• Title/Summary/Keyword: land structure

Search Result 1,165, Processing Time 0.029 seconds

Numerical Study on the Behavior of Ground and Structure in Geosynthetic-Reinforced Soil (GRS) Integral Bridges

  • Sim, Youngjong;Jin, Kyu-Nam;Hong, Eun-Soo;Kim, Hansung;Park, Jun Kyung
    • Land and Housing Review
    • /
    • v.12 no.3
    • /
    • pp.97-108
    • /
    • 2021
  • In bridge abutment structures, lateral squeeze due to lateral stress of embankment placement and thermal movement of the bridge structure leads to failure of approach slabs, girders, and bridge bearings. Recently, GRS (Geosynthetic-Reinforced Soil) integral bridge has been proposed as a new countermeasure. The GRS integral bridge is a combining structure of a GRS retaining wall and an integral abutment bridge. In this study, numerical analyses which considered construction sequences and earthquake loading conditions are performed to compare the behaviors of conventional PSC (Pre-Stressed Concrete) girder bridge, traditional GRS integral bridge structure and GRS integral bridge with bracket structures (newly developed LH-type GRS integral bridge). The analysis results show that the GRS integral bridge with bracket structures is most stable compared with the others in an aspect of stress concentration and deformation on foundation ground including differential settlements between abutment and backfill. Furthermore, the GRS integral bridge with/without bracket structures was found to show the best performance in terms of seismic stability.

Fabrication of the Micro-structured DVD-RAM Substrates (미세 형상을 갖는 DVD-RAM 기판의 성형에 관한 연구)

  • 문수동
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2000.04a
    • /
    • pp.167-170
    • /
    • 2000
  • Recently the sub-micron structured substrates of 0.74 ${mu}ell$ track pitch and 800 $\AA$groove depth are required for DVD-RAM and the track pitch is expected to be narrower as the need for the information storage density is getting higher. For the accurate replication of the land-groove structure in the stamper to the plastic substrates it is important to control the injection -compression molding process such that the integrity of the replication for the land-groove structure is maximized. in the present study polycarbonate substrates were fabricated by injection comression molding and the land-groove structure regarded as one of mold temperature and the compression pressure on the integrity of the replication were examined experimentally. An efficient design methodology using the response surface method (RSM) the central composite design(CCD) technique and the analysis-of-variance (ANOVA) was developed to obtain the optimum processing conditions which maximize the integrity of the replication with a limited number of experiments.

  • PDF

Theme and Form in T. S. Elopt's "The Waste Land" (T. S. Eliot의 "The Waste Land"에 나타난 주제와 형식)

  • Yang, Hyun-Chul
    • English Language & Literature Teaching
    • /
    • no.4
    • /
    • pp.249-267
    • /
    • 1998
  • "The Waste Land" is Eliot's best known poem. It was first published in 1922 and became a famous poem in modem poetry by the 1940's. The poem is a statement of his personal experience with spiritual crisis, this simple outline is complicated and universalized by being set within the structure of 'the Fisher King legend'. The fisher King legend was studied by Miss Weston in From Ritual to Romance and Sir James Frazer in The Goldon Bough which traced the vegetation myths. It explained the cycle of the seasons in relation to the death and rebirth of a god. The god died in the winter with the death of the vegetation and was reborn in the spring with the rebirth of the vegetation. Sir James Frazer reaced these ancient rituals within the Christian world. He indicated that the death and rebirth of Christ falls within the pattern of this ancient ritual. Also Miss Weston transformed that ancient ritual into Christian terms, and connected it with the Quest for the Holy Grail. Eliot used not only the title, but the plan and a good of the important symbolism of the poem from these two books. "The Waste Land" is a difficult one because of the numerous interruptions in the narrative. On the superficial level, the story covers a 12-hour period in a day. It is also in "the stream of consciousness." It might be called the internal monologue; that is, "the free association of ideas in the mind of the narrator," Eliot experiments with both the idea of time and with the stream of consciousness, He employs a number of quotations and allusion from the Classic literature. So, his technique in "The Waste Land" consists of the juxtaposition of the present with mythcism and religious symbolism derived from the past. The structure of the poem is built out of the contrasts in time. The poem illustrates his conception of the past as an active part of the present. "The Waste Land" has "a symphonic structure" composed of five parts, which are linked by the repeated themes. The theme is the death and salvation of the Waste Land. It is drawn from the Fisher King myths. Moreover, he has absorbed into the structure of this poem the language, phrases, and associations of other writers. It gave the poem the universality both of theme and of pattern. Also, his intricate and fine techniques added the universality to the poet's personal material. At last, the verse pattern of the poem follow the same basic structure as the thematic patterns. Again in symphonic style, the verse varies from section to section. The interruption of real time is associated with the flow of consciousness. Though the poem is a complex structure, there are the interweavings of a great deal of ideas into a simple, brief statement. By these poetic techniques the poem manages to have good harmony and unity between the thematic pattern and narrative structure. "The Waste Land" therefore, became the greatest poem in the 20th century modern world.

  • PDF

A Reconstructive Study on the Urban Structure of the Original Masan Early in the 20th Century (20세기 초 원마산(原馬山) 도시공간의 복원적 연구 -1912년을 기준으로-)

  • Heo, Jeong-Do;Lee, Kyu-Sung
    • Journal of architectural history
    • /
    • v.9 no.1 s.22
    • /
    • pp.27-46
    • /
    • 2000
  • This study aims at examining the background and development process of Masan city after Koryo Dynasty, making a reconstructive map of Original Masan using the first registration maps made in 1912 and analyzing the urban structure of the Original Masan area. The origin of Masan city went back to Koryo dynasty. Around 1040 Koryo government placed an official shipping facility in Masan to transport the taxed grain to the capital city. After that Masan became an important port covering the southern part of KyungSang-Do. And the urbanization of the Original Masan began to bud after a shipping facility was again established by the Chosun Dynasty in 1760 and strengthened in the 19th century after the social standing system was broken and many peasants moved to cities as daily workers. In 1899 Masan was forced to be opened to foreign powers and they placed an international settlement distanced from the area(Original Masan). After this many Japanese advanced to the international settlement and further to the area. The advancement of Japanese brought a critical change in the urban structure of the area. Land was owned by Japanese and many modern sysytems were introduced such as modern buildings, new roads, railroad and modern factories. According to the reconstructive map of the area, 80.5% of land lots are less than $200m^2$ showing the size of each land lot is comparatively small. And Japanese occupied 31.5% of the land in the area. Their land was located on the stratigic points near the port and the center of commerce. The ratio of the road area to the whole land was around 14%, not so low for urban areas in that time. The reconstructive map reveals the exact coastline of the year 1912 erased now due to filling the sea and extending the land, Present Masan city has been developed having the Original Masan as its nucleus. The area has been always the center of urban activities for Masan city. Making an exact reconstructive map for the area and analyzing the urban structure of the area in 1912 is a very important work to understand Masan city wholy.

  • PDF

The Type setting and Application of the New-hanok type Public Buildings - Focused on Cases were completed after 2000 -

  • Park, Joon-Young;Kwon, Hyuck-Sam;Cheong, So-Yi;Bae, Kang-Won
    • KIEAE Journal
    • /
    • v.15 no.5
    • /
    • pp.47-57
    • /
    • 2015
  • Purpose: The purpose of this study is to set the type of 'the New-hanok type Public Buildings' through a case study for the hanok public buildings completed after 2000 years, and to analyze planned properties of the type. This is significant Establishing legal status of 'the New-hanok type Public Buildings' and seeing review of application possibilities of the type for providing a systematic government support measures of 'the New-hanok type public buildings' when models developing future. Method: Method of research is the first to examine the current laws and established the definition and legal status of 'the New-hanok type Public Buildings'. Followed by Setting the type classification criteria as to classify the type of 'the New-hanok type public buildings' and research architectural overview of selected cases by Literature, Internet searches, etc. After systematizing of the types classification of analysis cases, Characteristics of the type of the building structure looks catch classify in spatial structure, function, beauty. Finally, review application possibilities of the type for systematic government support measures establish when models developing of 'the New-hanok type Public Buildings' through a comprehensive analysis. Result: Selected cases were categorized as 3 types according by structural standard based on the core concept of 'the New-hanok type Public Buildings' set in this study. This can be divided into 'Wooden Structure type' and 'Composite structure - Convergence type' and 'Composite structure - juxtaposed type', 'Wooden Structure type' was re-classified by divided into '(1)Traditional Korean Wooden Structure' and '(2)Laminated Wood Wooden Structure'.

Land Suitability Analysis using GIS and Satellite Imagery

  • Yoo, Hwan-Hee;Kim, Seong-Sam;Ochirbae, Sukhee;Cho, Eun-Rae;Park, Hong-Gi
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.25 no.6_1
    • /
    • pp.499-505
    • /
    • 2007
  • A method of improving the correctness and confidence in land use classification as well as urban spatial structure analysis of local governments using GIS and satellite imagery is suggested. This study also compares and analyzes LSAS (Land Suitability Assessment System) results using two approaches-LSAS with priority classification, and LSAS using standard estimation factors without priority classification. The conclusions that can be drawn from this study are as follows. First, a method of maintaining up-to-date local government data by updating the LSAS database using high-resolution satellite imagery is suggested. Second, to formulate a scientific and reasonable land use plan from the viewpoint of territory development and urban management, a method of simultaneously processing the two described approaches is suggested. Finally, LSAS was constructed by using varieties of land information such as the cadastral map, the digital topographic map, varieties of thematic maps, and official land price data, and expects to utilize urban management plan establishment widely and effectively through regular data updating and problem resolution of data accuracy.

Subway Network Expansion and Spatial Restructuring of Accessibility in Seoul

  • Lee, Keum-Sook
    • Journal of the Korean Regional Science Association
    • /
    • v.11 no.2
    • /
    • pp.53-63
    • /
    • 1995
  • Changes in transport are reflected in the accessibility of a place, which is denoted as the inherent advantageous characteristics of a place with respect to overcoming spatial friction, and affect the land use ultimately. A composite accessibility measurement scheme is developed and applied to the subway network in Seoul, which has been constructed in 1972. Changes in the transport network are reflected in the spatial structure of accessibility and affect ultimately the land use pattern. Therefore, it is of relevance to examine the changes in the spatial structure of accessibility, which allows to forecast the direction of changes in the land use pattern.

  • PDF

Analyzing the Changes of Spatial Structure and Officially Assessed Land Price by Using Space Syntax (공간구문론을 이용한 공간구조와 공시지가 변화 분석)

  • CHO, Jung-Hun;MOON, Tae-Heon
    • Journal of the Korean Association of Geographic Information Studies
    • /
    • v.19 no.1
    • /
    • pp.43-52
    • /
    • 2016
  • Land price contains the comprehensive characteristics of urban space, representing the social and economic features of the city. Accordingly, land price can be utilized as an indicator, which can identify the changes of spatial structure and socioeconomic variations caused by urban development. This study attempted to explore the change in land price by the road construction. Methodologically, it adopted Space Syntax, which can interpret urban spatial structure comprehensively, to identify the relationship between the forms of road networks and land price. The analytical results show that the correlation between 'integration index of Space Syntax' with 'officially assessed land price' was the highest, and as integration was higher, 'officially assessed land price' increased. Subsequently, using regression equation, it tried to predict the land price changes of surrounding areas, according to the new road construction in case area. As shown above, the research methods or study results have the advantage of predicting the changes in land price that can attract high concern of residents in an easy way. In addition, it will contribute to establishing relevant polices and smoothing business promotion through the enhancing residents' understanding by suggesting the change in land price in advance before the execution of urban regeneration and development projects.

Classification Analysis of Road Network-Based Land Use Considering Spatial Structure (공간구조를 고려한 도로망 기반 토지이용의 분류분석)

  • Kim, Hye-Young;Jun, Chul-Min
    • Journal of the Korean Association of Geographic Information Studies
    • /
    • v.17 no.1
    • /
    • pp.24-34
    • /
    • 2014
  • To understand urban space and make appropriate plans, the integrative analyses considering road and land use simultaneously are required. In addition, studies that involve both horizontal and vertical spaces must be taken into consideration. Therefore, the purpose of this study is to conduct a classification analysis of road network-based land use considering spatial structure. The methods of this study were as follows; first, a space syntax theory considering the structure of road network was introduced for roads. For land use, to consider both horizontal and vertical development densities of residential and commercial buildings were used. And the explanatory power of three variables-Euclidean distance, global integration and length-reflected global integration-were compared. Third, based on road as an appropriate variable, modified-IPA was conducted with land use and the results were categorized into four areas. The proposed method was applied to Gangnam-gu, a CBD area in Seoul, and results were analyzed and visualized using GIS.

A Study of Factors Influencing of Temperature according to the Land Cover and Planting Structure in the City Park - A Case Study of Central Park in Bundang-gu, Seongnam - (도시공원의 토지피복 및 식재구조에 따른 온도 영향요인 규명 연구 - 성남시 분당구 중앙공원을 사례로 -)

  • Ki, Kyong-Seok;Han, Bong-Ho;Hur, Ji-Yeon
    • Korean Journal of Environment and Ecology
    • /
    • v.26 no.5
    • /
    • pp.801-811
    • /
    • 2012
  • The purpose of this study is to find out how land cover and planting of an urban park influence temperature. Field research on the land cover and planting status was conducted for Bundang Central Park in Sungnam-si. 30 study plots in the site were selected to closely analyze land cover type and planting structure. The temperature was measured 10 times for each plot. Land coverage type, planting type, planting layer structure and green space area (the ratio of green coverage, GVZ) were chosen as factors impacting temperature and statistics were analyzed for the actual temperature measured. Analysis on how the land coverage type influences temperature showed that planting site had a low temperature and that grassland and paved land had a high temperature. When it comes to planting type, the temperature at the land planted with conifers and broad-leaved trees was low, while the temperature at grassland and paved land was high. With regard to planting layer structure, canopy and canopy-underplanting type showed low temperature, while grassland and paved land showed high temperature. An analysis on the relation between green space area and temperature found out that both ratio of green coverage and GVZ had a high level of negative correlation with the temperature measured. According to regression model of green space area and the temperature measured, for every 1% increase in the ratio of green coverage, temperature is expected to lower by $0.002^{\circ}C$. Also, for every $1m^3/m^2$ increase in GVZ, temperature is expected to go down by $0.122^{\circ}C$.