Relationship between the Vertical Load Properties of Floors and Human Sensory Evaluations of Walking Vibration in Wooden Schools and Offices II.: Possibility of a tentative design target for large-span wooden floors according to human sensory evaluations of walking vibration@@@歩行振動の感覚評価による木造大スパン床の設計

Abstract

Walking is an essential part of life or work and causes floor vibrations. Recently, the need for largescale wooden buildings has been increasing. However, there is no guide to design for floor vibrations caused by walking of large-span wooden floors. Therefore we considered the relationship between vertical vibration and properties of wooden school and office floors and human sensory evaluation. We found that the percentage of persons indicating perception of vibration, expecting those who answered unnoticed, was larger than the perception probability indicated in Guideline for the evaluation of habitability to building vibration published by Architectural Institute of Japan (AIJ). When the floor response acceleration was over 4 cm/s, the percentage of persons who perceived the vibration was 100 %. At the next step, we considered the relationship between the weighted acceleration level according to frequencies and the ratio of deflections including creep to spans, calculated by the experimental stiffness. Finally we suggest a tentative design target for large-span wooden floor as follows. In order to