• 한국조경학회지
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• 제37권2호
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• pp.47-61
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• 2009

본 연구에서는 어린이놀이시설의 안전관리를 합리적으로 하기 위해 현재 적용되고 있는 어린이놀이시설 안전관리 관련법규를 조사 분석하여 문제점을 밝히고 개선방안을 제안하는데 목적이 있다. 연구를 위해 어린이놀이시설 안전관리의 기본법인 "어린이놀이시설 안전관리법" 및 "품질경영 및 공산품안전관리법"과 "도시공원 및 녹지 등에 관한 법률", "주택법", "아동복지법", "영유아보육법", "건설기술관리법" 등을 분석대상으로 하여 첫째, 어린이놀이시설 안전관리와 관련된 법률의 조항을 도출하여 분석하고, 둘째, 조경산업의 활동영역과 일치하게 어린이놀이시설의 제품개발, 설계, 시공, 유지관리의 전체적인 흐름에 기초하여 단계별로 법규의 적용 특성과 불합리한 문제점을 밝혀냈다. 마지막으로 바람직한 어린이놀이시설 안전관리체계를 운영하기 위한 개선방안을 제시하였으며, 연구의 결과는 다음과 같다. 1. 분석 결과 "어린이놀이시설 안전관리법"을 제정하고 안전검사기준 및 안전인증기준을 준비하면서 전문성이 있는 조경분야의 참여가 부족하였고, 소량 다품종의 특성을 갖는 어린이놀이시설의 특성과 어린이놀이행태에 대한 고려가 미흡하였다. 또한, 안전인증의 정기검사기간이 짧고, 사소한 변화에도 재인증을 받아야 하는 불합리한 점이 나타났으며, 제품검사와 공장심사의 중복과 수출입 놀이시설의 안전인증 중복, 설치검사의 "건설기술관리법"에 의한 품질관리 및 감리규정과 중복, 기 설치된 놀이시설의 설치검사 소급적용, 안전검사기관의 부족이라는 문제점이 도출되었다. 2. 바람직한 어린이놀이시설 안전관리를 위해 "어린이놀이시설 안전관리법"을 유지 발전시키고 관련법규와 상호조정을 통하여 종합적인 어린이놀이시설 안전관리체계의 구성이 필요하다. 또한, 안전인증 검사 기준을 우리나라의 실정에 맞도록 정비하는 동시에 국제적인 수준에 부합되도록 해야 하며, 안전인증 검사의 절차 방법을 합리화하여 안전인증 및 검사절차가 중복되거나 과다한 비용이 소모되지 않도록 하고 안전검사기관의 전문성 향상 및 안전검사기관의 확대가 필요하다. 향후 종합적인 어린이놀이시설 안전관리체계를 발전시키기 위해서는 현장에서 발생하는 문제점을 분석하여 관련법규의 재정비 및 법조항의 개정에 관한 심층적인 연구가 필요하다.

• Geomechanics and Engineering
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• 제29권6호
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• pp.697-706
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• 2022

In order to explore the stable anchoring conditions of coal side under the mining disturbance of soft section coal pillar in Wangcun Coal Mine of Chenghe Mining Area, the distribution model of the anchoring support pressure at the coal pillar side was established, using the strain-softening characteristics of the coal to study the distribution law of anchoring coal side support pressure. The analytical solution for the reinforcement anchorage stress in the coal pillar side was derived with the inelastic state mechanical model. The results show that the deformation angle of the roadway side and roof increases with the roof subsidence due to the mining influence at the adjacent working face, the plastic deformation zone extends to the depth of the coal side, and the increase of anchorage stress can effectively control the roof subsidence and further deterioration of plastic zone. The roadway height and the peak support pressure have a certain influence on the anchorage stress, the required anchorage stress of the coal side rises with the roadway height and the peak support pressure. The required anchorage stress of the coal pillar side decreases as the cohesion between the coal seam and the roof and floor and the anchor length increases. Then, applied the research result to Wangcun coal mine in Chenghe mining area, the design of anchor cable reinforcement support was proposed for the section of coal pillars side that has been anchored and deformed, which achieved great results and effectively controlled the convergence and deformation of the side, providing a safety guarantee for the roadway excavation and mining.

• 한국농촌건축학회논문집
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• 제20권1호
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• pp.27-36
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• 2018

At present, the elderly population in Korea is 14% of the total population and then We has entered an the society of advanced age. Along with this, elderly people with dementia and palsy are also increasing. The demand for elderly nursing homes for elderly people with severe diseases such as dementia and stroke is also increasing, and the existing buildings are being secured by Conversion of existing buildings. However, it is difficult to evacuate and fire due to the out of date of buildings by Conversion of existing buildings. For example, there is a fire in the Indukukwon, Pohang City and Hyosung Geriatric Hospital, Jangseong in Korea, which have changed the use of existing buildings. Many elderly people died in a night fire. It was because of the sandwich panel walls and PVC flooring material produced toxic gas instantly. In this study, we investigated the nursing home that changing the use and established fire prevention of human injury and countermeasure of evacuation. First, the sandwich panels which leading to deaths due to the toxic gas were installed in most nursing home. We recommend the RC, the masonry wall, and the glass fiber panel instead of the sandwich panels, In addition, the PVC flooring is most used in nursing home, the flooring material is considered such as the building stones, the tile, and the yellow soil closing instead of the PVC flooring. Second, we investigated the installation status of fire fighting equipment. As a result, the automatic-emergency open&shut equipment, the smoke ventilator and the evacuation slide were rarely installed. In order to secure the golden time in case of fire and to prevent the asphyxia caused by the toxic gas, the law should be amended to install the equipment.

• 한국실내디자인학회논문집
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• 제15권5호
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• pp.157-166
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• 2006

Recently, it appears several counterproposals about desirable figures of urban architecture. All of them proposes 'publicity' with cohernt tendency. The reason why it concentrates quantitative expansion of city without united design by urban plannar is that neglect quality values of city. As a solution of poor environment, there cue out the various efforts, about problem of each building, problem of city space, problem of laws and so forth. The reason why necessity of public space was embossed in that architecture extend the activity of citizen and make up the city space. But, each building pursues the private interest, so it is difficult to secure a public space with a high hand. Thus, architecture law has been revised in 1991 and bring the system of open space to match up the publicity and the private interest. Actually, western country brought it and obtained excellent results. While quantity of open space have increased since 1991, a lot of problems revealed in real usage and quality. By means of problem's solution, this study focus on the diversion of recognition for necessity of various open space. In result, on the occasion of approach and openess, except for several building, most glass a facade and the pedestrian can approach easily. Moreover, office buildings near the subway station connected with their low floor. So, the office buildings give openess to pedestrian and a people can approach easily to the buildings. On the occasion of amenity, most have bank and lobby on the first floor and have facilities on the underground floor. It leave open. But the reason why they have bank and lobby is that the space is dry and boring(without elements of nature and rest space). Hence, to make a space full of vitality, it have to plan various design elements and facilities. First of all, plan of indoor public space have to make up facility for the public interest. This study is basic investigation for necessity of indoor public space and through the survey of office buildings, it analyze the character of plan and find out the method of publicity's realization.

• 한국해양공학회지
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• 제33권3호
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• pp.259-271
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• 2019

It is important to obtain reasonable predictions of the extent of the damage during maritime accidents such as ship collisions and groundings. Many fracture models based on different mechanical backgrounds have been proposed and can be used to estimate the extent of damage involving ductile fracture. The goal of this study was to compare the damage extents provided by some selected fracture models. Instead of performing a new series of material constant calibration tests, the fracture test results for the ship building steel EH36 obtained by Park et al. (2019) were used which included specimens with different geometries such as central hole, pure shear, and notched tensile specimens. The test results were compared with seven ductile fracture surfaces: Johnson-Cook, Cockcroft-Latham-Oh, Bai-Wierzbicki, Modified Mohr-Coulomb, Lou-Huh, Maximum shear stress, and Hosford-Coulomb. The linear damage accumulation law was applied to consider the effect of the loading path on each fracture surface. The Swift-Voce combined constitutive model was used to accurately define the flow stress in a large strain region. The reliability of these simulations was verified by the good agreement between the axial tension force elongation relations captured from the tests and simulations without fracture assignment. The material constants corresponding to each fracture surface were calibrated using an optimization technique with the minimized object function of the residual sum of errors between the simulated and predicted stress triaxiality and load angle parameter values to fracture initiation. The reliabilities of the calibrated material constants of B-W, MMC, L-H, and HC were the best, whereas there was a high residual sum of errors in the case of the MMS, C-L-O, and J-C models. The most accurate fracture predictions for the fracture specimens were made by the B-W, MMC, L-H, and HC models.

• Geomechanics and Engineering
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• 제22권3호
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• pp.245-254
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• 2020

The interaction between the frozen soil and building structures deteriorates with the increasing temperature. A nuclear magnetic resonance (NMR) stratification test was conducted with respect to the unfrozen water content on the interface and a shear test was conducted on the frozen soil-structure interface to explore the shear characteristics of the frozen soil-structure interface and its failure mechanism during the thawing process. The test results showed that the unfrozen water at the interface during the thawing process can be clearly distributed in three stages, i.e., freezing, phase transition, and thawing, and that the shear strength of the interface decreases as the unfrozen water content increases. The internal friction angle and cohesive force display a change law of "as one falls, the other rises," and the minimum internal friction angle and maximum cohesive force can be observed at -1℃. In addition, the change characteristics of the interface strength parameters during the freezing process were compared, and the differences between the interface shear characteristics and failure mechanisms during the frozen soil-structure interface freezing-thawing process were discussed. The shear strength parameters of the interface was subjected to different changes during the freezing-thawing process because of the different interaction mechanisms of the molecular structures of ice and water in case of the ice-water phase transition of the test sample during the freezing-thawing process.

• Earthquakes and Structures
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• 제17권5호
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• pp.447-462
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• 2019

This present paper concerned with the analytic modelling for vibration of the functionally graded (FG) plates resting on non-variable and variable two parameter elastic foundation, based on two-dimensional elasticity using higher shear deformation theory. Our present theory has four unknown, which mean that have less than other higher order and lower theory, and we denote do not require the factor of correction like the first shear deformation theory. The indeterminate integral are introduced in the fields of displacement, it is allowed to reduce the number from five unknown to only four variables. The elastic foundations are assumed a classical model of Winkler-Pasternak with uniform distribution stiffness of the Winkler coefficient (kw), or it is with variables distribution coefficient (kw). The variable's stiffness of elastic foundation is supposed linear, parabolic and trigonometry along the length of functionally plate. The properties of the FG plates vary according to the thickness, following a simple distribution of the power law in terms of volume fractions of the constituents of the material. The equations of motions for natural frequency of the functionally graded plates resting on variables elastic foundation are derived using Hamilton principal. The government equations are resolved, with respect boundary condition for simply supported FG plate, employing Navier series solution. The extensive validation with other works found in the literature and our results are present in this work to demonstrate the efficient and accuracy of this analytic model to predict free vibration of FG plates, with and without the effect of variables elastic foundations.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제23권4호
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• pp.7-15
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• 2017

Purpose: The Korean government has implemented a Barrier Free Certification System since 2008 to create a secure and convenient environment for the socially disadvantaged. The drastic increase in the number of BF-certification facilities is expected due to the revision of the system and increasing the number of certification institutions. An analysis of individual evaluation items needs to be made for the BF-Certification with public confidence. Method: Korean standard, International Standard(ISO/FDIS 21542, 2011), German Standard(DIN 18040-1, 2010), Austrian Standard(${\ddot{O}}NORM$ B 1600, 2017) and Swiss Standard(Norm SIA 500 / SN 521 500, 2009) were investigated and analyzed. A comprehensive improvement plan is proposed by comparing details of the aforementioned standards and the evaluation items of BF-Certification. Results: Many problems arise in applying existing Barrier-free standards due to changes in population structure, environmental change and the use of powered wheelchairs. International standards are being improved to solve these problems. The korean standards also require improving of the Barrier Free Law and Certification System, which reflect these trends. In korean cases, standards such as the size of the doors (width and height), the Unobstructed Manoeuvring Space and Clear Space at the Latch side of the Door are required to improve standards in accordance with international standards. In addition, the expression of laws and evaluation items of BF-Certification should be clearly defined. And the application of visual contrast standards for the enhancement of perceptions presented in international standards should be considered. Implication: Barrier Free related legal standards and evaluation items of BF-Certification that are used in Korea are required to be revised in consideration of social and environmental changes. Comprehensive improvements should be made through detailed review.

• 한국조경학회지
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• 제41권3호
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• pp.83-93
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• 2013

본 연구는 1983년 설계공모 제도가 한국 조경계에 도입되고 30년이 지난 현 시점에서 조경 설계공모 과정에서 발생되고 있는 문제점을 분석 고찰함으로써 향후 조경 설계공모 과정 개선에 기여할 수 있는 기초자료를 제공하기 위한 목적으로 수행하였다. 연구를 수행하기 위해 조경 설계공모에 관여하는 전문가를 대상으로 델파이 조사를 실시하여 문제점을 도출하였으며, 그 결과는 다음과 같다. 첫째, 조경설계 공모 관련 이론과 선행연구를 분석한 결과, '설계공모 방식', '설계공모 지침', '당선작 선정과정', '당선작 이후 설계변화' 등 4가지 관점에서 문제점이 있는 것으로 나타났다. 둘째, 전문가 델파이 분석을 통하여 전문가들의 의견을 합의하는 과정을 이끌었고, 그 결과 총 12개의 항목으로 조경설계 공모 과정의 문제점이 도출되었는바, '설계공모 방식'에서는 '설계공모 기간의 문제', '설계공모 방식' 등 2가지의 항목, '설계공모 지침'에서는 '비위계적이고 혼란스러운 지침', '규정적으로 정해지는 지침', '지침의 분량의 과다' 등 3개 항목, '당선작 선정과정'에서는 '심사위원 전문성 결여', '비조경전문가 참여', '심사배점 방식에 문제점' 등 3개 항목, '당선작 이후 설계변화'에서는 '발주처 설계담당자의 잦은 인사이동', '설계기간의 기약 없는 과다연장', '발주처의견이 과다하게 반영되는 풍토', '원설계의 창의성을 저감시키는 발주처 의견' 등 4가지 항목이 문제점으로 나타났다.

• 한국조경학회지
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• 제33권1호
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• pp.1-9
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• 2005

The purpose of this study is to form a night-view at a university to satisfy users through case studies of four representative university campuses with analyzing the lighting conditions and facility satisfaction. The result of this study is following. From the present lighting status, there are 664(l9types) lightings at Kyunghee University, 350(17types) at Sungkyunkwan University and 437(l9types) at Ajou University. Main materials of the lightings are metal, iron and stainless. Moreover, most illuminants are white-colored metal-halide lamp. There is no specially designed lighting facility because ready-made goods were used. Furthermore, the locations of lightings are not suitable so some are useless. Most main spatial illuminations are not satisfying outdoor standard, so it can be concluded that the designs of present campuses are not carrying on with-out plans. From the result, present campus lighting does not satisfy the desire of users in aesthetic and functional point of view but consider the luminosity. However, even though the luminosity does not standardize the law. It is because the design does not reflect a suitable standard with desire of users and it does not have a long term plan. Moreover, the campus design has no study about development plan even though it has enough green area which has a potential possibility to overcome the lack of green areas in a city. Therefore, it is needed to design a comprehensive campus plan which satisfies the desire of students and residents with considering promotion of excitement and harmony through adjusting luminosity of the lighting facilities and supplying various lighting resources.