p法FEMによる水抜き穴付コンクリート排水管の応力解析

概要

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A finite element analysis of precast concrete drainages was conducted. The drainage has inclined small holes to drain water into itself from the top surface. The holes can disturb stress distiributions of a drainage and induce stress concentration in the vicinity of themselves. The main variables of the analysis were slope of the top surface, bearing coefficients of surrounding ground soil, existence of holes, diameter of a hole, and interval of holes. The analytical results showed followings: the safty factor obtained from the conventional specification is greater than that from FEM though both methods give safe estimation; the maximum principal stress exceeds the bending strength of concrete; the increase in angle of the top surfase induces the increase of tensile stresses at the top and bottom edges of a drainage hole; the effect of bearing coefficients of surrounding ground on analytical results is small.
香川高等専門学校の論文