacity similar to that of preinstalled stirrups. To verify the effectiveness of the method, several loading experiments on reinforced concrete specimens using monotonic and cyclic loads were conducted. This method provided a loading capacity that was 80% larger than the capacity provided by the preinstalled stirrups. Furthermore, finite-element analysis studies of the experimental specimens were performed by means of a nonlinear finite-element method not only to reveal the shear bearing mechanism but also to evaluate seismic performance.

    Original languageEnglish
    Article number04013066
    JournalJournal of Structural Engineering (United States)
    Volume140
    Issue number3
    DOIs
    Publication statusPublished - 2014 Mar 1

    Fingerprint

    Reinforcement
    Reinforced concrete
    Bearings (structural)
    Underground structures
    Finite element method
    Cyclic loads
    Seismic design
    Bearing capacity
    Mortar
    Shear strength
    Earthquakes
    Experiments

    Keywords

    • Postinstalled reinforcement bar
    • Seismic effects
    • Shear reinforcement
    • Stirrup
    • Underground structure

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Mechanical Engineering
    • Mechanics of Materials
    • Materials Science(all)

    Cite this

    Shear capacity enhancement of existing underground wall structures using postinstalled reinforcing bars. / Yamamura, Kensuke; Kiyomiya, Osamu.

    In: Journal of Structural Engineering (United States), Vol. 140, No. 3, 04013066, 01.03.2014.

    Research output: Contribution to journalArticle

    @article{6f582f499db641e5b516f2722ea1adb0,
    title = "Shear capacity enhancement of existing underground wall structures using postinstalled reinforcing bars",
    abstract = "Existing underground structures constructed prior to the past few decades do not meet the present seismic design code; therefore, these structures do not have sufficient shear strength to withstand large-magnitude earthquakes and shear reinforcement is required. The reinforcement of these structures has not progressed due to the challenges associated with reinforcement methods. Thus, the authors propose a shear reinforcement method using postinstalled reinforcing bars to solve the previously mentioned problems. This method involves the insertion of reinforcing bars with mortar into drilled holes in reinforced concrete walls to achieve a shear bearing capacity similar to that of preinstalled stirrups. To verify the effectiveness of the method, several loading experiments on reinforced concrete specimens using monotonic and cyclic loads were conducted. This method provided a loading capacity that was 80{\%} larger than the capacity provided by the preinstalled stirrups. Furthermore, finite-element analysis studies of the experimental specimens were performed by means of a nonlinear finite-element method not only to reveal the shear bearing mechanism but also to evaluate seismic performance.",
    keywords = "Postinstalled reinforcement bar, Seismic effects, Shear reinforcement, Stirrup, Underground structure",
    author = "Kensuke Yamamura and Osamu Kiyomiya",
    year = "2014",
    month = "3",
    day = "1",
    doi = "10.1061/(ASCE)ST.1943-541X.0000837",
    language = "English",
    volume = "140",
    journal = "Journal of Structural Engineering (United States)",
    issn = "0733-9445",
    publisher = "American Society of Civil Engineers (ASCE)",
    number = "3",

    }

    TY - JOUR

    T1 - Shear capacity enhancement of existing underground wall structures using postinstalled reinforcing bars

    AU - Yamamura, Kensuke

    AU - Kiyomiya, Osamu

    PY - 2014/3/1

    Y1 - 2014/3/1

    N2 - Existing underground structures constructed prior to the past few decades do not meet the present seismic design code; therefore, these structures do not have sufficient shear strength to withstand large-magnitude earthquakes and shear reinforcement is required. The reinforcement of these structures has not progressed due to the challenges associated with reinforcement methods. Thus, the authors propose a shear reinforcement method using postinstalled reinforcing bars to solve the previously mentioned problems. This method involves the insertion of reinforcing bars with mortar into drilled holes in reinforced concrete walls to achieve a shear bearing capacity similar to that of preinstalled stirrups. To verify the effectiveness of the method, several loading experiments on reinforced concrete specimens using monotonic and cyclic loads were conducted. This method provided a loading capacity that was 80% larger than the capacity provided by the preinstalled stirrups. Furthermore, finite-element analysis studies of the experimental specimens were performed by means of a nonlinear finite-element method not only to reveal the shear bearing mechanism but also to evaluate seismic performance.

    AB - Existing underground structures constructed prior to the past few decades do not meet the present seismic design code; therefore, these structures do not have sufficient shear strength to withstand large-magnitude earthquakes and shear reinforcement is required. The reinforcement of these structures has not progressed due to the challenges associated with reinforcement methods. Thus, the authors propose a shear reinforcement method using postinstalled reinforcing bars to solve the previously mentioned problems. This method involves the insertion of reinforcing bars with mortar into drilled holes in reinforced concrete walls to achieve a shear bearing capacity similar to that of preinstalled stirrups. To verify the effectiveness of the method, several loading experiments on reinforced concrete specimens using monotonic and cyclic loads were conducted. This method provided a loading capacity that was 80% larger than the capacity provided by the preinstalled stirrups. Furthermore, finite-element analysis studies of the experimental specimens were performed by means of a nonlinear finite-element method not only to reveal the shear bearing mechanism but also to evaluate seismic performance.

    KW - Postinstalled reinforcement bar

    KW - Seismic effects

    KW - Shear reinforcement

    KW - Stirrup

    KW - Underground structure

    UR - http://www.scopus.com/inward/record.url?scp=84894462764&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84894462764&partnerID=8YFLogxK

    U2 - 10.1061/(ASCE)ST.1943-541X.0000837

    DO - 10.1061/(ASCE)ST.1943-541X.0000837

    M3 - Article

    AN - SCOPUS:84894462764

    VL - 140

    JO - Journal of Structural Engineering (United States)

    JF - Journal of Structural Engineering (United States)

    SN - 0733-9445

    IS - 3

    M1 - 04013066

    ER -