• Title/Summary/Keyword: 'Form'

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A basic study for development of SMART form for beams (SMART 보 거푸집 개발 기초연구)

  • Kim, Gyeongju;Lim, Chaeyeon;Kim, Sunkuk
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.11a
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    • pp.203-204
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    • 2014
  • Unlike other members, beams have various cross-sections and they have an important role of delivering the load of slabs. A beam form neighbors the columns and slabs, which makes it difficult to be installed. In a conventional way to exclusively use the form after concrete pouring, the form and a support should be both removed. Then, the support should reinstalled to sustain the stripping time of form, resulting in a structural issue. To solve such structural problem, the study proposes SMART beam form that uses filler panels and supports for filler. The floor filler panels and supports for filler are not removed after concrete curing, to conform to the stripping time of supports. Thus, any structural problem such as cracks and reduction of compressive strength owing to the gap of load bearing capacity can be prevented. The study results will be used as cases for studies on productivity analyses.

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Work Time of Basement Composite Wall Form Assembly by Work Time Analysis (작업분석을 통한 합벽거푸집 구성 요소별 작업소요시간에 관한 연구)

  • Heo, Kyoung-Moo;Kim, Myoung-Hyun;Kim, Tae-Hui;Kim, Jae-Yeob;Kim, Gwang-Hee
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.11a
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    • pp.9-13
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    • 2009
  • Recently, construction in downtown is often done closely at the adjacent building. In this case, underground construction need to Basement Composite Wall(BCW) construction. However, generally, during the construction process of BCW form works have many problems that are narrow working space and inefficient time consuming. Despite of these problems, there was no quantitative research for the work time of BCM assembly. Therefore, in this study, work time of CBW form assembly in underground construction is identified by the work analysis. The results of this study reveal that buttress work of basement form take lots of time in the entire work process of Basement Composite Wall form assembly.

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A Study on the Characteristics of wave Resistance and Hull Form obtained at Finte Water Depth (유한수심(有限水深)에서의 선형계획(線型計劃))

  • Hyo-Chul,Kim;J.C.,Seo
    • Bulletin of the Society of Naval Architects of Korea
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    • v.17 no.1
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    • pp.19-24
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    • 1980
  • From the singularity distribution which obtained by minimum wave resistance condition, optimum hull form is obtained by stream line trancing method as Inui and Pien did. Thus obtained hull form has a extruded bottom along a keel line. Therefore the hull form must be modified to have flat bottom. This modification process is conducted by putting a fictitious bottom. It is found out that the wave resistance does not significantly alter at design speed even though the hull form has remarkably changed at the bottom. Therefore flattening the bottom by the effect of depth may be more rational for practical hull form design than ordinary manual hull-form modification.

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Comparison of Prescription Regarding Form Work in Standard Specifications among Domestic and Foreign Countries (국내외 표준 시방서의 거푸집 및 동바리 시공.해체 관련 규정의 비교)

  • Jeon, Kyu-Nam;Choi, Sung-Yong;Noh, Sang-Kyun;Back, Dae-Hyun;Han, Min-Cheol;Han, Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.05b
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    • pp.195-198
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    • 2009
  • In this paper, regulation for form work in standard specification among Korea and foreign countries are studied and compared. Within the scope of this paper, regulation regarding fabrication of form and form removal are mainly focused on. Standard specification prescribed by construction temporary equipment association provides detailed regulations and well arranged. ACI 347-04, CEB-FIP and BS EN 13670 had different style and scope compared to domestic specification. Especially, regulation for form removal in ACI prescribed in terms of minimum period.

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An Basic Study on the Lateral Pressure to the Form for Rammed Earth Method (흙다짐공법에서 거푸집측압에 대한 기초적연구)

  • Lee, Jung Je;Kwak, Yoon Keun;Hwang, Hey Zoo;Lee, Jong Kook
    • KIEAE Journal
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    • v.9 no.1
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    • pp.39-45
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    • 2009
  • The lateral pressure that functions on the form of the rammed earth method occupies an important part in the construction of the form. The following research constructed testing forms of $800mm{\times}1200mm$, that have the wall thickness of 200mm, 300mm, 400mm and 500mm to measure the lateral pressures according to the wall thicknesses. Research showed that compared to the concrete construction lateral pressures, the form results measured 2.3-8.9 times higher, and rather than thickness of the form, the distance between the rammer and mold and assuring time had direct relation to the lateral pressure of the form.

The Design of Variable Structure Controller for the System in Phase Canonical Form with Incomplete State Measurements (비 측정 상태변수를 갖는 위상 표준형계통에 대한 가변구조 제어기의 설계)

  • 박귀태;최중경
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.41 no.8
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    • pp.902-913
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    • 1992
  • There have been several control schemes for the single input systems with unmeasurable state variables using variable structure control(VSC) theory. In the previous VSC, the systems must be represented in phase canonical form and the complete measurements for each state variable must be assumed. In order to eliminate these restrictions several VSC methods were proposed. And especially for the systems in phase canonical form with unmeasurable state variables, the reduced order switching function algorithm was proposed. But this method has many drawbacks and can not be used in the case of general form (not phase canonical form) dynamic system. Therefore this paper propose new construction method of switching fuction for the systems in phase canonical form, which reduce the restriction of reduced order switching function algorithm. And this algorithm can be realized for any state representation and adopted in the systems where not all states are available for switching function synthesis or control.

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FORE: A Form-Driven Object-Oriented Reverse Engineering Methodology (업무 양식에 근거한 객체 지향 역공학 방법론)

  • Yoo, Cheon-Soo;Lee, Hee-Seok
    • Asia pacific journal of information systems
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    • v.9 no.1
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    • pp.115-142
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    • 1999
  • Legacy applications are valuable assets that should be integrated into next generation business systems. To gain this advantage, progressive companies can reverse engineer the legacy business operations. This paper presents a form-driven object-oriented reverse engineering(FORE) methodology by the use of business forms to recover semantics of legacy applications. They retain the user-oriented contents of business and thus are easily understandable. Our form driven object-oriented reverse engineering methodology consists of five phases: form and usage analysis, form object slicing, object structure modeling, scenario design, and model integration. Knowledge about form structure and user interaction with legacy applications is used to capture the design semantics. An object model, which consists of an object structure model and scenario results from such form knowledge. The resulting object model is more likely to help reverse engineers understand and reuse legacy systems.

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Effect of Crystal Form on in Vivo Topical Anti-Inflammatory Activity of Corticosteroids

  • Sohn, Young-Taek;Kim, Sun-Young
    • Archives of Pharmacal Research
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    • v.25 no.4
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    • pp.556-559
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    • 2002
  • The aim of this study was to gain information on the effects of the crystal form of corticosteroids on the topical anti-inflammatory activity. Two different crystal forms, Form A and Form B, of the drugs of prednicarbate, hydrocortisone, betamethasone 17-valerate, prednisolone, and methyl prednisolone were prepared and their topical anti-inflammatory activities were measured using arachidonic acid induced ear edema assay in mice. Two crystal forms of the drugs showed differences in anti-inflammatory activity. Among the drugs examined, Form B of prednicarbate and betamethasone 17-valerate showed significantly more potent anti-inflammatory activities as compared to their Form A.

ON LIGHTLIKE HYPERSURFACES OF COSYMPLECTIC SPACE FORM

  • Ejaz Sabir Lone;Pankaj Pandey
    • Communications of the Korean Mathematical Society
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    • v.38 no.1
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    • pp.223-234
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    • 2023
  • The main purpose of this paper is to study the lightlike hypersurface (M, $\overline{g}$) of cosymplectic space form $\overline{M}$(c). In this paper, we computed the Gauss and Codazzi formulae of (M, $\overline{g}$) of cosymplectic manifold ($\overline{M}$, g). We showed that we can't obtain screen semi-invariant lightlike hypersurface (SCI-LH) of $\overline{M}$(c) with parallel second fundamental form h, parallel screen distribution and c ≠ 0. We showed that if second fundamental form h and local second fundamental form B are parallel, then (M, $\overline{g}$) is totally geodesic. Finally we showed that if (M, $\overline{g}$) is umbilical, then cosymplectic manifold ($\overline{M}$, g) is flat.

The Experimental Study of Inorganic Performanent내s of Fire Resistance Evaluation (무기질계 영구거푸집의 내화성능에 관한 실험적 연구)

  • 김영진;백민수;정근호;김우재;정상진
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.10a
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    • pp.495-500
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    • 2002
  • The purpose of this study is to develop and to apply this permanent cement mortar form as one of those system forms to improve existing form's problems. (1) In the fire proof test with combined specimen, the fire proof covering including form section thickness is satisfied with the fire proof criterion. It is considered that form section thickness has no problem (2) The suitable method of normal pressure steam curing for the form's mass production is 4 hours in 65℃ considering production cost, the silica fume admixture is economic.

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