A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To provide a reliability quantification method for dominant frequencies that are estimated based on measurement results for microtremors.SOLUTION: A ground estimation method for estimating dominant frequencies of a ground that has hard bedrock below the ground surface includes: a microtremor measuring step; a spectrum calculation step; a dominant frequency estimation step; a target spectrum ratio setting step for setting a target spectrum ratio based on at least one of an HX/V spectrum ratio and HY/V spectrum ratio; a target frequency setting step for setting the range of frequencies between the upper limit frequency that is larger than the dominant frequency and the lower limit frequency that is smaller than the dominant frequency according to the target spectrum ratio: a normalized moment calculation step for calculating the area of the target spectrum ratio in the target frequency and the moment around the dominant frequency, and calculates a normalized moment obtained by dividing the moment by the area; and a reliability index calculation step for calculating a reliability index for the dominant frequency based on the normalized moment.SELECTED DRAWING: Figure 3
【課題】地盤の常時微動の測定結果に基づき推定された卓越振動数の信頼性定量化方法を提供する。【解決手段】地表面の下方に硬質基盤を有する地盤の卓越振動数を推定する地盤推定方法であって、常時微動測定工程と、スペクトル算出工程と、卓越振動数推定工程と、ＨＸ／Ｖスペクトル比とＨＹ／Ｖスペクトル比のうち少なくとも一方に基づいて対象スペクトル比を設定する対象スペクトル比設定工程と、対象スペクトル比において、卓越振動数より大きい上限振動数と、卓越振動数より小さい下限振動数との間の振動数の範囲を対象振動数と設定する対象振動数設定工程と、対象振動数における対象スペクトル比の面積と、卓越振動数周りのモーメントとを算出し、モーメントを面積で除算した基準化モーメントを算出する基準化モーメント算出工程と、基準化モーメントに基づいて卓越振動数に関する信頼性指標を算出する信頼性指標算出工程とを有する。【選択図】図３
To provide a reliability quantification method for dominant frequencies that are estimated based on measurement results for microtremors.SOLUTION: A ground estimation method for estimating dominant frequencies of a ground that has hard bedrock below the ground surface includes: a microtremor measuring step; a spectrum calculation step; a dominant frequency estimation step; a target spectrum ratio setting step for setting a target spectrum ratio based on at least one of an HX/V spectrum ratio and HY/V spectrum ratio; a target frequency setting step for setting the range of frequencies between the upper limit frequency that is larger than the dominant frequency and the lower limit frequency that is smaller than the dominant frequency according to the target spectrum ratio: a normalized moment calculation step for calculating the area of the target spectrum ratio in the target frequency and the moment around the dominant frequency, and calculates a normalized moment obtained by dividing the moment by the area; and a reliability index calculation step for calculating a reliability index for the dominant frequency based on the normalized moment.SELECTED DRAWING: Figure 3
【課題】地盤の常時微動の測定結果に基づき推定された卓越振動数の信頼性定量化方法を提供する。【解決手段】地表面の下方に硬質基盤を有する地盤の卓越振動数を推定する地盤推定方法であって、常時微動測定工程と、スペクトル算出工程と、卓越振動数推定工程と、ＨＸ／Ｖスペクトル比とＨＹ／Ｖスペクトル比のうち少なくとも一方に基づいて対象スペクトル比を設定する対象スペクトル比設定工程と、対象スペクトル比において、卓越振動数より大きい上限振動数と、卓越振動数より小さい下限振動数との間の振動数の範囲を対象振動数と設定する対象振動数設定工程と、対象振動数における対象スペクトル比の面積と、卓越振動数周りのモーメントとを算出し、モーメントを面積で除算した基準化モーメントを算出する基準化モーメント算出工程と、基準化モーメントに基づいて卓越振動数に関する信頼性指標を算出する信頼性指標算出工程とを有する。【選択図】図３
GROUND ESTIMATION METHOD
地盤推定方法
HAGIWARA YOSHINORI (author)
2020-08-31
Patent
Electronic Resource
Japanese
GROUND ESTIMATION DEVICE, GROUND ESTIMATION METHOD, AND PROGRAM
| European Patent Office | 2024
GROUND STRENGTH ESTIMATION METHOD, AND GROUND STRENGTH ESTIMATION PROGRAM
| European Patent Office | 2021