Application to durability verification and improvement accuracy of time-dependent structural analysis method

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A 3-dimensional time-dependent structural analysis method was developed based on Rigid Body Spring Method, which is applicable to simulate cracking behavior of concrete accurately. The applicability of the developed method on the degradation prediction of concrete structures was verified. The method was applied to the phenomenon of rebar corrosion problem and fire proof problem, which both are important problem for durability verification of concrete structures. The method could evaluate not only corrosion crack propagation behaviors but also spalling of concrete block from an existing structure. Regarding the fire proof problem, the explosive spalling behavior could be simulated due to fire and the mechanism was clarified.