• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회 3차
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• pp.61-65
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• 2010

The performance of slopes during earthquake is often accessed in terms of permanent deformation. In the assessment of permanent deformation, Newmark-type rigid block analysis is widely used. Original Newmark-type block approach, however, assumes the potential sliding mass to be rigid, and has been criticized to be potentially unconservative. The paper reviews analytically the impact of this noncompliance assumption on computed permanent deformations. The results indicate that there is a simple criterion that can be used to determine the level of conservativeness of the rigid block approach in cases of gently-sloping slip surfaces and retaining walls.

• 한국조경학회지
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• 제27권1호
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• pp.101-109
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• 1999

The purpose of this study is to analyse types and forms of branch-road in traditional korean villages. To do this, this study has selected and measured 87 branch-road cases of five traditional villages. An analysis of the case study has revealed the following results : 1. Branch-roads have four formations : 3 way, 4 way, multi-way and others. 2. Branch-roads comprise 64 percent of 3 way, 18 percent of 4 way, 8 percent of multi-way and 9 percent of others, respectively. 3. Topographic conditions have mostly affected the formation of branch-roads. 3 way of branch - roads are easily found in flat village. 4 way are multi-way of branch-road are found in semi-hilly and hilly village 4. 3 way of branch-roads have three types: T-type, Y-type, and y-type. 5. T-types are easily found in flat village, but Y-type and y-type are found in semi-hilly and hilly village. 6. Each angle of T-type is 171,99,90, respectively. It has turned out 8 degree is slightly deviated form the square. 7. Y-type of branch-road has an asymmetric form, comprising 145, 128, 87 degree of the angle, compared to 150, 150, 60 degree of symmetric one. 8. Average angles of y-type that are mostly found in hilly village are 175, 113, 72. Angle differences from each spot are 62 and 41 degree. It is assumed that 39 degree is a slope of least effort to walk. 9. 4 way of branch-roads have not only "＋" type but various types of K, Y and Y, Y and y, T and y and a foot of bird. 10. It is assumed that multi-way of branch-roads, mostly found on the middle and bottom of the hilly slope, has naturally formed to connect up and down, left and right.and right.

• 한국주거학회논문집
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• 제18권3호
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• pp.31-40
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• 2007

This research starts from the questioning of current housing development situation on hilly sites in Korea. It aims to investigate various design techniques of terraced housing as an alternative housing type on sloped sites. Several generic solutions are proposed, as for site slope and stacking method, combination of dwelling units, access pattern, and sectional variation of unit space. By the comparative analysis of design proposals with the typical two-row vertical-access type, the efficiency of the proposed techniques are verified in terms of development density, provision of community space, habitability of dwelling units.

• 기술사
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• 제42권4호
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• pp.55-61
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• 2009

Retaining wall is a structure to stabilize the land slope as vertical retaining wall have constructed to make efficiency use of downtown area. Recently to commune with nature and refine a apartment and structure, natural friendly relations for retaining walls are tried to construct. The surface of the concrete walls are weave in various figures and colours, and in some places plant a shrub. Laying a landscape stone which have disclose a plane nature one means keeping up the natural slope, constructively safely set a anchor in front side and rear side wall between the natural stone, plant shrub or ground coverings to give shape into a rock. Natural stone is exposed of surface and planting the gardening, to be a type of natural friendly relations however that will be recycled. The size of blasted nature stone which is irregular become more natural type of one.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.832-836
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• 2004

This study was aimed to establish the acceptable contact force range between power collector and 3rd rail type conductor rail, and ramp slope for the Korean standardized rubber-tired AGT light rail vehicle. Dynamic behavior of the power collector, contact force variation and interruption in operation, were analyzed in the worst installation tolerance and various ramp slope of the conductor rail. The power collector was designed and manufactured to satisfy the Korean Standardized Specifications of the rubber-tired AGT light rail vehicle.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 추계 학술발표회 제16권2호
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• pp.477-480
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• 2004

This paper present test result to develop wedge-type anchor system for external prestressing method with CFRP. The test results indicated that the lower a slope angle and elastic of wedge are, the higher ultimate strengths are for plate types. Bar types showed premature failure because of local high stress in FRP of anchor system. Therefore, to improve the strength for bar types needs further work of strengthening sleeves, slope angles of wedge and materials.

• 한국철도학회논문집
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• 제6권2호
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• pp.81-86
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• 2003

This study proposes the neural network simulator for the integrity evaluation of weld zone in railway rails. For these purposes, the ultrasonic signals for defects(crack) of weld zone in frames are acquired in the type of time series data and echo strength. The detection of the natural defects in railway truck is performed using the characteristics of echodynamic pattern in ultrasonic signal. And then their applications evaluated feature extraction based on the time-frequency-attractor domain(peak to peak, rise time, rise slope, fall time, fall slope, pulse duration, power spectrum, and bandwidth) and attractor characteristics (fractal dimension and attractor quadrant) etc. The constructed neural network simulator agrees fairly well with the measured results of test block(defect location, beam propagation distance, echo strength, etc). The Proposed neural network simulator in this study can be used for the integrity evaluation of weld zone in railway rails.

• 한국주거학회논문집
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• 제20권1호
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• pp.45-58
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• 2009

This research starts from the questioning of current housing development on the hilly site in Korea. It aims to investigate various design techniques of low-rise housing as an alternative housing plan on hilly sites. Several generic solutions of the combination of building type and road pattern are tested for a simulation process, and evaluated in terms of crucial design issues; development density, parking space and open space. As a result, four reasonable models are selected for making full use of geographical features of hilly site, two models each land slope of $18^{\circ}$ and $26^{\circ}$. Several design techniques for each model are also suggested, in ensuring the development feasibility by considering land slope, vehicular access and parking, common open space, and community facilities.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2003년도 학술발표논문집
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• pp.315-318
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• 2003

A study was performed to examine the soil environment, vegetation type to the inside slope of sea dike. The soil pH was about 8.5, electric conductivity was $4.59dSm^{-1}$, soil strength was 12.1mm, organic matter was 0.21%. The vascular plants of the inside slope of sea dike were consisted of 101 taxa such as 26 families, 80 genera, 93 species, 8 varieties, 1 hybrid. The life cycle of the plants was annual 38.6%, biennial 14.8%, perennial 46.5%. As it compared with consistency ratio in the flora of korea, the distribution of annual, biennial appeared highly. From this examine, it appears that the environment need soil improvement using water holding materials and organic supplements.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.1304-1312
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• 2008

In this study, the analysis to the preference level on slope measuring instrument of weight values on effect factors find out the reasonable monitoring on slope was performed, in which used AHP(Analytic Hierarchy Process) techniques. The results on professional group, such as the industry, academic, institute and government, analyzed that the very important effect factors, which were indicator of various collapse type, convenience of instrument management, The evaluation of preference level on the slope measuring instrument analyzed the invar wire extensometer which was high level at convenience of install, economical efficiency of install and convenience of instrument management.