RANSACTIONS OF THE JAPANESE SOCIETY OF IRRIGATION, DRAINAGE AND RECLAMATION ENGINEERING, Volume 183, Page 167-174 (1996)

Influence of Size and Form of Concrete Structure on Inner Temperature Variation

Hidehiko OGATA*, Masato KUNITAKE**, Hiroshi YAMASHITA***, Fumiyoshi KONDO** and Takao NAKAZAWA****

* The United Graduate School of Agricultural Sciences, Kagoshima University
and Research Fellow of the Japan Society for the Promotion of Science
** Faculty of Agriculture, Miyazaki University
*** Department of Agriculture, Miyazaki Prefecture
**** Faculty of Engineering, Miyazaki University

Abstract

　Recently, importance of temperature cracking control on small concrete structures is increasing. Temperature cracking is complicatedly and compositely influenced by construction size and form, mix proportion of concrete, execution of work, curing method and environmental conditions. Therefore, small concrete structure are examined by means of simplified investigation because of the difficulties of all-round investigation about temperature cracking.
　The inner temperature variation of concrete structure is assumed to be influenced by construction size and form. This paper described how the difference of construction size and form influence the inner temperature variation using three types concrete specimen and the assumed small concrete structures.
　As a result, the concrete structure size influenced the time courses of temperature by the results of concrete temperature measurment with thermocouple sensor in the three specimens. Also, the concrete structure size and form influenced the time courses of temperature by the results of simulation about some assumed small concrete structures using the 3-D FEM. Furthermore, calculated temperature was found to be smaller than measured one with increasing concrete structure size. This cause would be attributed to the difference of the characteristic adiabatic temperature rise curve.