巻号一覧
38 巻 (2000)
- 6 号 p. 342-
- 5 号 p. 262-
- 4 号 p. 198-
- 3 号 p. 124-
- 2 号 p. 68-
- 1 号 p. 4-
前身誌
38 巻, 6 号
選択された号の論文の6件中1～6を表示しています
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吉田 聖一, 冨谷 真, 水谷 陽一, 河野 和間, 関根 和喜, 丸山 裕章2000 年 38 巻 6 号 p. 342-353
発行日: 2000/11/25
公開日: 2010/08/05
ジャーナル フリーThe bottom plate of aboveground oil storage tanks usually bulges, separating from the foundation due to welding deformation. When such bulge is subjected to liquid pressure, it deforms continuously to make contact with the foundation from the edge, and the remaining area of the bulge decreases with increasing liquid pressure. As a result, the deformation is extremely localized and plastic strain occurs at the bulge. In evaluation of the suitability for continued service, permissible bulge is given by API Standard 653. However, there are few studies concerning this bulge. This paper presents plane strain finite element analysis for the localized bottom bulge in aboveground oil storage tanks. Load-incremental, elastic-plastic large deformation analysis is carried out considering contact with the foundation. The relationship of the plastic strain at the bulged bottom plate to the liquid pressure are discussed together with the bulged deformation. After the center of the bulge makes contact with the foundation, the stress and strain do not increase with increasing liquid pressure. In addition, the permissible bulged profile specified by API Standard 653 elastically deforms to make contact with the foundation under low liquid pressure.抄録全体を表示PDF形式でダウンロード (1455K) -
近藤 忠, 八木 健彦2000 年 38 巻 6 号 p. 354-361
発行日: 2000/11/25
公開日: 2010/08/05
ジャーナル フリーLaser heated diamond anvil cell is one of the powerful tools to generate ultra-high pressure and high-temperature simultaneously. Recent progress in laser heating system to realize a stable and homogeneous heating of sample was introduced in this report. Advantage of double-sided heating system, the optical set up of observation and measurement system, and the variable sample configuration were discussed in detail for the practical use of laser heating method. In situ X-ray observation system under high-pressure and high-temperature combined with synchrotron radiation was also presented with examples constructed at KEK-PF and Spring-8.抄録全体を表示PDF形式でダウンロード (5664K) -
吉田 聖一, 座間 信作, 山田 實, 石田 和雄, 田原 隆康2000 年 38 巻 6 号 p. 363-374
発行日: 2000/11/25
公開日: 2010/08/05
ジャーナル フリーA major earthquake occurred in central Taiwan on September 21, 1999. This earthquake was officially named the Chi-Chi earthquake. Many civil engineering structures such as dams, bridges and buildings were seriously damaged by surface faults in the focal region. Oil storage tanks of China Petroleum Corporation (CPC), the largest oil company in Taiwan, also suffered severe damage, although these sites were situated far from the epicenter and the accelerations observed during the earthquake were about 100 gal. The High Pressure Institute of Japan organized a damage survey team in early November to investigate the damage to CPC tanks.
Damage such as buckling of floating roofs, rupturing of shell plates, buckling of shell-to-roof joints, and deformation of equipment in CPC tanks was caused by liquid sloshing. Velocity response spectra estimated from the observed wave heights based on the Fire Service Law of Japan mostly agree with those calculated from the strong motion records near the tank sites. On the other hand, a detail dynamic response analysis of a liquid in a tank subjected to two-dimensional excitations showed that the calculation results do not agree well with the liquid wave heights observed for one tank site but agree for two sites. This means that evaluation of the input ground motion just at the tank site is very important even if the wavelengths is long at long-period range.抄録全体を表示PDF形式でダウンロード (7672K) -
鴻巣 真二2000 年 38 巻 6 号 p. 375-394
発行日: 2000/11/25
公開日: 2010/08/05
ジャーナル フリーSince most plants currently in operation in Japan were built 20-25 years ago, the proportion of deteriorated facilities is extremely high. In many of the facilities operating in severe environments, it is almost inevitable that some damage sustained in their structural materials during the early stages of use will have progressively worsened and that the risk of accidents being triggered by defects that have been previously overlooked is increasing. The term “deterioration” covers a wide range of phenomena which includes material embrittlement, corrosion thinning and cracking.
Deterioration can be defined as a condition under which the initial properties of a material have changed adversely with the passage of time in actual use.
Deterioration is classified in the present paper under three categories: metallurgical deterioration, mechanical deterioration and deterioration due to environmental influences.抄録全体を表示PDF形式でダウンロード (15425K) -
2000 年 38 巻 6 号 p. 397-421
発行日: 2000/11/25
公開日: 2010/08/05
ジャーナル フリーPDF形式でダウンロード (3566K) -
田原 隆康2000 年 38 巻 6 号 p. 430-431
発行日: 2000/11/25
公開日: 2010/08/05
ジャーナル フリーPDF形式でダウンロード (1877K)
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