Remodeling appeared to be an alternative against reconstruction that had an effect on the improvement for the old apartment house of a city and supply of new housing but also brought a large number of urban problems, and to be increase of concern on e...
Remodeling appeared to be an alternative against reconstruction that had an effect on the improvement for the old apartment house of a city and supply of new housing but also brought a large number of urban problems, and to be increase of concern on environment of the 90's.
This is a study on the analysis and the inspection as to a special environment quality that remodeling has, through the analysis of design elements on before and after remodeling on comparison of internal and external influence of reconstruction and remodeling, that is sunshine, parking, density for revitalization of remodeling.
It is concentrate upon the subjects for the institutionalized remodeling is enlargement of a building, relief of density limitation represented by lighten of the building coverage and the floor area ratio, and strongly linked elements to residential environment such as the sunshine, parking, and so on, for prescribing characteristics of remodeling design elements.
In comparison of internal and external influence of reconstruction and remodeling, as the result after studying internal influence of remodeling, sunshine environment comes out the decline situation of sunshine by diminution to pitch of building(1H→0.88H~0.92H), and parking environment shows up disadvantage(reconstruction: 1.7~1.9/unit, remodeling: 1.2~1.4 /unit) than reconstruction. but, in the density environment, in case that the floor area ratio of the existing houses is high, the remodeling has the characteristic of improving the housing density highly and easily. (reconstruction: 107%→241%, remodeling 207%→282%).
On the basis that the external influence changed by remodeling is similar to the origin condition, in the result of the analysis through the comparison of the before and after reconstruction, external influence, the shadow area of outside increases to 2.6 times~10times and the landscape environment increases to 0.78times~2.5times in the blockage ratio of view and to 2.3times~7.5times in visual blockage ratio of elevation. And raising volume of building waste come to pass more nearly around 5times than remodeling of a scale to equal.
This results shows that the remodeling is better desirable method in reformation of urban dwelling environment, because the reconstruction has the negative influence on the external although it takes advantages on the internal as far as it goes.
Analysis of design elements on the before and after of remodeling, in case of sunshine circumstance, showed results to be worse about 5.3% additionally, compared with before remodeling.
For the sunshine influence by increase of density, additional sunshine decline started from dwelling exclusive area 13.75% of extend, and kept up the same condition to extend of 57%. and in case of additional extend the sunshine decline came out in accumulated condition.
In analysis of parking condition to be connected with density for analysis on parking circumstance, the basement 2nd (about 1.4/unit) is needed in extend of dwelling exclusive area 11.2%~11.8%, and the basement 3rd (about 1.8~1.9/unit) in case of 43.3%~49.4% extend.
In the result compared with an example of actually plan, because of difference of site circumstance, plan method, etc. it is possible to park of 1.2~1.5 per unit in planning basement 2nd plan.
Improvement of parking environment in remodeling comes out as the most important demand by case studies, and on the analysis of improving status of parking environment it is shown that the parking circumstance (increase of parking area) improves nearly around 30.9%~62.7% compare with pre-existence parking in case of remodeling. General confirmed method of parking area in the remodeling is underground parking lot and using deck.
In the institution of parking concerned with remodeling, it shall be improved that more than 50,000㎡ total building space shall take the traffic impact assessment, because that remodeling has not some additional traffic induction and improves traffic circumstance.
Analysis of a special quality for density, in results of time-series analysis, shows that apartment housing of more than the building-to- land-ratio 200% is remodeling due to the appeasement policy of floor area ratio in the early 90's.
Analysis results on the circumstance of these apartments shows up increase of density, that existing 180% is to 250%, and 210% is to 300%.
In this results, if density becomes a standard of judgment of reconstruction and remodeling, reconstruction can be a method improving apartment housing under the existing building-to-land-ratio 180% and remodeling can be more than 180%, in the system of the present.
But if the building-to-land-ratio of 3rd general residing region would the increase to 300% by a appeasement policy of government, apartments of existing about 210% can be most likely possible to be changed to the reconstruction work.
This policy alteration has restrictive effects in the reconstruction market but on the other hand it is to be an obstacle not only in revitalization for eco-construction fields, but also for development in this field improving in self-regulation with nongovernmental. therefore, it is on the time that intelligent public policy is needed.