Fundamental Study on Estimated Disuse of Residential Houses

大规模生产和消费时代的结束表明，保护全球环境的努力具有重要意义，包括节约资源和能源以及资源的循环和再利用，这些措施正在讨论中，并将在不同领域实现。建筑业也不例外，它也在寻求环境保护的手段。为此，需要统计数据作为估计既有建筑报废的基本材料。目前，这些数据还不够充分，必须及时加以加强。因此，这项研究讨论了住房存量及其损失的情况，以及根据市政《固定资产和房屋分类账》中描述的数量估计的破坏情况，这被认为是关于住宅存量和淘汰单位的最可靠数据。它给出了以下发现。这项研究是在1990.1年的数据上进行的。T…进一步明确了专有住宅、公寓和多用途木屋、农房的存量和损失情况。木屋一般损失率约为1.45%，每年淘汰约46万套。房屋存量按建筑年限的分布在14~20年达到峰值，而房屋淘汰的分布在20~23年达到峰值。对于非木结构住宅，明确了钢筋混凝土、钢框架和轻钢框架建筑的存量和损耗情况。总体损失率大致为0.60%，导致每年淘汰约22,000个单位。按建筑年限划分的存量分布以18年及以下建筑为主，16~20年使用年限为建筑淘汰高峰。可以根据存量分布和按建筑年限淘汰的单位数量来估计废弃住宅的建筑垃圾数量。此外，该国的住宅建筑存量包括楼龄不超过20年的建筑，其中可能含有新建筑材料中的化学品等有害物质，以及用于防腐剂的农用化学品，其排放的废气可能危害环境。这些问题应该在质量阶段进一步研究。较少

The end of the mass production and consumption era suggests the significance of conservation efforts of the global environment, including the saving of resources and energy as well as circulation and reuses of resources, of which measures are under discussion and on the course of realization in different fields. Architectural industry, which is no exception to those efforts, is also addressing means for environmental conservation. For this purpose, statistic data are required as the basic materials to estimate the discarding of existing buildings. At present, such data are insufficient, and they must be promptly enhanced. This study, therefore, discusses the situation of housing stock and its loss as well as the estimated destruction based on the quantity described in municipal "Fixed Assets and Houses Ledger, " considered to be the most reliable data on the stock and eliminated units of residential buildings. It gave the findings below. The study was conducted on the data in 1990.1. T … More he situation of stock and loss of exclusively residential, apartments and multiple-purpose wooden houses and farm houses has been clarified. The general loss rate of wooden houses is about 1.45%, resulting in annual elimination of about 460,000 units. The distribution of house stock by building years has revealed its peak at 14 to 20 use years, while the distribution of house elimination has its peak at 20 to 23 use years.2. For non-wooden residential houses, the situation of stock and loss of reinforced concrete, steel-frame, and light gauge steel-frame buildings was clarified. The general loss rate is broadly 0.60%, resulting in annual elimination of about 22,000 units. The stock distribution by building years contains chiefly buildings of 18 years or less in age, and the distribution of building elimination has its peak at 16 to 20 use years.3. The quantity of construction waste from abolished residential houses can be estimated based on the distribution of stock and the number of eliminated units by building years. In addition, the stock of residential buildings in the country consists of buildings of 20 years or less in age, which can contain harmful substances such as chemicals in new building materials, and agricultural chemicals used in preservative agents, whose exhaust can endanger the environment. These problems should be further studied in the quality phase. Less