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Time-dependent Seismic Performance of Reinforced Concrete Member under Common Atmosphere Environment
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    Abstract:

    Based on high-precision nonlinear finite element analysis, the multi-factor combined effects on reinforced concrete were considered, including concrete carbonation, reinforcement corrosion, and bond-slip performance degradation. And a refined finite element model was established to investigate the influence of durability deterioration on the seismic performance of reinforced concrete members in common atmosphere environment from corrosion rate of reinforcement and carbonation rate of concrete. It is revealed that ,when the service life was less than 30 years, the seismic performance of reinforced concrete members was changed little, while after 30 years, it degraded significantly. On the other hand, when the service life reached 100 years, concrete bearing capacity decreased to 22.5 %, stiffness decreased to 33.5 %, ductility decreased to 36.7 % and energy dissipation decreased to 40.5 %. To this end, it suggests that the influence of the service life and durability deterioration on seismic performance of the reinforced concrete members in common atmosphere environment should be considered in seismic design to guarantee the earthquake-resisting capacity of the structures.

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  • Online: March 21,2016
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