Mesoscopic numerical simulation of effective thermal conductivity of tensile cracked concrete》.pdfVIP

Construction and Building Materials 95 (2015) 467–475 Contents lists available at ScienceDirect Construction and Building Materials journal homepage: /lo cate/conbuildmat Mesoscopic numerical simulation of effective thermal conductivity of tensile cracked concrete Lei Shen a, Qingwen Ren b,⇑, Ning Xia b, Liguo Sun b, Xiaozhou Xia b a Department of Hydraulic Structure Engineering, Hohai University, Nanjing 210098, PR China b Department of Engineering Mechanics, Hohai University, Nanjing 210098, PR China h i g h l i g h t s Tensile cracking behavior of concrete seriously influences thermal conductivity. Develop a method to calculate the conductivity of tensile cracked concrete. Present the relation between thermal conductivity and tension strain of concrete. Discover the mechanism behind the drop of tensile cracked concrete conductivity. Commend a theoretical model to estimate the tensile cracked concrete conductivity. a r t i c l e i n f o a b s t r a c t Article history: The pronounced decrease of effective thermal conductivity (ETC) due to cracking behavior of concrete Received 24 February 2015 will change the temperature profile in concrete structures, indirectly inducing the redistribution of Received in revised form 20 June 2015 thermal stresses. To evaluate this phenomenon, this paper presents a mesoscopic numerical method that Accepted 14 July 2015 is capable of quantitatively evaluating the effect of cracking behavior on concrete ETC. With this method, Available online 25 July 2015