• 교육녹색환경연구
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• 제10권1호
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• pp.10-25
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• 2011

Area Offices of Education in Korea assign and execute government budget based on the evaluation of school buildings' safety rating and degree of their deterioration. However, it is never easy to estimate the most appropriate investment amount for old buildings under consideration of their service lives and residual values together. A model of estimating optimum investment cost for obsolete school building is developed taking its life cycle cost into account. The model is also applied to six old buildings in five different schools and found that some of the facilities hardly needed further investment and were better to be rebuilt. The study results will be a great beneficial for officers to make right decision on maintaining obsolete school buildings and to maximize tax payers' money.

• Architectural research
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• 제15권1호
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• pp.25-33
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• 2013

The amount of construction waste increased to 176,447 ton/day in 2008 from 28,400 ton/day in 2000, a 6-fold increase in just 10 years. Such dramatic increase in the waste of concrete, asphalt concrete, wood and metals was due to demolition of old buildings as well as a great number of building redevelopment projects and hurried city industrialization. Many buildings targeted for demolition today were built in line with the government policy to provide affordable housing to citizens in the shortest time possible and consequently, said buildings underwent rapid deterioration and required periodic repairs and reconstruction. Based on the above, we predict that construction waste will continue to increase for the foreseeable future. In particular, due to limited availability of suitable space to construct apartments and residential buildings in the city, old buildings are being torn down to make space for new development, further increasing construction waste. In light of that, efforts to recycle as well as reduce generated waste are urgently required.

• Earthquakes and Structures
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• 제2권1호
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• pp.25-42
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• 2011

This paper discusses a mechanical model for the vulnerability assessment of old masonry building aggregates that takes into account the uncertainties inherent to the building parameters, to the seismic demand and to the model error. The structural capacity is represented as an analytical function of a selected number of geometrical and mechanical parameters. Applying a suitable procedure for the uncertainty propagation, the statistical moments of the capacity curve are obtained as a function of the statistical moments of the input parameters, showing the role of each one in the overall capacity definition. The seismic demand is represented by response spectra; vulnerability analysis is carried out with respect to a certain number of random limit states. Fragility curves are derived taking into account the uncertainties of each quantity involved.

• 한국조경학회지
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• 제32권6호
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• pp.36-51
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• 2005

The purpose of this thesis is to analyse modem urbanization process and the morphological transformation of the urban tissues in Kunsan between the you 1899 and 2001, The method of this study is to investigate the transformation process of morphological elements such as plot structure, building layout, building facades, land use, exterior space structure and their use, with actual field surveys, the analysis of land registration maps in 1912, and various topological map. Morphological analysis on modern Kunsan is progressed by three steps-typo-morphological analysis of urban tissue in old-town area, interpretation of morphological process, and transformation process, of morphological structure in Japanese concession in view of plots system. As a result, it is found that there is cyclical relationship among the morphological transformation processes of morphological elements, plots, buildings, land-uses, and access space to buildings. From the view of town plan change, the period of restoration of war damage in 1950s and compressive growing period in 1960s have important meaning in the morphological process of old-town area. Particularly the first building plan and layout type together with plot form and structure is acted as the main factor to decide the subsequent plot transformation system, exterior space system and the particular streetscape in Kunsan.

• 대한건축학회논문집:계획계
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• 제34권2호
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• pp.107-118
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• 2018

A primary objective the Conjoint Building Program(CBP), as articulated in the legislation proceedings as to stimulate renewal and regeneration of old deteriorated districts. By allowing the transfer of development rights between two lots located within 100m radius or the same block surrounded by 12m wide streets, CBP encourages reconstruction of old buildings with low investment value by linking it to another lot that can buy its unused floor area ration. Most of the debates and studies prior to the introduction of the new legislation focused on possible abuse in financial terms, and little research has been done to illustrate possible merits of deficiencies in term of urban morphological influences. This study offers a visual prediction of the various ways CBP can influence an urban block by reshaping and reorganizing it thrown augmented development rights to assess the pros and cons of the current program.

• Earthquakes and Structures
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• 제20권3호
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• pp.337-351
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• 2021

On September 12, 2016, the Gyeongju earthquake occurred in the south-eastern region of the Korean peninsula. The event was ranked as the largest magnitude earthquake (=5.8) since instrumental recording was started by the Korean Metrological Administration (KMA) in 1978. The objective of this study is to provide information obtained from the 2016 Gyeongju earthquake and to propose a procedure estimating seismic risk of a typical old RC building for past and potential earthquakes. Ground motions are simulated using the point source model at 4941 grid locations in the Korean peninsula that resulted from the Gyeongju earthquake and from potential future earthquakes with the same hypocenter considering different soil conditions. Nonlinear response history analyses are conducted for each grid location using a three-story gravity-designed reinforced concrete (RC) frame that most closely represents conventional old school and public buildings. Then, contour maps are constructed to present the seismic risk associated with this building for the Gyeongju earthquake and potential future scenario earthquakes. These contour maps can be useful in the development of a mitigation plan for potential earthquake damage to school and public buildings at all grid locations on the Korean peninsula.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.197-198
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• 2022

Based on the carbonation depth measurement by the indicator for concrete collected from old structures and the quantitative analysis of Ca(OH)₂ and CO₂ in the carbonation section before and after the carbonation depth and in the non-carbonation section, the absorbable CO2 amount and carbonation degree measurement result is as follows 1) The carbonation depth of the 40-year-old reinforced concrete structure was measured to be about 22 mm. (basement interior wall, marble finish, strength 30MPa) 2) The amount of CO₂ absorbed by the concrete was about 4.3% of the sample weight, and the carbonation degree was estimated to be about 53%.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.1081-1090
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• 2003

• 교육시설
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• 제19권4호
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• pp.22-25
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• 2012

• 기술사
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• 제21권2호
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• pp.51-57
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• 1988

The writer has worked out his original philosophy both scientific and religious, which he calls "Knownism" The new thought states; the word "known" in "knownism" means "already well-informed in the providence" about the essence of the things, and the true state of the reality, hence the knownism, as the existence of God is set forth as a premise. The knownism is a philosophy unified reasonably the science and the faith into one, for the humans can perceive and realize the essence and the true state, and authorize the truth transcending the experience by the scientific method. The new thought of the knownism is a bridge-building between the natural science and the religious faith. The idea explains that the life is the process to pursue the essence of the things and the god, and the truth is immanent in the original nature of things and in God′s sphere. This thought is a philorophy of possibility to solve the paradigms-to-be such as thinking, faith experience, and supernatural power, so that it presents a vision in the human life as a profitable religious science philosophy. The knownism is much different from agnosticism, skepticism, empiricism, and agnosticism. The grace of God may be detected differently from the supernatural power. The new dark clouds overspread abruptly the summer sky are not new ones but originally derived frosm worn-out water drops. Thus those are called the old clouds. The Korean word "known"(노운) of which pronunciation is same with the English "known" means the old clouds, hence also the name, Knownism. The root of the new clouds is detectable from the preserved old clouds. The old clouds symbolized in the paper indicate the essence and the principles of the things and the fittest, or the key for the solution of the problem in the epistemology, believing that everything has its own, proper nature, the writer sums up his theory by insisting that the humans have to find out the "old clouds" or the "known" in knownism to live eternally either in this world or in other dimensions, though the human beings are transformed into the other phases of life. The writer proclaims through the ideas for the United Nations to fortify the Confederate System of World Nations in order to ensure the world peace and the future of the humans.