ANALYSIS METHOD FOR CAUSE OF STRAIN OF CONFINED BODY IN CONFINED CONCRETE

PROBLEM TO BE SOLVED: To provide an analysis method for the cause of strain of a confined body in which the cause of strain of the confined body in relation to multiple factors of a volume change of the concrete is analyzed in confined concrete confined by a confined body (e.g., a reinforcing bar),...

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Bibliographic Details
Main Authors MITANI YUJI, TANIMURA MITSURU
Format Patent
LanguageEnglish
Japanese
Published 05.10.2015
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Summary:PROBLEM TO BE SOLVED: To provide an analysis method for the cause of strain of a confined body in which the cause of strain of the confined body in relation to multiple factors of a volume change of the concrete is analyzed in confined concrete confined by a confined body (e.g., a reinforcing bar), and thereby the measure to the main factor in these multiple factors is taken and is available in effective prevention of the cracking of the concrete.SOLUTION: An analysis method comprises: a step of obtaining a value of each strain of a confined body of unconfined concrete and confined concrete; a step of calculating constants K and A in an equation s=K( c-αs T)+A by using these values, (in the equation, s is a value of the strain of the confined body of the confined concrete, c is a value of the strain of the unconfined concrete, αs is a thermal expansion coefficient of the confined body, and T is a variation amount of the temperature of the concrete); and a step of analyzing the cause of the strain of the confined body of the confined concrete in relation to the factor bringing about a volumetric change of the concrete by using the thermal expansion coefficient of the equation and the concrete. 【課題】拘束体(例えば鉄筋)によって拘束された拘束コンクリートにおいて、拘束体のひずみの原因を、コンクリートの体積変化の複数の要因との関係で分析することによって、これら複数の要因の中の主要な要因に対して対策を講じて、コンクリートのひび割れの効率的な防止に利用できる、拘束体のひずみの原因の分析方法を提供する。【解決手段】無拘束コンクリート、及び拘束コンクリートの拘束体の各ひずみの値を得る工程と、これらの値を用いて、式: s=K( c−αs T)+A(式中、 sは拘束コンクリートの拘束体のひずみの値、 cは無拘束コンクリートのひずみの値、αsは拘束体の熱膨張係数、 Tはコンクリートの温度の変化量である。)における定数KおよびAを算出する工程と、前記式とコンクリートの熱膨張係数を用いて、拘束コンクリートの拘束体のひずみの原因を、コンクリートの体積変化を引き起こす要因との関係で分析する工程を含む。【選択図】図1
Bibliography:Application Number: JP20140054241