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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
LHI Journal of Land, Housing, and Urban Affairs
Journal Basic Information
Journal DOI :
Land and Housing Institute
Editor in Chief :
Volume & Issues
Volume 2, Issue 4 - Oct 2011
Volume 2, Issue 3 - Jul 2011
Volume 2, Issue 2 - Apr 2011
Volume 2, Issue 1 - Jan 2011
Selecting the target year
Research on the Residential Environment of New Town & Surrounding Area
Cho, Young-Tae ; Seong, Jang-Hwan ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 1~8
DOI : 10.5804/LHIJ.2011.2.1.001
During the 1990's, five new towns were constructed around Seoul such as Bun-Dang and Il-San. These new towns are very popular since they were created based on systemic urban planning and they provide various residential amenities. Many people consider them livable cities. Taking such advantages, other small-scale new public and private developments continued around those new towns and consequently created 'agglomerated region with new development'. The most representative area is Bun-Dang and north-western Yong-In area which are formed along the Seoul-Busan expressway. This area is a mega-community having more than one million residents in 2005.Judging from recent development trends in the Seoul metropolitan area, it is expected that the formation of other 'agglomerated region with new development' would be continued for the time being. This study is aimed to analyze the residential environment of Bun-Dang and north-western Yong-In and find implications to the management of 'agglomerated region with new development'. The relevant existing studies have their limits, only focusing on analyzing current conditions and pointing out current problems. This study could be differentiated from the existing analyses in that it conducted comprehensive analyses on various factors that constitute urban residential environment. The conclusion of this study was derived from diverse analyses of current development condition, residential sites, regional transportation, awareness of residents, and oversee cases.
A Study on the Enactment of Basic Laws on the Urban Regeneration
Song, Young-Hyun ; Lee, Chang-Ho ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 9~17
DOI : 10.5804/LHIJ.2011.2.1.009
A urban regeneration project of Korea has been promoted highly attaching to physical reforms, but without fulfilling the basic goal of reactivating city functions through concerning overall areas. Moreover, the general rule and its system of urban regeneration project which would provide roles of public and civilians as well as facilitate cooperative urban regeneration, are currently missing. Thus, social stratum continuously requests a framework act for urban regeneration project called Control Tower, to be a guide to the evidently right path to step up. The research analyzes the current status and problems of urban regeneration projects in Korea to examine the necessity of Control Tower, and to bring up the way to move on for its efficiency presented below: First, the law should be declarative; possess general, prospective influences on laws and systems related to urban regeneration. Second, the nonbinding guideline on a urban regeneration project should be suggested to reflect the conditions by the regions. Last, propulsions should be framed such as administrative principles of strengthening publicity and connection of urban regeneration projects, a committee and fund to promote the former, and a research for problem solution.
A Study on the Sustainability of the New Towns in Tokyo Metropolitan Area : Focusing on Self-Sufficiency and Social-Mix
Im, Chul-Woo ; Kim, Chang-Gi ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 19~33
DOI : 10.5804/LHIJ.2011.2.1.019
This study considers sustainability in new town development projects in the Tokyo metropolitan area. Since the mid-1980's the purpose of new Town projects in Japan changed from encouraging residential development to sustaining self-sufficiency within multi-functional cities. Nevertheless simultaneous increases in elderly population and declines in general population became the new town's key issue. Is this trend a general phenomenon in Tokyo? Has the multi-functional city policy failed? What policies can encourage new town self-sufficiency? Judging from this research, the new towns of Tokyo are relatively young areas with low aging rates and low rates of population decrease. Nevertheless, in view of the multi-functional city plan, levels of self-sufficiency and social-mix in most new towns are inadequate. Considering these, this research recommends new town plans be required to consider surrounding industries and the accessibility form CBD to encourage self-sufficiency. Moreover, The social mix plan encouraging residential diversity is important to the sustainability of the new town.
A Study on the Evaluation Criteria for Reconstruction Charge Allocation
Kim, Joo-Jin ; Song, Young-Hyun ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 35~46
DOI : 10.5804/LHIJ.2011.2.1.035
This paper aims at examining the indices and their weights for the evaluation of local government to allocate reconstruction charge and reviewing the availability of them simulating local governments' evaluation. There has been no specific evaluation criteria existed, while central government has to allocate the reconstruction charge to local governments by the provision 3 of Restitution of Housing Reconstruction Gains Act. The results as follows : According to a survey on evaluation indices weight and AHP analysis, the weight of 'the housing welfare improve effort' is the highest with 25.1% among 5 upper-classification indices. Following this, each weight of 'housing welfare conditions(22.7%)', 'housing SOC establishment(22.5%)', 'the achievement and planning on reconstruction charge use(15.8%)', and 'housing sector achievement such as Bogeumjari(13.9%)' are ranked. Meanwhile, Among 16 lower-classification indices, 'the rate of minimum housing standard households(11.5%)', 'public rental housing supply(8.9%)', 'reconstruction charge use achievement(8.3%)', 'reconstruction charge use planning submit(7.5%)', and 'rate of water and sewage(6.3%)' hold high rank. The analysis results show the weight of 'housing sector achievement such as Bogeumjari' on the existing provisions should be decreased(30%
13.9%) as others' weight has to be slightly increased. According to the result of the simulation, Jeonbuk, Gyeongbuk, Jeonnam, Jeju, Gyeonggi received higher scores in the comprehensive evaluation, while Daejeon, Seoul, Incheon, Daegu and Gwangju, where the housing conditions are relatively good, received lower scores. These results of the analysis correspond with the direction of reconstruction charges allocation and indicate that the evaluation criteria used in this simulation is acceptable.
Experimental Behavior of Circular Tube Members with 600MPa High-strength Steel
Lee, Eun-Taik ; Cho, Jae-Young ; Shim, Hyun-Ju ; Kim, Jin-Ho ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 47~52
DOI : 10.5804/LHIJ.2011.2.1.047
Recent advances of technology in materials science have made it easy to respond to user's needs on high performance steel in civil and building structures. The high-performance and high-strength steel are required for large scale structure and high-rise building to have high-strength, high fracture toughness and better weldability etc. Therefore development of 600MPa class steel for mega structure is necessary. high strength steels, however, may have mechanical properties that are significantly different from those of the conventional steels. The application of high-strength steels to building structures should be reviewed as to whether inelastic behavior equivalent to that of conventional steels can be attained or not. This study researched the structural behavior of high strength circular tubes compression and under flexure. Three column tests and three flexural tests were carried out. The suitability of existing design formulae(KBC 2009) and the structural behavior were investigated through these columns and beams with various types.
Development Properties of Rebar in Tension with High Strength Concrete
Park, Su-Hee ; Lee, Bum-Sik ; Kim, Sang-Yeon ; Park, Seoung-Sik ; Bae, Kee-Sun ; Kim, Seong-Deok ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 53~60
DOI : 10.5804/LHIJ.2011.2.1.053
In this study, development tests varying with concrete strength, development length, and the rate of fiber mix ratio are carried out to evaluate the development characteristics of high-strength concrete member with 80MPa, and the applicability of estimated standards of development length in KCI 2007. As a result, it can be expected that minimum development length of KCI 2007 is applicable to high-strength concrete member with 80MPa. Although the mixed fiber(NY+PP) to secure fire resistance performance of high-strength concrete is included up to 0.1%, it does not affect the development characteristics.
Structural Performance of RC Slab-Wall Joints Reinforced by Welded Deformed Steel Bar Mats
Park, Seong-Sik ; Yoon, Young-Ho ; Lee, Bum-Sik ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 61~68
DOI : 10.5804/LHIJ.2011.2.1.061
In order to clarify the structural performances of Welded Deformed Steel Bar Mats (WDSBM), the research stated includes the tests for standard hook of top bars of slab in concrete slab-wall joints, the tests for embedment length of top bar of slab, and the development strength tests for standard hook. The test results are as follows; (1) For slab-wall joints using WDSBM as reinforcement in slab, if the top bars of WDSBM are spliced by ordinary bars with sufficient development length and size, it is enough for the strength and crack control. (2) When WDSBM of slab is spliced in joint, the strength is increased with the embedment of bars of this WDSBM into wall. Beyond peak strength, however, ductility is diminished to that as no splice due to pull-out failure. (3) For slab-wall system, ultimate strain of concrete for flexural compression zone in lower surface of slab seems much greater than that of normal concrete beam. The reason is that normal concrete beam has the joint with
, however slab-wall joint has the
of which concrete can be confined.
Gradation Curve of Coarse Aggregate by Digital Image Analysis
Lee, Kwan-Ho ; Kim, Young-Jin ; Hwang, Tak-Jin ; Cho, Jae-Yoon ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 69~78
DOI : 10.5804/LHIJ.2011.2.1.069
The purpose of this research is particle shape evaluation of aggregate using Digital Image Process(DIP). DIP is very useful to measure the roughness and particle shape of aggregates. Couple of aggregates, like standard sand, two different crushed stones, and two different marine aggregates, have been employed. Shape factors of two different marine aggregates are ranged 0.35 to 0.54. Crushed stone I is 0.74 which is highly flat, but standard sand is elongated shape. Especially, two marine aggregate showed a big difference of width and length which meaned a long shape. There is any significant difference of elongation ratio and flatness for each aggregate with different measuring system, like direct measurement of vernier calipers and DIP method. Shape conversion coefficient and equivalent diameter for changing 2D image to 3D image by the Digital Image Process(DIP) have been suggested and modified particle size distribution curve has been showed. The measured flatness ratios of each aggregate were 0.30, 0.36, 0.47 and 0.83, respectively. Also, the conversion shape coefficients of each aggregate were determinded as 0.77, 0.78, 0.84 and 0.92. The size of aggregate has been modified by multiplying the shape conversion coefficient and the aggregate size from DIP. The modified gradation curve with modified volume and weight of aggregate has been suggested. Within the limited test results, DIP is one of useful to get the particle shape of aggregate with limitation of measuring errors and to apply the particle distribution curve.
A Study on Behaviour of Sandy Ground Reinforced by Geotextiles with Equal Vertical Spacings
Joo, In-Gon ; Park, Yong-Boo ; Park, Jong-Bae ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 79~85
DOI : 10.5804/LHIJ.2011.2.1.079
The bearing capacity of a soil can be improved by conventional ground improvement techniques such as stabilization and compaction methods. Recently, the use of geotextiles in improving the bearing capacity of soils has become popular because of the availability of durable and strong geosynthetic materials. In this paper, through the laboratory model tests on sandy ground reinforced by geotextiles with the strip footing under plane strain condition, the effects of bearing capacity improvement on the sandy ground and its behaviour were investigated.
The Single- and Two-Phase Anaerobic Digestion of Food Waste Effluent
HwangBo, Jun-Kwon ; Seo, Jae-Gun ; Yoon, Heui-Chul ; Park, Hyeon-Gun ; Lee, Bo-Won ;
LHI Journal of Land, Housing, and Urban Affairs , volume 2, issue 1, 2011, Pages 87~92
DOI : 10.5804/LHIJ.2011.2.1.087
The anaerobic digestion of food waste effluent through single- and two-phase process was estimated and compared in this study. The treatment efficiencies for total solid(TS), volatile solid(VS), tCOD(total COD) and sCOD(soluble COD) were invariably higher in the single-phase process, which was accounted for by the fact that the treatment efficiency of organic wastes usually showed an inverse relationship with organic loading rate in the anaerobic digestion. In fact, the organic loading rate was lower for single-phase process. The concentration of tCOD were significantly lower in two-phase process but much more biogas was produced, compared to single-phase anaerobic digestion process, which might be explained partly by the relatively higher stability of two-phase process resulting from the separation of acid phase from methane phase.