FINITE ELEMENT ANALYSIS METHOD FOR SHIELD TUNNEL CONSIDERING INFLUENCE OF CORROSION OF SEGMENT JOINT

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  • 継手鋼材の腐食の影響を考慮したシールドトンネルの有限要素解析法の提案

Abstract

<p> There are some cases where the deterioration of RC segments caused by chloride attack is observed in railway shield tunnels located in seaside area and under tidal rivers. This research focuses on the deterioration of segment joints and reveal the characteristics of chloride ion penetration near the segment joints by accelerated tests. Loading tests were carried out with deteriorated segment joints and revealed that rotation stiffness reduces with the corrosion of steel material near the joints. This paper also proposed the modelling method of segment joint considering the reduction of rotation stiffness caused by the corrosion of steel material for the numerical calculation of 3D finite element analysis and validated the method by simulating the loading tests.</p>

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