都市型水害対策用ゴム製止水構造の非線形有限要素解析とその検証

概要

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In recent years, the flood disaster caused by 'guerrilla' heavy rain has been increasing in many regions. Once the flood disaster occurs in an urban area, the economic damage becomes high denomination because of the highly and widely developed underground spaces including subway and underground mall. In this paper, we focus on a water-stop structure made of fabric reinforced rubber and steel members, and we propose a rational design tool by employing a nonlinear Finite Element (FE) Analysis. The water-stop structure includes several kinds of nonlinearity in the mechanical response analysis. One is material nonlinearity mainly for the fabric reinforced rubber, and the other is boundary nonlinearity related to contact behavior. The second nonlinearity problem can be solved by the commercial FE software, but the first material nonlinearity cannot support with pre-set material library. Therefore, original material constitutive model, which is based on the anisotropic hyperelasticity, is applied to the nonlinear FEM by using user defined subroutine. FE analysis of the water-stop structure with our proposed constitutive mode is validated with comparisons of experimental tests, in which the hydrostatic pressure acts on the water-stop structure.
Japan Society of Civil Engineersの論文