柱圧縮試験による木造土壁の火災加熱時の非損傷性予測と木造土壁外壁の防火設計

概要

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Among different component fire safety performances required for load bearing external walls in urban districts, previous studies suggest that the mechanical fire safety performance normally dictate the whole fire safety of Japanese traditional wood/soil walls. In order to develop practical method for the development of fire safe traditional wood/soil walls, a predictive method using a compression test of wood post is proposed for the mechanical fire safety performance. The compression test uses a one-story long wood post specimen with the section engraved considering the charring and the reduction of the Young's modulus due to the fire exposure specified by the code requirement. Any design with buckling load not less than the load to be applied at the fire endurance test is assumed to comply with the code requirements for external walls. This method is verified against full scale tests using 3m×3m wall specimens, and finally has led to the new development of traditional wood/soil walls based on typical Kyoto historic townhouse construction rated as the "Fire Protective Construction".
社団法人日本建築学会の論文
2003-12-30