Seasonal changes in mesozooplankton community at Northwind Abyssal Plain in the western Arctic Ocean

第4回極域科学シンポジウム横断セッション：[IA] 「急変する北極気候システム及びその全球的な影響の総合的解明」―GRENE北極気候変動研究事業研究成果報告2013―11月12日（火） 国立極地研究所 ２階大会議

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departmental bulletin pape

高強度せん断補強筋を用いた場所打ちRC杭のせん断破壊性状に関する実験的研究

A lot of standards and indicators concerning the design and the calculation of the reinforced concrete construction including AIJ are being published by various organizations. But, there is no one clearly referred about the ultimate shear strength calculation method of the reinforced concrete circular cross section material. In the former report, the flexural failure was made to precede it. The ultimate flexure strength of a reinforced concrete round material was replaced with a rectangular section and it calculated. The result and the rectangular substitution section were obtained and a value close to the experiment value was obtained than the value requested in the square substitution section. In this report, the experiment to make the shear failure precede it is done. The shape of shear reinforcement is changed from the spiral type into the one turn configuration with the former report. And the difference between the failure property and the hysteresis property is clarified. In addition, the adaptability of the evaluation type of calculated ultimate shear yield strength is aimed at

高強度せん断補強筋を用いた場所打ちRC杭の破壊性状に関する実験的研究

The southern Hyogo earthquake occurred in 1995. RC pile is constructed. When up- structure is not carried out yet, it suffers a great deal of damage, the crack arose to RC pile. This example is made into the start, there are many examples which the damage on pile head, and the damage on a pile arose in a subterranean deep position produced. By the view of the present condition which assumed only the inertia power of up structure as external force for a design in case of the earthquake of a pile, these cannot be explained. On the Soft ground which consists of a multi-layer and the ground where the rigidity of a stratum changes, it has turned out that it is so large that the influence of the pile-stress [in case of the earthquake] cannot be disregarded. High-Strength Shear Reinforcement which is used for this time was not used for the conventional pile because it was expensive. In this research, High-Strength Shear Reinforcement is arranged in the shape of spiral. A pitch and axial force are changed and it studies what kind of result is obtained. If a fixed result can be obtained, it will consider earthquake-proof that a intensity structure is made by using it for RC pile from now on