• Title/Summary/Keyword: Uplifting

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Performance-based framework for soil-structure systems using simplified rocking foundation models

  • Smith-Pardo, J. Paul
    • Structural Engineering and Mechanics
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    • v.40 no.6
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    • pp.763-782
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    • 2011
  • Results from nonlinear time-history analyses of wall-frame structural models indicate that the condition of vulnerable foundations -for which uplifting and reaching the bearing capacity of the supporting soil can occur before yielding at the base of the shear walls- may not be necessarily detrimental to the drift response of buildings under strong ground motions. Analyses also show that a soil-foundation system can inherently have deformation capacity well in excess of the demand and thus act as a source of energy dissipation that protects the structural integrity of the shear walls.

Case Study on the Characteristics of Vertical Bearing Capacity for Steel Pipe Pile Installed by PRD (PRD 강환 말뚝의 연직지지력 특성에 관한 사례 연구)

  • 최용규;정창규;정성기;김동철;정태만
    • Proceedings of the Korean Geotechical Society Conference
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    • 1999.03a
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    • pp.225-232
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    • 1999
  • Construction case of PRD (Percussion Rotary Drill) pipe pile and matters to be attended in construction of PRD pile were reviewed. The compressive and uplifting static pile load tests for PRD piles were performed and, also, analysis by Pile Driving Analyzer was done. Based on these results, bearing components in each resisting part (that is: steel toe, external skin, and internal skin) were measured separately. The measured resisting force was compared to the value calculated by the estimated formula. The pile capacity was mobilized in steel toe area and the external skin friction and the internal friction were not produced. Thus, it could be considered that toe of PRD pile should be supported in hard bearing stratum (for example, the fresh soft rock).

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Reinforcement of RC Structures with External Post-Tensioning Method (외부 포스트텐셔닝공법에 의한 콘크리트 구조물의 보강사례 연구)

  • 정원용;김승익
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.05a
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    • pp.387-392
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    • 2002
  • In many years, post-tensioning method has been used for structural reinforcement of RC structures due to easy installation and good quality control. This study presents practical application results for the effectiveness of structural post-tensioning reinforcement of the FCM bridge girders, cement silos and building girders. For the FCM bridges deflected excessively at the end of girders, for cement silos cracked vertically at silo surface and for building girders deflected due to heavy load from roof, the external post-tensioning method was used for uplifting deflected girders and closing cracks with increasing resisting capacity of the structures. It was demonstrated that all the items were rehabilitated nearly to the initial construction status according to the field test results.

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CASE REPORTS ON THE MAGNETIC RETAINED OVERDENTURES (자석 유지장치를 이용한 Overdenture 수복에 관한 임상적 연구)

  • Vang Mong-Sook;Choi Chang-Hwan;Kim Young-Yi
    • The Journal of Korean Academy of Prosthodontics
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    • v.40 no.1
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    • pp.88-97
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    • 2002
  • The purpose of this study was to evaluate a cases which was treated with magnetic attachments on the patients in edentulous mandible and maxilla. Author made magnetic overdenture for two patients and then clinical examination were used for evaluation of the function and change in retention during 30months. Patients showed difficulty in oral hygiene care at the beginning but they go used to it soon. It was effective in promotion of denture retention and stability and also gave patient emotionally uplifting psychologic state. This study suggest that magnetic attachment was effective for the treatment of patients presenting a few remaining teeth or teeth under severe caries or mobility.

The Bridge Deck Restrainer of Rubber-Chain Type (블록형 고무피복체인식 낙교방지장치)

  • 최석정;강재윤;오태헌;유문식;윤석용
    • Proceedings of the Korea Concrete Institute Conference
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    • 2000.10a
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    • pp.777-784
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    • 2000
  • During past earthquakes several bridges have failed due to a loss of support at their bearings, seats, and/or expansion joints. Most efforts to prevent this have been directed toward tying bridges together at their bearings and expansion joints. Longitudinal restrainers are installed to limit the relative displacement at joints and thus decrease the chance of a loss of support as these locations. Transverse restrainers are necessary in many cases to keep the superstructure from sliding off in the transverse direction. Vertical restrainers are used at bearings to prevent uplifting deck, but usually not economically justified unless additional bearing retrofit is being performed. To obtain this three function of restrainer, a universal restrainer is developed. The load capacities were evaluated in static and dynamic experimental test. The test results show that the measured capacity or strength of the bridge deck restrainer is similar to that of design value.

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Edge Compensation Algorithm by Extracting the Skeletons from the Uplifted Image (융기된 영상의 골격선 추출에 의한 에지 보정 알고리듬)

  • Park, Mi-Jin;Yang, Yeong-Il;Park, Jung-Jo
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.38 no.6
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    • pp.675-683
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    • 2001
  • In this paper, we propose the edge compensation algorithm which connects the adjacent edges without losing the information of the skeletons on the edge image. The proposed edge compensation algorithm is composed of succeeding two steps. In the first step, the uplifted image is obtained by uplifting the edge image repeatedly. The next step is to extract the edge image from the uplifted image using the skeleton extraction algorithm. Experimental results show that the proposed method connects the adjacent edges without the distortion of the original edge information compared to the traditional method.

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Way of Trust Restoration through Uplifting Police Integrity (경찰공무원 청렴성제고를 통한 신뢰도 회복방안)

  • Lee, Hyo-Min
    • Proceedings of the Korea Contents Association Conference
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    • 2014.11a
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    • pp.247-248
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    • 2014
  • 국제투명성 기구가 발표한 우리나라 부패인식 지수는 2008년을 기점으로 매년 하락하는 추세를 보이고 있으며, 지난 2013년 55점(세계 46위, OECD 34개국 중 27위)를 나타내고 있다. 현대사회에서 공직자의 부패문제는 과거부터 꾸준히 제기되어온 해결과제라고 할 수 있으며, 최근 몇 년간의 문제만은 아니라는 것을 의미한다. 다산 정약용의 저서 "목민심서" 율기육조 중에서 제2조 청심에서 청렴은 수령의 기본임무이고, 모든 선의 근원이요 모든 덕의 근본이니, 청렴하지 않고서 수령 노릇을 할 수 있는 자는 없다고 하였다. 이는 공직사회의 청렴성을 중요시 하는 것으로 현대사회를 살아가는 공직자에게 귀감이 된다고 할 수 있을 것이다. 그러나 최근 경찰공무원의 청렴성이 대중매체의 도마에 끊임없이 회자되며, 이는 경찰조직구성원 전체에 대한 신뢰를 저하시키는 요인으로 작용되고 있다. 따라서 본 연구에서는 경찰부패와 청렴도 제고에 관련되는 선행연구를 검토하고, 경찰조직의 내 외적 환경에서의 청렴도 제고를 저해하고 있는 문제점을 도출하여, 이에 관한 개선방안을 제시하도록 하였다.

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Three-Dimensional Seismic Analysis for Spent Fuel Storage Rack

  • Lee, Gyu-Mahn;Kim, Kang-Soo;Park, Keun-Bae;Park, Jong-Kyun
    • Nuclear Engineering and Technology
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    • v.30 no.2
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    • pp.91-98
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    • 1998
  • Time history analysis is usually performed to characterize the nonlinear seismic behavior of a spent fuel storage rack(SFSR). In the past, the seismic analyses of the SFSR were performed with two-dimensional planar models, which could not account for torsional response and simultaneous multi-directional seismic input In this study, three-dimensional seismic analysis methodology is developed for the single SFSR using the ANSYS code. The 3D- Model can be used to determine the nonlinear behavior of the rack, i.e., sliding, uplifting, and impact evaluation between the fuel assembly and rack, and rack and the pool wall, This paper also reviews the 3-D modeling of the SFSR and the adequacy of the ANSYS for the seismic analysis. AS a result of the adquacy study, the method of ANSYS transient analysis with acceleration time history is suitable for the seismic analysis of highly nonlinear structure such as an SFSR but it isn't appropriate to use displacement time history of seismic input.

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Type of Wearing Brassiere in Elderly Women Using Q Methodology (Q방법론을 적용한 노년 여성의 브래지어 착용에 대한 인식 유형 연구)

  • Cha, Su Joung
    • Journal of the Korean Society of Clothing and Textiles
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    • v.44 no.5
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    • pp.893-905
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    • 2020
  • This study analyzed the perception types of women over the age of 60 in regards to attitude and the effect of wearing brassiere. In addition, it was also to provide the basic data demand for the development of a brassiere for elderly women. Q methodology was used for this study. Analyze the data using the QUANL pc program. Type 1 was the nipple cover non-preferred type. Type 1 thought brassiere has uplifting effect, but is uncomfortable and only worn when going out. Type 2 was a function-oriented preference type. They wore a brassiere for beauty and psychological satisfaction. The brassiere push-up the breast and enhanced volume. Type 3 was the pursuit of vibration reducing and beauty type. The brassiere reduced breast vibration and kept armpits comfortable. The brassiere was worn for beauty. In the future, the actual development of brassieres for elderly women should be investigated for wearing sensation and satisfaction.

"Homeward returning": A Plebeian Romance and Naturalization of Vagrancy in John Milton's Paradise Lost

  • Cho, Hyunyoung
    • Journal of English Language & Literature
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    • v.64 no.1
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    • pp.135-150
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    • 2018
  • Focusing on the hermeneutic instability of a key word of Paradise Lost, "wander," this study attempts to situate John Milton's early modern epic in the longue $dur{\acute{e}}e$ historical transition from seignorial to capitalist mode of production, especially the displacement and reorganization of producer population, a corollary of early phase of modernization. The historic experience of vagrancy and its normalization, and the concomitant shift of the primary human sociability from given to voluntary bonds, I suggest, shape and inform Milton's early modern rewriting of the Biblical story of the fall and his revising of the heroic epic romance into a plebeian romance of a wandering, companionate couple. While building on the critical consensus on this poem's deliberate distancing from the tradition of classical epic and chivalric romance, this essay argues that Milton re-appropriates and re-channels the aspirational aspect of chivalric wandering, or mobility, for his plebeian heroes, a companionate conjugal couple. The hermeneutic instability of the word wander, this essay suggests, captures the duality of the historic experience of vagrancy, both the tragic experience of displacement and the liberational and uplifting dimension of that experience.