Elasto-Plastic Earthquake Response Analysis of Circular Shape Rc Bridge Pier By Means of 3d-Fem

Abstract eng:
In this paper, elasto-plastic dynamic response analysis of a circular shape RC pier subjected to multi-directed strong motion was conducted by means of three-dimensional finite element method (3D-FEM), in which axial rebars and confining stirrups were modeled precisely and the material non-linearity of concrete was numerically considered. An applicability of the proposed numerical analysis method was confirmed by comparing with the experimental results of three-dimensional shaking table tests for one-forth scale model of circular shape RC pier. The dimensions are of 600 mm in diameter and 2,140 mm in height. 27,000 kg mass was set on the model to mockup the mass of superstructure. Earthquake ground motion measured at Tsugaru Ohashi in Nihonkai-Chubu Earthquake, 1983 was used as input ground motion. From this study, it is confirmed that dynamic response waves and damages reaching ultimate state of rebar buckled of the RC pier can be rationally simulated by using the proposed numerical analysis method.

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