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Modeling of frost damage to roof materials under variable environmental conditions

Research Project

Project/Area Number 25870351
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Building structures/Materials
Architectural environment/Equipment
Research InstitutionKyoto University

Principal Investigator

IBA CHIEMI  京都大学, 工学(系)研究科(研究院), 助教 (10462342)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords凍結融解 / 屋根材 / 環境条件 / 劣化性状 / 解析モデル / 屋根
Outline of Final Research Achievements

The purpose of this study was to investigate the influence of variable environmental conditions such as solar radiation and rainfall on the frost damage to roof materials. Field surveying of frost damage on roof tiles was continually conducted. Based on the observed results, the moisture transport inside the tiles during the freezing process was estimated and a feasible deterioration mechanism was proposed. Frost damage was experimentally reproduced to be similar to that observed in a field survey, and the experimental results were examined by numerical analysis.
The temperature, humidity, and wetting conditions around the roof were measured using the roof model structures. The obtained data were used to validate the numerical modeling of frost damage under real climatic conditions. The numerical analysis revealed that temperature, moisture flow, and water content were dependent on the position of the tiles; therefore, the resulting ice contents were significantly different.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (9 results)

All 2015 2014 Other

All Presentation (9 results)

  • [Presentation] 温暖地における屋根瓦の凍結劣化に関する研究(その3)凍結劣化部位と含氷率分布の関係に関する検討2015

    • Author(s)
      植田あゆ美、伊庭千恵美、鉾井修一、小椋大輔
    • Organizer
      日本建築学会大会学術講演会
    • Place of Presentation
      東海大学(平塚市)
    • Year and Date
      2015-09-04 – 2015-09-06
    • Related Report
      2014 Annual Research Report
  • [Presentation] 温暖地における屋根瓦の凍結劣化に関する研究(その4)瓦裏面空気層の温湿度測定2015

    • Author(s)
      伊庭千恵美、植田あゆ美、鉾井修一
    • Organizer
      日本建築学会大会学術講演会
    • Place of Presentation
      東海大学(平塚市)
    • Year and Date
      2015-09-04 – 2015-09-06
    • Related Report
      2014 Annual Research Report
  • [Presentation] 温暖地における屋根瓦の凍結劣化に関する研究 (その3)凍結劣化部位と含氷率分布の関係に関する検討2015

    • Author(s)
      植田あゆ美、伊庭千恵美、鉾井修一、小椋大輔
    • Organizer
      日本建築学会近畿支部研究発表会
    • Place of Presentation
      大阪保健医療大学(大阪市)
    • Year and Date
      2015-06-27
    • Related Report
      2014 Annual Research Report
  • [Presentation] 温暖地における屋根瓦の凍結劣化に関する研究 (その4)瓦裏面空気層の温湿度測定2015

    • Author(s)
      伊庭千恵美、植田あゆ美、鉾井修一
    • Organizer
      日本建築学会近畿支部研究発表会
    • Place of Presentation
      大阪保健医療大学(大阪市)
    • Year and Date
      2015-06-27
    • Related Report
      2014 Annual Research Report
  • [Presentation] Frost damage to roof tiles: Ice distribution in freeze-thaw experiment2015

    • Author(s)
      Ayumi Ueda, Chiemi Iba, Shuichi Hokoi
    • Organizer
      6th International Building Physics Conference
    • Place of Presentation
      Politecnico di Torino (イタリア・トリノ)
    • Year and Date
      2015-06-15 – 2015-06-17
    • Related Report
      2014 Annual Research Report
  • [Presentation] Frost Damage of Roof Tiles: A Study on Moisture Boundary Conditions2015

    • Author(s)
      Chiemi Iba, Ayumi Ueda, Shuichi Hokoi
    • Organizer
      6th International Building Physics Conference
    • Place of Presentation
      Politecnico di Torino (イタリア・トリノ)
    • Year and Date
      2015-06-15 – 2015-06-17
    • Related Report
      2014 Annual Research Report
  • [Presentation] Field Survey and Analysis on Frost Damage of Roof Tiles Under Climatic Impact2015

    • Author(s)
      Chiemi Iba, Ayumi Ueda, Shuichi Hokoi
    • Organizer
      1st International Symposium on Building Pathology
    • Place of Presentation
      Faculty of Engineering of the University of Porto (ポルトガル・ポルト)
    • Year and Date
      2015-03-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] 温暖地における屋根瓦の凍結劣化関す研究 (その2)塀瓦の温度測定と劣化要因の検討2014

    • Author(s)
      植田あゆ美、伊庭千恵美、鉾井修一、小椋大輔
    • Organizer
      日本建築学会大会学術講演会
    • Place of Presentation
      神戸大学
    • Related Report
      2013 Research-status Report
  • [Presentation] 温暖地における屋根瓦の凍結劣化に関する研究(その2)塀瓦の温度測定と劣化要因の検討

    • Author(s)
      植田あゆ美、伊庭千恵美、鉾井修一、小椋大輔
    • Organizer
      日本建築学会近畿支部研究発表会
    • Place of Presentation
      大阪工業技術専門学校(大阪市)
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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