は1978年6月の宮城県沖地震で激しい被害を受けたが, 本高校は日本建築学会による現行の鉄筋コンクリート構造計算規準に基づいて設計された建物としては大被害を受けた最初の建物である。また, 本高校は破壊した鉄筋コンクリート部材を補修し, 更に耐震補強を行って再使用することになった。
本稿では泉高等学校の地震被害の補修方法及び耐震補強の設計内容について報告し, 次に, それらの裏付けとして保有水平耐力と地震力の分担率から地震被害の原因について検討するとともに, 補修・補強後の建物の保有水平耐力を解析し, 耐震性の増強の効果を確認した。

抄録全体を表示

The resistance mechanism of low strength concrete members was influenced by bond slip characteristics of the plain round bars. In this paper, the epoxy resin injection method is proposed to improve the flexural behaviour of those members. The experiments were carried out to clarify the seismic performance of those RC members repaired by the epoxy resin injection method. In the test columns after repair, flexural and shear cracks along the height of the columns were observed similar to the columns with deformed bars. It was confirmed that the maximum strength of the repaired columns agreed with the calculated flexural strength obtained by the present equation.

抄録全体を表示

酵素は特定の分子を認識できるタンパク質であり, 非常に優れた分析試薬でもある。酵素を利用した分析法は広範囲に応用されているが, 臨床検査における血清分析では酵素の利用が最も進展している。酵素を分析試薬としたオートアナライザー, 酵素センサーを搭載したアナライザー, ドライケミストリーを基盤としたアナライザー, および酵素免疫測定(ELISA)用のアナライザーを具体例として, 酵素を利用した分析装置の原理とその応用を述べる。

抄録全体を表示

It was attempted to evaluate the seismic performance of an old medium-rise R/C residential building. The building constructed in 1963 consists of varieties of brittle columns. Collapse tests were conducted for half-scale models of the columns. And based on the test results, the seismic behavior of the building including post-peak regions was studied. The study has revealed that 1) as far as ground motions with maximum velocity of 50cm/s are considered, the amplitude of inter-story drift angle remains as small as 0.7% due to short period and high strength of the building, but 2) if ground motions with maximum velocity of 75cm/s are considered, it increases to 6% due to the severe strength deterioration that the columns undergo.

抄録全体を表示

The seismic behavior of repaired/strengthened RC structures is defficult to analyze theoretically. However, this paper will show that analysis can be effectively done by using the so-called HYLSER (HYbrid Loading System of Earthquake Response) system. Three repairing/strengthening methods were considered: (i) the epoxy resin grouting method; (ii) the reinforcing bars welding method; and (iii) the steel plate covering method. Obtained stiffness deteriorating processes were verified to be almost the same as those of the original ones if adequate repairing methods were performed.

抄録全体を表示