Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD AND DEVICE FOR MEASURING TSUNAMI WAVE FORCE
PROBLEM TO BE SOLVED: To correctly assess an impact of air reservoir formed in a recess on an undersurface side of a structure.SOLUTION: A bridge girder model 12 has recesses 16a, 16b, 16c on an undersurface side that correspond to an actual bridge girder. A lifting platform 8 is installed on a carriage 4 of a towing water tank 1, the lifting platform being lifted/lowered by a ball screw mechanism 9, and the bridge girder model 12 is fitted underneath with a load cell 10 and a connecting member 11 in between. The carriage 4 is driven at a speed equivalent to a wave flow speed derived by modeling a tsunami to suit a scale of the bridge girder model 12, and the bridge girder model 12 is submerged to a prescribed depth from a position in contact with a water surface 7a, at a position control amount corresponding to chronologically changing additive inverse of the water level of the tsunami model wave. An amount of air in an air reservoir generated in the recesses 16a, 16b, 16c of the bridge girder model 12 simulates an actual bridge girder submerging due to tsunami. Thus, a load exerted on the bridge girder model 12 is measured in this state, and the tsunami wave force exerted on the bridge girder is derived based on the measurement result.SELECTED DRAWING: Figure 1
【課題】 構造物下面側の凹部に生じる空気溜まりの影響を正しく評価する。【解決手段】 橋桁模型１２は、実際の橋桁に対応する凹部１６ａ，１６ｂ，１６ｃを下面側に備える。曳航水槽１の台車４には、ボールねじ機構９により昇降動作可能な昇降台８を設け、その下側に、ロードセル１０と連結部材１１を介して橋桁模型１２を取り付ける。台車４を、津波を橋桁模型１２の縮尺に応じてモデル化した波の流速に一致した速度で走行させた状態で、橋桁模型１２を、水面７ａに接する位置から、津波をモデル化した波の時系列変化する水位の反数に応じた位置制御量で、所定の深度まで水没させる。橋桁模型１２の凹部１６ａ，１６ｂ，１６ｃに生じる空気溜まりの空気量は、実際の橋桁が津波を受けて水没する状態を模したものとなるので、この状態で、橋桁模型１２に作用する荷重を計測し、その計測結果を基に、橋桁が津波より受ける波力を求める。【選択図】図１
METHOD AND DEVICE FOR MEASURING TSUNAMI WAVE FORCE
PROBLEM TO BE SOLVED: To correctly assess an impact of air reservoir formed in a recess on an undersurface side of a structure.SOLUTION: A bridge girder model 12 has recesses 16a, 16b, 16c on an undersurface side that correspond to an actual bridge girder. A lifting platform 8 is installed on a carriage 4 of a towing water tank 1, the lifting platform being lifted/lowered by a ball screw mechanism 9, and the bridge girder model 12 is fitted underneath with a load cell 10 and a connecting member 11 in between. The carriage 4 is driven at a speed equivalent to a wave flow speed derived by modeling a tsunami to suit a scale of the bridge girder model 12, and the bridge girder model 12 is submerged to a prescribed depth from a position in contact with a water surface 7a, at a position control amount corresponding to chronologically changing additive inverse of the water level of the tsunami model wave. An amount of air in an air reservoir generated in the recesses 16a, 16b, 16c of the bridge girder model 12 simulates an actual bridge girder submerging due to tsunami. Thus, a load exerted on the bridge girder model 12 is measured in this state, and the tsunami wave force exerted on the bridge girder is derived based on the measurement result.SELECTED DRAWING: Figure 1
【課題】 構造物下面側の凹部に生じる空気溜まりの影響を正しく評価する。【解決手段】 橋桁模型１２は、実際の橋桁に対応する凹部１６ａ，１６ｂ，１６ｃを下面側に備える。曳航水槽１の台車４には、ボールねじ機構９により昇降動作可能な昇降台８を設け、その下側に、ロードセル１０と連結部材１１を介して橋桁模型１２を取り付ける。台車４を、津波を橋桁模型１２の縮尺に応じてモデル化した波の流速に一致した速度で走行させた状態で、橋桁模型１２を、水面７ａに接する位置から、津波をモデル化した波の時系列変化する水位の反数に応じた位置制御量で、所定の深度まで水没させる。橋桁模型１２の凹部１６ａ，１６ｂ，１６ｃに生じる空気溜まりの空気量は、実際の橋桁が津波を受けて水没する状態を模したものとなるので、この状態で、橋桁模型１２に作用する荷重を計測し、その計測結果を基に、橋桁が津波より受ける波力を求める。【選択図】図１
METHOD AND DEVICE FOR MEASURING TSUNAMI WAVE FORCE
津波波力計測方法及び装置
YAMAUCHI KUNIHIRO (Autor:in)
22.03.2016
Patent
Elektronische Ressource
Japanisch
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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