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    Stress Intensity Factors for Cracked Steel Girders Strengthened with CFRP Sheets

    Source: Journal of Composites for Construction:;2015:;Volume ( 019 ):;issue: 005
    Author:
    Amer Hmidan
    ,
    Yail J. Kim
    ,
    Siamak Yazdani
    DOI: 10.1061/(ASCE)CC.1943-5614.0000552
    Publisher: American Society of Civil Engineers
    Abstract: This paper presents the fracture characteristics of cracked wide-flange steel girders (W18–W40, W460–W1000 in metric) strengthened with carbon fiber-reinforced polymer (CFRP) sheets. A broad range of parameters are considered to study their effects on the crack-tip stress intensity of the girders: flange-to-web area ratios, crack depth-to-height ratios, CFRP-to-steel area ratios, CFRP-to-steel modular ratios, and CFRP-bond widths. A three-dimensional finite-element approach is proposed and validated with a previously conducted experimental program. A total of 1,240 models, i.e., 40 unstrengthened and 1,200 strengthened girders, are used to evaluate the crack-tip behavior of the W-shape girders. The response surface-regression analysis procedures (RSREGs) are used to develop correction factors for the stress intensity of the girders. Stochastic simulations are conducted to probabilistically understand the vulnerability of the cracked girders and evaluate the efficacy of CFRP strengthening in terms of reducing stress intensity.
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      Stress Intensity Factors for Cracked Steel Girders Strengthened with CFRP Sheets

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    contributor authorAmer Hmidan
    contributor authorYail J. Kim
    contributor authorSiamak Yazdani
    date accessioned2017-05-08T22:27:15Z
    date available2017-05-08T22:27:15Z
    date copyrightOctober 2015
    date issued2015
    identifier other45527289.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/80873
    description abstractThis paper presents the fracture characteristics of cracked wide-flange steel girders (W18–W40, W460–W1000 in metric) strengthened with carbon fiber-reinforced polymer (CFRP) sheets. A broad range of parameters are considered to study their effects on the crack-tip stress intensity of the girders: flange-to-web area ratios, crack depth-to-height ratios, CFRP-to-steel area ratios, CFRP-to-steel modular ratios, and CFRP-bond widths. A three-dimensional finite-element approach is proposed and validated with a previously conducted experimental program. A total of 1,240 models, i.e., 40 unstrengthened and 1,200 strengthened girders, are used to evaluate the crack-tip behavior of the W-shape girders. The response surface-regression analysis procedures (RSREGs) are used to develop correction factors for the stress intensity of the girders. Stochastic simulations are conducted to probabilistically understand the vulnerability of the cracked girders and evaluate the efficacy of CFRP strengthening in terms of reducing stress intensity.
    publisherAmerican Society of Civil Engineers
    titleStress Intensity Factors for Cracked Steel Girders Strengthened with CFRP Sheets
    typeJournal Paper
    journal volume19
    journal issue5
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0000552
    treeJournal of Composites for Construction:;2015:;Volume ( 019 ):;issue: 005
    contenttypeFulltext
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