巻号一覧
13 巻 (1963 - 1965)
- 2 号 p. 29-
- 1 号 p. 1-
13 巻, 2 号
選択された号の論文の4件中1～4を表示しています
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論文
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川越 邦雄1965 年 13 巻 2 号 p. 29-35
発行日: 1965年
公開日: 2013/10/15
ジャーナル フリーTo estimate the fire endurance of building elements, it is important to know the temperature history of them during fire exposure, but it is not so easy to solve this problem because of containing of non-liner elements.
Recently Mr. T. Z. Harmathy presented a numerical method to solve this problem. The author attempted to use an electric computer to solve one by same method assuming that the value of heat conductivity changes with temperature and containing water evaporates without moving to anywhere in the wall.抄録全体を表示PDF形式でダウンロード (445K) -
星野 昌一1965 年 13 巻 2 号 p. 36-41
発行日: 1965年
公開日: 2013/10/15
ジャーナル フリー建築技術の近代化のために軽量で耐火性がすぐれ, 同時に強度, 断熱, 遮音性なども良好なカーテンウオール用スパンドレルを得るための材料, 工法の開発が必要と考えられるが, 建築業協会が建設技術研究補助金をうけて組織した「超高層建築物の計画標準委員会の材料委員会に加わつて研究, 試験したカーテンウオールの耐火性について」の研究成果を検討してここに紹介する。抄録全体を表示PDF形式でダウンロード (417K) -
相馬 重信, 八幡 泰男1965 年 13 巻 2 号 p. 42-48
発行日: 1965年
公開日: 2013/10/15
ジャーナル フリーThe purpose of this experiments was to determine on the decrease of electric resistance of a vinyl cord covering through heating.
As material a vinyl flat cord covering on the market and poly vinyl chloride were used. These materials were heated in the flame of alcohol-lamp or the electric furnace under 100°C～900°C. The measurement of electric resistance and chemical analysis of these calcined products were tested.
The results obtained were as follows,
(1) Hydrogen chloride from calcined poly vinyl chloride in a vinyl cord covering remained as hydrochloric acid and formed calcium chloride in a vinyl cord covering.
(2) The electric resistance of calcined vinyl cord covering decreased less than that of calcined products from poly vinyl chloride for the presence of these hygroscopic products.抄録全体を表示PDF形式でダウンロード (572K) -
横井 鎮男1965 年 13 巻 2 号 p. 49-55
発行日: 1965年
公開日: 2013/10/15
ジャーナル フリーThe experimental studies in thermal convection from a line burner was already performed by A. O. Rankine and some discussions about the results were made by Dr. P. H. Thomas, This is a very difficult problem to solve exactly, but so far as the approximate solution is concerned, Rankine’s similarity theory and Thomas’ dimensional analysis are very excellent and useful.
Now, the similar results in the case of a rectangular heat source are wanted. The author has first begun the similar experiment on a line heat source of high temperature, made by burning alcohol and attempted to compare the results with Rankine’s low temperature case. The experiment was performed in a brief wind tunnel. Alcohol was burned in the vessel 85cm. long and 1cm. wide. This vessel was placed in the wind tunnel, orienting its longer side perpendicular to the wind direction.
The results are summarized as follows :
(1) The total heat quantity contained in the flow, is estimated to be 70～80% of the heat produced by the combustion of alcohol. But this contained heat is lost gradually through the floor and the wall of the tunnel. At the point 100cm. downwind of the source, the heat quantity contained in the flow is estimated to be 40～50% of the initial heat quantity.
(2) The measured vertical temperature distribution (x≧20cm.) in the flow is fitted better to the curve represented in φΩ1/4 and (z/x)Ω3/4 coordinates than to the one represented in φΩ-0.14 and (z/x)Ω3/4 coordinates.
(3) The wake is performed behind vessel of alcohol and so in the region very near to the heat source, the heat is diffused distorting to the downward. In this region, the temperature distribution approaches to the one from a plain heat source rather than from a line heat source.
(4) The above mentioned results are obtained on the assumption that the local wind velocity in the tunnel and the density of the hot gas does not vary from the unheated condition. This is not strictly correct and the author admits that the results obtained are the only approximate solution.抄録全体を表示PDF形式でダウンロード (615K)
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