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- W602034174 abstract "THE COMMON METHODS OF MEASURING THE EARTH PRESSURE APPLIED ON STEEL TUNNEL SUPPORTS ARE CLASSIFIED AS THE TWO FOLLOWING: (1) THE METHOD MEASURING THE EARTH PRESSURE DIRECTLY BY EARTH PRESSURE GAUGE, LOAD ALL AND SO ON, AND (2) THE METHOD CALCULATING IT INDIRECTLY FROM THE MEASURED STRAIN GENERATED IN THE STEEL TUNNEL SUPPORT. RECENTLY THE LATTER METHOD (2) HAS COME TO BE THE MAIN ONE IN USE, BUT IT IS VERY DIFFICULT TO CALCULATE THE EARTH PRESSURE EXACTLY FROM THE STRAIN MEASURED ONLY AT THE UPPER AND LOWER FLANGES OF THE STEEL TUNNEL SUPPORT (H-STEEL), BECAUSE ONLY TWO SECTIONAL FORCES (BENDING MOMENT AND AXIAL FORCE) CAN BE CALCULATED FROM THE MEASURED STRAIN ABOVE STATED AND THIRD SECTIONAL FORCE ( SHEARING FORCE) REMAINS UNKNOWN. IN THIS PAPER IT IS PROPOSED THAT THE SHEARING FORCE CAN BE OBTAINED FROM THE MEASURED STRAIN OF A ROSSETTE GAUGE, WHICH CAN MEASURE STRAIN IN THREE DIRECTIONS, AND THE EARTH PRESSURE APPLIED ON THE STEEL TUNNEL SUPPORT CAN BE EXACTLY CALCULATED FROM THE BENDING MOMENT, THE AXIAL FORCE AND THE SHEARING FORCE BY SETTING UP THE EQUATION OF EQUILIBRIUM. THE ABOVE-MENTIONED METHOD IS NOT AFFECTED BY THE JOINT OF STEEL SUPPORT BETWEEN THE MEASURING SECTIONS. FURTHERMORE, EVEN IF A STRAIN GAUGE AT A CERTAIN PLACE GOES WRONG, IT MAY BE POSSIBLE TO ESTIMATE THE EARTH PRESSURE BY SETTING UP THE EQUATION OF EQUILIBRIUM BETWEEN THE NEXT MEASURING SECTIONS. /AUTHOR/" @default.
- W602034174 created "2016-06-24" @default.
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- W602034174 date "1968-03-01" @default.
- W602034174 modified "2023-09-27" @default.
- W602034174 title "A METHOD OF MEASUREMENT FOR THE CALCULATION OF THE EARTH PRESSURE APPLIED ON STEEL TUNNEL SUPPORTS /IN JAPANESE/" @default.
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