日本建築学会技術報告集
Online ISSN : 1881-8188
Print ISSN : 1341-9463
ISSN-L : 1341-9463
15 巻 , 29 号
選択された号の論文の69件中1~50を表示しています
材料施工
構造
環境工学
  • 鉄道により高振動数が卓越する床面の解析
    佐野 泰之, 伊積 康彦, 横島 潤紀, 冨田 隆太, 石橋 敏久, 平松 和嗣, 成瀬 治興, 後藤 剛史
    2009 年 15 巻 29 号 p. 151-154
    発行日: 2009/02/20
    公開日: 2009/04/08
    ジャーナル フリー
    The previous papers reports the characteristics of vibrations measured in a wooden house located beside rail tracks when trains passed by. A predominant frequency component of the floor vibrations was found at a frequency around 63 Hz, while the AIJ guidelines for the evaluation of habitability to building vibration covers the frequency range between 3 and 30 Hz. The Subcommittee on Measurement Technique of Environmental Vibration of AIJ, Naruse Laboratory at Aichi Institute of Technology, and Goto Laboratory at Hosei University jointly implemented an experimental study of the house vibration. This paper reports an experimental modal analysis of the floor of the house and discusses the mechanism of the vibration modes at around 63 Hz.
  • 山崎 真理子, 水谷 章夫, 大澤 徹夫
    2009 年 15 巻 29 号 p. 155-158
    発行日: 2009/02/20
    公開日: 2009/04/08
    ジャーナル フリー
    The thermal properties of the greening of the rooftop and walls were investigated through the comparison with non-green walls and walls covered by shade cloths in the experiment conducted using two experiment buildings with thermal thin walls. Also, the cooling load reduction effect of the green roof and walls was quantitatively evaluated. The obtained results were as followed. 1) The room temperature of the green building was lower than that of the non-green building because of the sun-shielding effect by plants. Electrical power consumption for air conditioning was also lower in the green building. With green roof and walls on the south and west sides, 40 to 45% energy was saved compared to the non-green building. 2) The coefficient of overall heat transmission of the green walls calculated with the power consumption by air conditioning was estimated 1.09 [W/m2 K].
  • 木下 進一, 吉田 篤正
    2009 年 15 巻 29 号 p. 159-162
    発行日: 2009/02/20
    公開日: 2009/04/08
    ジャーナル フリー
    The urban heat island is mainly caused by increase of air conditioning load with increase of surface temperature and heat radiation in the night related to large amount of absorption of insolation radiation in the daytime on the external surface. As a method of mitigation of these effects, covering building envelopes with high reflection materials is effective. In this study, on-site measurement is made for cool surfaces covered with painted layer and waterproof sheet with high reflectivity for the insolation. Calibration of reflectivity including the influence of the surroundings is performed by using standard reflecting plates with known reflectivity. Error factors in the measurement are evaluated.
  • 鍵 直樹, 池田 耕一, 柳 宇, 長谷川 あゆみ
    2009 年 15 巻 29 号 p. 163-166
    発行日: 2009/02/20
    公開日: 2009/04/08
    ジャーナル フリー
    In recent years, volatile organic compounds have caused chemical sensitivity by increasing indoor air pollutant concentrations. In order to solve the problem, Ministry of Health, Labour and Welfare of Japanese Government established the guideline values for indoor air concentrations, such as formaldehyde, acetaldehyde, toluene and so on. However it is not clear that accuracy of the measurement method for volatile organic compounds in indoor air is sufficient enough to judge the indoor air quality of the room to the guidelines.
    This study aimed at investigating precision of the analytical method using DNPH cartridge for indoor formaldehyde and acetaldehyde concentrations. Sample cartridges of the blank, standard and indoor air were prepared. The 5 kinds of DNPH cartridges were used to analyze dispersion of the test results, and the samples for laboratory tests using HPLC were sent to 11 laboratories. Since the CV values were under 20%, the dispersion was not too large. The dispersions found in data were considered to be caused by accuracy of cartridges and analyzing performance of each laboratory. We should recognize that data for indoor concentrations by DNPH cartridge could be fairly dispersed.
  • 塩谷 正樹, 桑原 亮一, 鬼頭 則夫, 佐藤 英樹
    2009 年 15 巻 29 号 p. 167-172
    発行日: 2009/02/20
    公開日: 2009/04/08
    ジャーナル フリー
    We constructed the operation control system of radiant cooling and heating system by using ceiling panel for the purpose of providing indoor environment with thermal comfort. The control system, which controlled the supply temperature or the flow rate of heat supply water for radiant panel optimally, was able to maintain the constant mean radiant temperature and to improve the follow-up ability for heat load fluctuation. In this paper, we reported the results of field measurement in our demonstration room and we described the effectiveness of the system from the viewpoints of indoor thermal environment and energy efficiency ratio.
  • 中村 卓司, 川島 実, 長野 克則
    2009 年 15 巻 29 号 p. 173-178
    発行日: 2009/02/20
    公開日: 2009/04/08
    ジャーナル フリー
    A series of experiment for building thermal mass storage system was carried out using the real-scale experiment unit which can reproduce the real condition. The experimental condition varies direction of blowing, flow rate, installation density of diffuser and flow temperature in order to clarify their characteristics of charging and discharging thermal storage into the slab. The result shows that the rate of charge to the building materials including slab is between 70% from 80%. And uniformity of supply air blowing is effective for charging to the slab.
  • 何 江, 梅干野 晁, 町田 康幸, 中大窪 千晶, 嚴 泰潤
    2009 年 15 巻 29 号 p. 179-182
    発行日: 2009/02/20
    公開日: 2009/04/08
    ジャーナル フリー
    This paper presents a numerical simulation method to predict and evaluate the thermal environment in the developed urban locations where void-brick walls with evaporative cooling effect were applied, using the 3D CAD-based simulator developed by the authors. The thermal modeling of a void-brick wall was proposed from the experimental data and calculation algorism of its surface temperature was integrated into the simulator. A case study was carried out to quantify the thermal improvement of the void-brick wall applied to a bus waiting arbor. The simulation results show that the developed simulation tool can be used as a design tool to evaluate the thermal effect of the void-brick wall on the urban built environment.
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