北大工学部A棟の温度伸縮計測結果 : 鉄筋コンクリート建物の温度応力に関する研究(その1)

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  • MEASURMENT OF THERMAL EXPANSION AND CONTRACTION OF A-WING OF THE FACULTY OF ENGINEERING HOKKAIDO UNIVERSITY : A study on thermal stresses of reinforced concrete buildings (Part 1)
  • 鉄筋コンクリート建物の温度応力に関する研究-1-北大工学部A棟の温度伸縮計測結果
  • テッキン コンクリート タテモノ ノ オンド オウリョク ニ カンスル ケンキ

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The purpose of this paper is to investigate the thermal expansion and contraction caused by the ambient temperature changes of an existing reinforced concrete building. According to the past literature, thermal expansion and contraction of a building corresponds to the joint width changes at the expansion joint. Thus, thermal expansion and contraction were measured with a slide caliper at the expansion joint twice a day over a period from April 9, 1984 to January 24, 1986. The conclusions are as follows : 1) Thermal expansion and contraction at. the top story was shown to be correlated with the atomosoheric temperature, while other stories showed a correlation with the room temperature. 2) Room heating prevents thermal contraction and decreases thermal stresses in the case where the building is warmed uniformly such as in this building. 3) The relation between temperature and thermal expansion and contraction describes a definite loop in a one year cycle. This was verified. 4) The maximum value of thermal expansion and contraction of the building is measured at the top story. Thermal expansion and contraction for one day is occasionally equal to 1/3 of the value of an year.

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