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A platform for research: civil engineering, architecture and urbanism
METHOD, DEVICE AND PROGRAM FOR GENERATING LIQUEFACTION STRENGTH CURVE
PROBLEM TO BE SOLVED: To generate a liquefaction strength curve at a high accuracy even when a number of specimens is small.SOLUTION: A first arithmetic operation section 20 of a liquefaction strength curve generation device 14 calculates energy consumption by a specimen 48. The first arithmetic operation section 20 also generates a relationship between an increment in normalized cumulative energy consumption and a repeated stress ratio of repeated loading, the increment in the normalized cumulative energy consumption being derived by dividing the cumulative energy consumption by effective constraint pressure at a time of start of n-th repeated loading. Furthermore, the first arithmetic operation section 20 generates a relationship between the normalized cumulative energy consumption and an excessive pore water pressure ratio, the normalized cumulative energy consumption being derived by dividing the cumulative energy consumption by the n-th effective constraint pressure ratio. A second arithmetic operation section 22 calculates a number of repeated loading necessary for liquefying soil of the specimen 48, based on the relationships between the increment in the normalized cumulative energy consumption and the repeated stress ratio of the repeated loading, and between the normalized cumulative energy consumption and the excessive pore water pressure ratio.SELECTED DRAWING: Figure 1
【課題】供試体の数が少数であっても、液状化強度曲線を精度良く生成することができる。【解決手段】液状化強度曲線生成装置１４の第１演算部２０は、供試体４８の消費エネルギーを算出する。また、第１演算部２０は、累積消費エネルギーをｎ回目の繰返し載荷の開始における有効拘束圧によって除することにより得られる正規化された累積消費エネルギーの増分と、繰返し載荷の繰返し応力比との関係を生成する。また、第１演算部２０は、累積消費エネルギーをｎ回目の有効拘束圧によって除することにより得られる正規化された累積消費エネルギーと、過剰間隙水圧比との関係を生成する。第２演算部２２は、正規化された累積消費エネルギーの増分と繰返し載荷の繰返し応力比との関係、及び正規化された累積消費エネルギーと過剰間隙水圧比との関係に基づいて、供試体４８の土が液状化に至るまでの繰返し載荷の回数を算出する。【選択図】図１
METHOD, DEVICE AND PROGRAM FOR GENERATING LIQUEFACTION STRENGTH CURVE
PROBLEM TO BE SOLVED: To generate a liquefaction strength curve at a high accuracy even when a number of specimens is small.SOLUTION: A first arithmetic operation section 20 of a liquefaction strength curve generation device 14 calculates energy consumption by a specimen 48. The first arithmetic operation section 20 also generates a relationship between an increment in normalized cumulative energy consumption and a repeated stress ratio of repeated loading, the increment in the normalized cumulative energy consumption being derived by dividing the cumulative energy consumption by effective constraint pressure at a time of start of n-th repeated loading. Furthermore, the first arithmetic operation section 20 generates a relationship between the normalized cumulative energy consumption and an excessive pore water pressure ratio, the normalized cumulative energy consumption being derived by dividing the cumulative energy consumption by the n-th effective constraint pressure ratio. A second arithmetic operation section 22 calculates a number of repeated loading necessary for liquefying soil of the specimen 48, based on the relationships between the increment in the normalized cumulative energy consumption and the repeated stress ratio of the repeated loading, and between the normalized cumulative energy consumption and the excessive pore water pressure ratio.SELECTED DRAWING: Figure 1
【課題】供試体の数が少数であっても、液状化強度曲線を精度良く生成することができる。【解決手段】液状化強度曲線生成装置１４の第１演算部２０は、供試体４８の消費エネルギーを算出する。また、第１演算部２０は、累積消費エネルギーをｎ回目の繰返し載荷の開始における有効拘束圧によって除することにより得られる正規化された累積消費エネルギーの増分と、繰返し載荷の繰返し応力比との関係を生成する。また、第１演算部２０は、累積消費エネルギーをｎ回目の有効拘束圧によって除することにより得られる正規化された累積消費エネルギーと、過剰間隙水圧比との関係を生成する。第２演算部２２は、正規化された累積消費エネルギーの増分と繰返し載荷の繰返し応力比との関係、及び正規化された累積消費エネルギーと過剰間隙水圧比との関係に基づいて、供試体４８の土が液状化に至るまでの繰返し載荷の回数を算出する。【選択図】図１
METHOD, DEVICE AND PROGRAM FOR GENERATING LIQUEFACTION STRENGTH CURVE
液状化強度曲線生成方法、液状化強度曲線生成装置、及び液状化強度曲線生成プログラム
HONDA TAKESHI (author) / SHIGENO YOSHIMASA (author)
2017-10-26
Patent
Electronic Resource
Japanese
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