積雪期の地震に対する木造住宅の耐震性に関する研究 : 振動による屋根雪の動的挙動と構造体の応答特性との関係について

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To examine relationship between dynamic behavior of roof snow and seismic response of wooden houses by strong ground motion, the authors carried out shaking table test. The structure of one-story and flat roof with steel sheet roofing was used as the model in the test. Harmonic vibration was used as seismic wave in the test. Adfreezing of roof snow and roof surface projection that restricted roof snow sliding was recreated in the model. Relationship between sliding restriction conditions and breaking form of roof snow was observed. Sliding conditions after roof snow break were recreated in the test that changed roof surface condition and roof snow weight. Relationship between friction resistance of sliding surface and response characteristics of the model was examined by the test. The roof snow break from weak layer and one section in wet snow might occur in strong ground motion. In the evaluation of seismic performance of wooden houses during snow season, necessity to consider the ground motion scale, sliding surface characteristics of roof snow was clarified.
2009-01-30