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- 주제어 : 셀구조물 (검색결과 6 건)
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This study examined the effect of wall friction on deformation characteristics of the cellular bulkhead, in terms of artificial wall friction based on the results of model tests according to the existing penetration ratio and loading height. 1. The effect of wall friction on deformation characteristics of the cellular bulkhead turned out to be less as the loading height decreases and the penetration ratio increases. The yield load also becomes less as wall friction decreases. 2. The ratio of the rotational displacement to the horizontal displacement of the cellular bulkhead becomes less as the loading height decreases and the penetration ratio increases. Hence it is concluded that the effect of wall friction has close relationship with the rotational displacement.
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개별요소법를 이용한 셀식 구조물의 거동 해석에 관한 연구
This paper presents analytical approaches on the shear resistance force of the fill materials in the cellular structure. The cellular structure is rather difficult to be applied by the finite element methods due to the fact that it is one of the typical models of discontinuous structure. In order to solve the issue, the shear resistance analysis is performed by introducing the displacement incremental analysis into the distinct element method which would enable to modelize not only continuous, but also discontinuous structures for the static and dynamic area. This method has led to a conclusion in which the computational results are in good agreements with the experimental ones, and moreover, it was confirmed that the effect factors of the shear resistance force were found by analysis. Finally, the paper also provides a suggestion on the experimental equation for the shear resistance force-displacement relation for a purpose of practical design at ease while proposing the equation of the shear resistance moment in the cellular structure using the effect factors.$$a$$a 셀식 구조물은 대표적인 불연속 구조체로서 일반적인 연속체 해석기법의 적용이 난해하여 외각체와 내부채움재의 일체 거동시에 나타나는 전단저항력에 관한 평가기법이 명확하게 확립되어 있지 않다. 본 연구에서는 셀식 구조물의 내부채움재에서 발생하는 전단저항력을 정량적으로 평가하기 위한 전단저항력 해석기법을 제안하고 전단변형실험을 통하여 제안된 해석기법의 적용성에 대하여 검토하였다. 전단저항력 해석기법은 개별요소법을 도입함으로써 연속체에서 불연속체 거동까지의 일련의 과정에 대하여 모형화가 가능하고 이들의 정․동적 해석을 수행할 수 있다. 또한, 내부마찰각과 상재하중을 전단저항력의 주요영향인자로 선정하고 케이스별 해석을 실시하여 이들이 전단저항력에 미치는 영향을 분석하여 셀식 구조물의 내부채움재에 발생하는 전단저항력을 정당하게 평가할 수 있는 전단저항모멘트식을 제안하였다.$$a$$a
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In this study, I researched and analyzed the impact of the thickness of shell and the rigidity of fill materials on the behavior characteristics of cellular bulkhead. The results are as follows. 1. As shells got thicker, yield load tended to increase. But the average increase rate of yield load was slight in case the thickness of shell was 9.3㎜ or over while yield load increased straight in case of below 9.3㎜. 2. As fill materials had more cohesion, yield load tended to increase. There was a little difference in the tendency of the increase by the rigidity of fill materials. Yield load reacted more sensitively to the changes of cohesion in case the rigidity of fill materials is high. 3. As the internal friction angle of fill materials got bigger, yield load increased. There was little difference in the tendency of the increase by the rigidity of fill materials. 4. As the unit weight, the modulus of elasticity and Poisson’s ratio of fill materials increased, yield load increased proportionally. The tendency of the increase was irrelevant to the rigidity of fill materials.
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