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    Thermal Cracking of Mass Concrete Bridge Footings in Coastal Environments

    Source: Journal of Performance of Constructed Facilities:;2015:;Volume ( 029 ):;issue: 006
    Author:
    Christopher P. Bobko
    ,
    Andrew J. Edwards
    ,
    Rudolf Seracino
    ,
    Paul Zia
    DOI: 10.1061/(ASCE)CF.1943-5509.0000664
    Publisher: American Society of Civil Engineers
    Abstract: The North Carolina Department of Transportation (NCDOT) identified several mass concrete footings in coastal bridges with cracking that needed to be assessed in the context of current North Carolina mass concrete specifications. Cracked concrete in coastal environments is of particular concern due to the higher potential for corrosion damage. Site visits were made to assess the extent of the cracking observed in mass concrete footings of three different bridges. A finite-element model was developed and used to analyze the footings and assess them for their early age thermal cracking potential. Finite-element model results showed that reasonably sized mass concrete footings that followed typical NCDOT control plans did not have a high likelihood of significant cracking from thermal stresses. However, a much larger mass concrete footing had a distinctly higher risk of significant cracking even when typical NCDOT control plans are followed. Further, cracking was even more likely when formwork was removed early. The model results correlated well with observations from the field. A comparison with temperature rise results from the Schmidt method, as implemented in the design of the mass concrete structural elements, shows the Schmidt method’s limitations in predicting temperature differences for very large mass concrete footings.
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      Thermal Cracking of Mass Concrete Bridge Footings in Coastal Environments

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4241578
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    • Journal of Performance of Constructed Facilities

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    contributor authorChristopher P. Bobko
    contributor authorAndrew J. Edwards
    contributor authorRudolf Seracino
    contributor authorPaul Zia
    date accessioned2017-12-16T09:20:20Z
    date available2017-12-16T09:20:20Z
    date issued2015
    identifier other%28ASCE%29CF.1943-5509.0000664.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4241578
    description abstractThe North Carolina Department of Transportation (NCDOT) identified several mass concrete footings in coastal bridges with cracking that needed to be assessed in the context of current North Carolina mass concrete specifications. Cracked concrete in coastal environments is of particular concern due to the higher potential for corrosion damage. Site visits were made to assess the extent of the cracking observed in mass concrete footings of three different bridges. A finite-element model was developed and used to analyze the footings and assess them for their early age thermal cracking potential. Finite-element model results showed that reasonably sized mass concrete footings that followed typical NCDOT control plans did not have a high likelihood of significant cracking from thermal stresses. However, a much larger mass concrete footing had a distinctly higher risk of significant cracking even when typical NCDOT control plans are followed. Further, cracking was even more likely when formwork was removed early. The model results correlated well with observations from the field. A comparison with temperature rise results from the Schmidt method, as implemented in the design of the mass concrete structural elements, shows the Schmidt method’s limitations in predicting temperature differences for very large mass concrete footings.
    publisherAmerican Society of Civil Engineers
    titleThermal Cracking of Mass Concrete Bridge Footings in Coastal Environments
    typeJournal Paper
    journal volume29
    journal issue6
    journal titleJournal of Performance of Constructed Facilities
    identifier doi10.1061/(ASCE)CF.1943-5509.0000664
    treeJournal of Performance of Constructed Facilities:;2015:;Volume ( 029 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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