TEI1PERATIJRE Japan Peng Engineering Department, Miura Boiler co., Ontario, Canada paper descri~s development of thermal cracks in a idealized annual change of the concrete. Crack occurs """r'1"P1"P along the stream surfuoo due to the.severe -·~6·~·- n't'Or1l """1" descending process of…
TEI1PERATIJRE Japan Peng Engineering Department, Miura Boiler co., Ontario, Canada paper descri~s development of thermal cracks in a idealized annual change of the concrete. Crack occurs """r'1"P1"P along the stream surfuoo due to the.severe -·~6·~·- n't'Or1l """1" descending process of temperature. Crack is assumed to ..... "" .,., .. '"',.,, of finite elements so that a particular rerqeshing teclmique is not surf.are temperature gets near lowest Link element is the becomes na'M'f''!.'lilll=>t°Tn<!ll11"1l place cracking and vru:iations.of stress H"lt'""",,C'rt'I.' of the annual temperature change are discussed. Cracking, load, heat conduction, stress 1t''ltPt1C!rtt1 of causes can be mentioned for occurrence concrete structures such asthe gravity dam. is thermal C'l"n"ll·nv 01""' due to the radiation and dtlfusion of the cement hydration heat. The other is the difference of volume changes in a concrete layer near surface according to the thennal gradient caused by the seasonal environmental temperature change. Higashigawa et (1992) and Noik:e et al. (1994) analyzed thermal stresses in a gravity dam to predict the thennal cracks due to the latter cause. Okubo et al. (1989) analyzed the thennal cracks in massive concrete layers due to the former cause. Using the interfuce element which yields in tensile region, they met with success to investigate generating, opening, and closing of the crack.